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New Twitter-Based Hedge Fund Beats the Stock Market

nonprofiteer writes "Derwent Capital, a new hedge fund that makes trades and investments based on Twitter sentiment, beat the market — and other hedge funds — in its first full month of trading. From the Atlantic: 'Using an algorithm based on the social media mood that day, the hedge fund predicted the market to make the right trades. Sounds unbelievable that something cluttered with mundane musings and media links could have anything smart to say about the market. But it's working so far.' Blind luck?"

143 of 209 comments (clear)

  1. Cool by itchythebear · · Score: 3, Funny

    Twitter may have finally found a way to make a profit!

    --
    If what I just said sounded like a troll, it was probably just a failed attempt at humor.
    1. Re:Cool by Svartalf · · Score: 1

      Heh... It's certainly nothing worse than anything else the hedge funds do to try to "make a profit".

      --
      I am not merely a "consumer" or a "taxpayer". I am a Citizen of the State of Texas
    2. Re:Cool by wiedzmin · · Score: 1

      In other news: Million monkeys typing on typewriters have written "War and Peace"! I suggest waiting until they are able to demonstrate consistent results as opposed to proclaiming great success after first month. I'm going with 'blind luck' on this one for now.

      --
      Bow before me, for I am root.
    3. Re:Cool by jamiesan · · Score: 1

      But did they get high score?

      They might want to try on a higher difficulty setting.

    4. Re:Cool by cusco · · Score: 1

      Two decades ago the Wall Street Journal pitted the "best" (as in the most expensive) fund management experts on the NYSE against a blindfolded secretary throwing darts at the Dow Jones listing. She beat ALL of the experts every month but one over the course of a year, and her performance was about 50 percent higher than the next-best performing analyst. This news doesn't surprise me a bit.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    5. Re:Cool by TheLink · · Score: 1, Funny

      Ah but who earned more for themselves and continued earning more?

      --
    6. Re:Cool by Yamioni · · Score: 1

      The secretary. Man, you should have seen what this lady wore to work!

      --
      Cool post bro, highfive \o
    7. Re:Cool by Smauler · · Score: 1

      You can't make money on stocks now... the FTSE is about the same level as it was in the early 90's. No one seems to mention this - if you'd invested across the board, 20 years ago, all you'll have back is the dividends.

      Money out of nothing doesn't work.... the reason pension funds etc are doing crap is because the markets aren't growing. Pension funds did invest across the board, and because there's no real inflation in their investment, they're in trouble.

      In desperation, banks have been looking to new markets, which might sustain them for a while.

      This kind of article truly annoys me, since it seems to project optimism.... the market hadn't moved for about 15 years, all the gains were in the first 5. And now is the time to invest?

    8. Re:Cool by TheLink · · Score: 1

      A blindfold?

      --
  2. One whole month! by Anonymous Coward · · Score: 3, Insightful

    It beat the market for one whole month? Wow! That puts them in the same class as 50% of high-school finance students!

    Show me the three year and I might start to be impressed. If it doesn't go broke in 10 years, then I might take it seriously. A random pick of stocks has a non-negligible chance of beating the market as a whole in a single month.

    1. Re:One whole month! by TheRaven64 · · Score: 4, Informative

      There's an old scam that works because of this. You set up a few funds, say 30, and make random trades with each one. On average, most of them will do about as well as the market as a whole. A few of them will do much worse. You close these. A few will do much better. You then get people to invest in these (with the obligatory disclaimer that past performance does not ensure future returns).

      --
      I am TheRaven on Soylent News
    2. Re:One whole month! by Anonymous Coward · · Score: 1

      Ha! Sounds like you just described mutual funds!

      Wait...

      brbmovingmoney

    3. Re:One whole month! by rilister · · Score: 1

      "Even a stopped clock tells the right time twice a day"

      --
      'This writing business. Pencils and what-not. Over-rated if you ask me. Silly stuff. Nothing in it' - Eeyore
    4. Re:One whole month! by ceoyoyo · · Score: 1

      More than 50%. There's a study that shows a random stock picker will beat the average fund manager.

    5. Re:One whole month! by Joce640k · · Score: 2

      In other news: Werdent Capital, a new hedge fund that makes trades and investments based on Facebook sentiment didn't beat the market or make any headlines.

      --
      No sig today...
    6. Re:One whole month! by greg1104 · · Score: 3, Interesting

      I always liked the related scam for selling stock selection services. You e-mail a group of marks "stock XYZ will go higher in the next month!", breaking them into (say) 4 groups. The next month, you contact everyone who got a good recommendation the last time with "stock ABC will go higher in the next month!". Repeat a few layers deep. After 3 or 4 such calls, a fraction of the people you contacted have now gotten nothing but winning picks from you; them you try to sell your picking service to.

    7. Re:One whole month! by Anne+Thwacks · · Score: 1

      Cease and desist - I have a patent on that!

      --
      Sent from my ASR33 using ASCII
    8. Re:One whole month! by Anonymus · · Score: 1

      That sounds like total bullshit. If you somehow MADE $3 million on your investment in the past year alone, I'd say now is the perfect time to get out. Not because it's a rainy day, but because that's enough money to retire and do whatever the hell expensive things you want for the rest of your life.

    9. Re:One whole month! by greg1104 · · Score: 2

      The fallacy at work here is what trading system developers call "curve fitting". If you're given a set of data and claim there's a correlation between two things in it, you can always fit a curve to predict one from the other with good accuracy if you work on it a while. Clear signs of curve fitting in play are "magic numbers"--constants like the "2 to 6 days" alluded to here, where the model doesn't work unless you get them right.

      The fun thing about curve fitting is that you never know when it's going to work or not. This curve was built against data from 2008. The market went in one direction for much of 2008--down, hard. This last month? Market went down, hard. I suspect what they've built is a system that errs often on the side of downward moves, and that's completely compatible with today's market too. Put that same system in the middle of a giddy bull market...and it can lose all of the profits it made in the other section at a shocking rate.

      Trading systems work out issues like this by collecting a lot of data to train against, only using a portion of it to train the model, and then testing the results against what's left. There wasn't nearly enough data available here for this one to have gone through that. Eventually, the market will no longer look like the one they drew a curve against, and then they're done.

    10. Re:One whole month! by wvmarle · · Score: 2

      No wonder, I bet the management fees of the random picker were far lower.

    11. Re:One whole month! by scheme · · Score: 1

      Glad I'm sitting on a bunch of gold bought in the 1990's at $400/oz. Made $3 million on paper from it this year. Not touching it though. It's not a rainy day - yet.

      That's BS. Gold has increased by around 10% since Jan 2011. Your $3 million paper profit represents $30 million in gold. If you have enough to keep $30 million in gold, you probably don't have any rainy day worries to deal with and you most likely wouldn't be posting on slashdot to begin with.

      --
      "When you sit with a nice girl for two hours, it seems like two minutes. When you sit on a hot stove for two minutes, it
    12. Re:One whole month! by balbus000 · · Score: 1

      Derren Brown did a similar thing with placing bets on horses

    13. Re:One whole month! by zero0ne · · Score: 1

      Someone has been watching too much Leverage :)

    14. Re:One whole month! by skydyr · · Score: 1

      That's not a scam, that's how mutual funds stick around!

    15. Re:One whole month! by BinarySolo · · Score: 1

      Your sig is deliciously appropriate for this story.

    16. Re:One whole month! by TheRaven64 · · Score: 1

      Once you have a lot of investors' money, there are lots of things you can do. One is to charge a management fee. Do that, and this scam is 100% legal. More shady alternatives include investing the money in your own businesses, or using it to buy shares that you own at an inflated price.

      --
      I am TheRaven on Soylent News
    17. Re:One whole month! by arglebargle_xiv · · Score: 1

      It beat the market for one whole month? Wow! That puts them in the same class as 50% of high-school finance students!

      And cows (researchers marked a fenced area into a grid, assigned a stock to each square, and invested where the cows dropped a cowpat). And chickens (same sort of thing but they invested where chickens pecked up corn).

      Show me the three year and I might start to be impressed. If it doesn't go broke in 10 years, then I might take it seriously. A random pick of stocks has a non-negligible chance of beating the market as a whole in a single month.

      What he said.

  3. Just throw darts by Jordan+(jman) · · Score: 3, Funny

    I think twitter will have the same effect as a monkey throwing darts...

    http://www.automaticfinances.com/monkey-stock-picking/

    1. Re:Just throw darts by localman57 · · Score: 1

      Not really. There is no correlation between darts and the stock market. Twitter stuff is based on the hive mind of humanity. The stock market is also based on the hive mind of humanity. It's resonable to expect that there is some correlation. But the correlation is only useful if some attribute of twitter can be shown to lead the market. If there's not a predictable correlation, it's worthless. If there's a correlation, but the market reacts first, and twitter lags, then its' worthless.

    2. Re:Just throw darts by spuke4000 · · Score: 2

      Sir, I would like to buy your monkeys.

      --
      This post cannot be rebroadcast without the express written constent of Major League Baseball.
    3. Re:Just throw darts by Joce640k · · Score: 1

      But the correlation is only useful if some attribute of twitter can be shown to lead the market.

      And only if you can eliminate all random events from the world. eg. What if there's an earthquake tomorrow? The CEO is discovered having an affair? Some granny goes on TV saying her car accelerated suddenly...?

      --
      No sig today...
    4. Re:Just throw darts by cmr-denver · · Score: 1

      But the correlation is only useful if some attribute of twitter can be shown to lead the market.

      And only if you can eliminate all random events from the world. eg. What if there's an earthquake tomorrow? The CEO is discovered having an affair? Some granny goes on TV saying her car accelerated suddenly...?

      Uh, no. If Twitter continues to lead the markets (i.e. people tweet their sentiment first, and act second), and that time period is long enough to act on, then this will be wildly successful, especially because of random events. Granny shows up on TV, many people tweet "Foo Motors tries to kill old people", then unload their stock. If this company can figure that out fast enough, and short sells the stock before the mass unload causes the stock to tank, they'll make a killing.

    5. Re:Just throw darts by Anne_Nonymous · · Score: 1

      Even a thousand monkeys throwing typewriters are a dartboard are right twice a day.

    6. Re:Just throw darts by localman57 · · Score: 3, Funny

      Fuck that guy. I've written a program that models the monkeys with a high degree of accuracy, and it's for sale now. Equally accurate results, with no bannanas necessary, and no monkey shit to clean up.

    7. Re:Just throw darts by Sez+Zero · · Score: 1

      Not really. There is no correlation between darts and the stock market. Twitter stuff is based on the hive mind of humanity.

      So Twitter spammers can drive the market now?

    8. Re:Just throw darts by localman57 · · Score: 1

      I don't know if they can, but they're already trying. Pump and dump of penny stocks via email has been around as long as I've been on the Internet. No reason to think they won't use other media. However, getting one hedge fund to buy or not buy a particular stock is unlikely to drive the overall market enough to profit much from it. At least not in the quantities I picture a hedge fund based on twitter moving.

    9. Re:Just throw darts by Yamioni · · Score: 1

      Fuck that guy. I've written a program that models Wall Street with a high degree of accuracy, and it's for sale now. Equally accurate results, with no bannanas necessary, and no monkey shit to clean up.

      FTFY

      --
      Cool post bro, highfive \o
  4. One month? by Mabbo · · Score: 3, Interesting

    They did better than average for one month. I could buy a random subset of stocks, and still have a 50% chance of beating the average. Call me if they can maintain this for 12 months straight. Then maybe they can see some of my money.

    1. Re:One month? by elsurexiste · · Score: 2

      I could buy a random subset of stocks, and still have a 50% chance of beating the average.

      Heh, good luck with that! Actually, chances are lower because the increases in stock value are not homogeneous.

      --
      I rarely respond to comments. Also, don't ask for clarifications: a brain and Google are faster, believe me!
    2. Re:One month? by ginbot462 · · Score: 1

      My sentiments exactly. Not to mention other algorithms that start incorporating similar tactics mitigating the effectiveness. Just beware the feedback loops (reflexivity).

      Ooops...
      http://idle.slashdot.org/story/11/04/26/141247/Amazon-Automatic-Pricing-Lists-Book-At-23M

      --
      Atlas Shrugged : Thematic Story :: Battlefield Earth : Organized Religion
    3. Re:One month? by DanTheStone · · Score: 1

      Illustration: There are 100 stocks. 1 goes way way up, like 100x. 99 go very slightly down. A random subset of 10 stocks does not have a 50% chance of beating the average, since there is not a 50% chance it will include the 1 that went up. (Yes, I know I'm agreeing with you.)

    4. Re:One month? by medv4380 · · Score: 1

      You really should look up the definition of Average. You're using the definition of Median not Average. Your definition of average only applies if the stock market results are normally distributed, or in another way equal number of winners and losers and anyone who watches the stock market knows that is rare otherwise it would go up and down. What they did was they managed to get a profit of 1.85% when the average went down by 2.2%.

      A longer test would be nice but comparing them to the return rate for July of other hedge funds would be better. There was a test years back comparing random monkey picks to professional hedge fund managers. That was a better comparison then comparing it to the Average. http://www.automaticfinances.com/monkey-stock-picking/

    5. Re:One month? by sribe · · Score: 1

      Heh, good luck with that! Actually, chances are lower because the increases in stock value are not homogeneous.

      Your reasoning is backward, if the increases were homogeneous, the chance of a random subset beating the market would be 0%. On the other hand, if the deviations from the average are randomly distributed the chance would be 50%, and this seems pretty likely.

    6. Re:One month? by sribe · · Score: 1

      Illustration: There are 100 stocks. 1 goes way way up, like 100x. 99 go very slightly down. A random subset of 10 stocks does not have a 50% chance of beating the average, since there is not a 50% chance it will include the 1 that went up. (Yes, I know I'm agreeing with you.)

      And what exactly are the odds of such an odd distribution? Rather small perhaps? Isn't it more likely that deviations from the average will be spread more evenly???

    7. Re:One month? by ceoyoyo · · Score: 1

      There are 100 stocks. 1 goes way down, to like 1%. 99 go very slightly up. A random subset of 10 stocks does not have a 50% chance of beating the average, since there is not a 50% chance it will include the 1 that went down. (Yes, I know I'm disagreeing with you.)

      In concrete terms, you're suggesting that the distribution of stock changes is highly skewed, and claiming that it MUST be skewed in terms of a long tail of stocks going UP. You're going to have to justify that.

    8. Re:One month? by Syberz · · Score: 1

      In fact, wasn't there a study a few years ago where they let a bunch of preschoolers pick stocks at random and they ended up doing better than the fund managers?

      --
      ~Syberz
    9. Re:One month? by archen · · Score: 1

      This also depends on what point of a cycle you look at. How long did the sub-prime mortgage market look great? Anyone can extrapolate that a stock will probably keep going up because it has been for a while, the key is to survive downturns and come out ahead when you take out your money. This seems more like a great way to end up with a lot of assets pushed into "it looks too good to be true" markets.

    10. Re:One month? by ftobin · · Score: 1

      Due to the Small minus Large premium, randomly choosing stocks has outperformed over the long term. See equal-weighted indexes as an example of this.

    11. Re:One month? by SleazyRidr · · Score: 1

      Yes, but there's also a chance that 1 goes way down, while 99 go slightly up. With no other information we'd have to conclude that there is an equal chance of either situation occurring, thus there would indeed be a 50% chance of beating the market with your random 10 stocks.

    12. Re:One month? by lee1026 · · Score: 1

      On the other hand, a random subset of 99 stocks have a VERY good chance of beating the market....

    13. Re:One month? by vux984 · · Score: 1

      1 goes way way up, like 100x. 99 go very slightly down.

      Hmm.. That's not the stock market i know. In the stock market i know...

      In a given month, a stocks go up (some go up a lot, some barely at all), b stocks go down some go down a lot, and some barely at all), c stocks are delisted (removed entirely - lets just consider them bankrupt although there are other situations that can cause a symbol to stop trading that aren't so dire), and d stocks are newly listed.

      A random selection of stocks is likely to do worse than the market because you have a chance of picking stocks that get delisted, (and of course no chance of picking stocks that were listed after your picks).

      This skews random picks towards doing slightly worse than the market.

      But over all, its still probably pretty close to a 50%/50% split.

    14. Re:One month? by elsurexiste · · Score: 1

      Really? I thought it was much more likely that a few stocks will rise really high, while the rest fluctuate randomly, so, in order to beat the market, one would have to pick those few that "drive the economy".

      Nice thought, the one about being homogeneous nullifying your chances :) .

      --
      I rarely respond to comments. Also, don't ask for clarifications: a brain and Google are faster, believe me!
    15. Re:One month? by Sique · · Score: 1

      Actually no. Stocks often have a geometrical distribution, with a large group slightly below the average, and a few very high.

      --
      .sig: Sique *sigh*
    16. Re:One month? by cusco · · Score: 1

      There are a bunch of them, actually. The Wall Street Journal used a blindfolded secretary throwing darts, someone else used monkeys throwing darts, one of the hedge funds used a chicken pecks (as a joke, and then were appalled when the chicken beat their own managers). It's pretty well established now that managed funds are just about the worst possible way to invest your money, which is probably whey most companies insist that their low-level employees invest their 401k that way but put no such restrictions on executives.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    17. Re:One month? by smellotron · · Score: 1

      In concrete terms, you're suggesting that the distribution of stock changes is highly skewed, and claiming that it MUST be skewed in terms of a long tail of stocks going UP.

      The specific distribution of stock changes is less important than the lesson: the law of large numbers doesn't apply to the stock market, because (1) stock prices don't have a fixed mean, and (2) stock prices are not independent random variables. But to address your specific concern, let me attempt some armchair analysis: The stock market is not zero-sum: if stock prices go up, there are many beneficiaries:

      • stock holders win (paper) profits: citizens (long investors) are happy.
      • stock issuers gain (paper) value: corporations are happy
      • the president gets to brag about single-handedly turning around the economy and creating jorbs: politicians are happy

      On the other hand, if stock prices go down, the only beneficiaries are short-selling investors (note: market makers are hurt by solid moves in either direction). We can discount short-selling investors in aggregate because investors are long on average (i.e. number of shares issued is always greater than 0). Plus, short-selling is more expensive/complex and therefore short investors tend to be professionals or wealthy, garnering no empathy from the public.

      Overall, there is an incentive for Congress and the various regulatory agencies to see a stock market that always goes up, because it keeps people happy. This is visible in existing regulations: Stocks that drop in value rapidly will have extra rules placed on short sales, but no such rules are placed on buys for stocks that rise in value rapidly. You can observe this in recent news as well, with short-sale bans happening in Europe. It stands to reason that the distribution of stock changes has a positive skew and non-stationary mean.

    18. Re:One month? by ceoyoyo · · Score: 1

      We're talking about the mean of the CHANGES in stocks, so the law of large numbers and your point about a non-stationary mean don't apply.

      The rest of your post about beneficiaries, regulation, and happy people is irrelevant to the topic.

  5. hmmmm by rilles · · Score: 1

    There is a movie (he takes some pills to make him "smart") based loosely on a guy making a fortune in the stock market by ignoring logic and stats - by just watching rumours and hype he predicted the market.

    1. Re:hmmmm by rwven · · Score: 1

      Limitless

    2. Re:hmmmm by definate · · Score: 2, Funny

      He knows the movie idea has limitless potential, but he just wants to know what the name of it was.

      --
      This is my footer. There are many like it, but this one is mine.
    3. Re:hmmmm by definate · · Score: 1

      Thanks, though some really thought I was serious.

      --
      This is my footer. There are many like it, but this one is mine.
  6. Brilliant by Anonymous Coward · · Score: 1

    This is absolutely brilliant because it tracks what the stock market is actually driven by, personal opinion. There's a lot of data that goes into peoples' investment choices, but in the end the stock market is more about what people THINK is valuable than what is actually valuable (Keynes described this using a beauty contest analogy: http://en.wikipedia.org/wiki/Keynesian_beauty_contest). Twitter is a great way to tap into that data as people freely and in real time report how they are feeling about various stocks.

    Of course this also suggests that stock markets are totally bogus, but that's another story...

    1. Re:Brilliant by alexander_686 · · Score: 1

      According to Benjamin Graham [Warren Buffet's proffesor] In the short term the stock market behaves like a voting machine, but in the long term it acts like a weighing machine. While short term supply and demand may be driven by public opinion, the long term trends tend to be determined by fundementals.

      And for another note, o.k. - they beat the stock market - but at what level of statistical significance? In June the stock market fell by 1.67%. I don't have the internal variance of the S&P, but if they lost less then 1% they might have found some short term quirk that hedge funds could exploite.

  7. I misread..."New Twister-Based Hedge Fund Beats... by farrellj · · Score: 1

    Now a Twister-Based Hedge Fund would be a lot more fun than a Twitter-Based one...

    ttyl
              Farrell

    --
    CAN-CON 2019 - Ottawa's only book oriented Science Fiction Convention! October 18-20, Sheraton Hotel, Ottawa, Canada h
  8. little rationality exist in short term market by haus · · Score: 1

    It should come as no surprise that markets often function (esp on the short term) based on rumor, gossip, mood swings vice reacting to actual intrinsic value of a company or a sector. Hence focusing on a form of media that specializes in the superficial is likely a reasonable decision for someone wanting to play a short term game.

    1. Re:little rationality exist in short term market by DogDude · · Score: 1

      I'd argue that there's little rationality in the long term market, as well. Since stocks rarely pay dividends these days, the stock price is completely and totally unconnected from any kind of rationality. It's simply a measure of what people will pay for that stock, and that, of course, is completely irrational.

      --
      I don't respond to AC's.
  9. Limitless by rwven · · Score: 2

    Sounds like the theory from the movie "Limitless" put into practice.

  10. Re:I misread..."New Twister-Based Hedge Fund Beats by ginbot462 · · Score: 1

    Probably just as accurate to boot.

    --
    Atlas Shrugged : Thematic Story :: Battlefield Earth : Organized Religion
  11. Volatility by mclearn · · Score: 1

    How much of this is attributed to excessive tweets due to, and in conjunction with, a highly volatile market?

    1. Re:Volatility by Tasha26 · · Score: 1

      Month 2 - "Ummm... due to high volume of fake tweets from anon accounts, we made a massive loss. Net growth: 0."

  12. Maybe not luck by poity · · Score: 1

    IANAE, but maybe in the current environment of uncertainty, there's more predictability in following the psychology and state of mind of investors than following the "fundamental" indicators. But it seems that also contributes partly to the problem where we see more and more mimicry, which leads to larger cascades of buying and selling, thus even more volatility and sense of uncertainty.

    --
    your thin skin doesn't make me a troll
  13. Irrational Exuberance and Irrational Fears by RobinEggs · · Score: 5, Interesting

    So by following Twitter trends he can make investments that beat other funds in the short run? Are we supposed to be even remotely surprised here?

    Everyone knows the stock market responds faster to fear and to delusions of sudden prosperity than to hard data; that's a large part of its problem.

    Detecting and exploiting those fears and delusions accurately is a good trick (and I'm sure it isn't easy, even with this method). But it doesn't make the man a genius by a long shot. Nor does it make him a useful investor: banking on the current "mood" means he's actually inflating the dangerous cycles of emotionally driven, short-term investment decisions rather than making any kind of long-term decisions.

    I've been ripped before for criticizing short term trading, including HFT trading, but I still think the people who keep the market even remotely stable and the people who make the market useful for it's true purpose (giving corporations a bond market and investors a place for potentially stable returns) are long term investors who follow the data.

    And following twitter isn't what I mean by data-driven decisions.

    1. Re:Irrational Exuberance and Irrational Fears by HerculesMO · · Score: 1

      Well said, and there's the argument that if capital gains go up, investors will be more likely to calm down because they will take tax hits on short deals rather than long term ones.

      I guess time will tell :)

      --
      The price is always right if someone else is paying.
    2. Re:Irrational Exuberance and Irrational Fears by Ibag · · Score: 1

      ...but I still think the people who keep the market even remotely stable and the people who make the market useful for it's true purpose (giving corporations a bond market and investors a place for potentially stable returns) are long term investors who follow the data.

      The problem is that without the people who are speculating and taking bets, you wouldn't have nearly as many people that could make serious investments in companies. People invest in companies (in the sense that you want them to) because they expect them to grow. This is all well and good until an investor decides that he's done investing in the company. Maybe he's less certain about the future growth of the company. Maybe he just needs to free up capital for something else. Whatever the reason, he needs to know before he invests that, when he's ready to pull out, there is someone who will buy up his shares. This is where speculators come in handy. Because they are concerned with the short term effects on stock price and not long term effects on growth, there is generally someone willing to buy what the investor wants to sell, regardless of why he wants to sell. And because there are people constantly buying and selling, because there is a wide market, the investor doesn't have to worry (under normal circumstances) about a shortage of buyers driving down the price: If the market believes there is a true worth to a share, the sale price will be much closer to that price than if there were a small number of sellers who might hold out for a better price because the seller has no real alternative. The more buyers and sellers, the smaller margins people will be forced to accept between the price they buy/sell for and their own perceived value of the stock. Moreover, outside of certain exceptional circumstances, this should lead to a certain amount of price stabilization, as unless something happens to affect the true value of the share (i.e.. new information to suggest that the long term profitability of the company has changed), you have a wide arrange of buyers and sellers ready to buy/sell at a continuum of prices. The price of a share won't drop a dollar if there are people willing to buy the share for $0.25 less than the last sale.

      The problem is that a large percentage of the market is speculation, and so the meaning of the stock price has changed. It has morphed from a measure of the value of the company to a measure of the perceived future value of the company to a measure of the perceived future value of the stock price. Of course, the underlying value (and expected future value) of the company still affect the stock price, but when your goal is short term profitability instead of long term allocation of capital, you are forced to be predominantly concerned with share price dynamics, which means that there are horrible feedback mechanisms which cause all sorts of undesired effects.

      Of course, this is a problem with how the market works, devoid of any of the newer concerns like algorithmic or high frequency trading. There are plenty of things to be said (on both sides) about their value, but that is outside the point I want to make, which is this:

      There are benefits to having some amount of speculation in stock markets, as they add liquidity, which makes non-speculative investors more willing to participate in the system. Problems arise when there is too much speculation, but that doesn't mean all speculation is bad or unhealthy. Unfortunately, putting limits on speculation is hard, and unlikely to ever be done in an optimal way. This is the natural outgrowth of that speculation, and while I personally believe it is more harmful than some other computer-based techniques (e.g. instead of algorithms which identify and then participating in the emotional binges in the market, algorithms which identify when the market has been irrational and set themselves up to profit when they course correct), it is a part of a necessary evil.

    3. Re:Irrational Exuberance and Irrational Fears by JesseMcDonald · · Score: 1

      Nor does it make him a useful investor: banking on the current "mood" means he's actually inflating the dangerous cycles of emotionally driven, short-term investment decisions rather than making any kind of long-term decisions.

      Actually, it's just the opposite. To the extent that the "mood" is irrational, and does not reflect long-term value, the best way to profit is to invest against the mood, buying from those cashing out due to irrational fears and selling to those irrationally willing to pay a premium. This tends to dampen the cycles, not inflate them.

      Simply copying irrational behaviors would tend to amplify the instability—but that wouldn't help them make a profit. The only way to profit, long-term, is to bring the prices closer to their proper levels, buying when they are irrationally low and selling when they're irrationally high.

      --
      "The state is that great fiction by which everyone tries to live at the expense of everyone else." - Bastiat
    4. Re:Irrational Exuberance and Irrational Fears by smellotron · · Score: 1

      ...banking on the current "mood" means he's actually inflating the dangerous cycles of emotionally driven, short-term investment decisions...

      Well that all depends upon how he trades. Suppose he sees information that tells him this:

      • ZVZZT is currently worth $20
      • everyone thinks ZVZZT is awesome today

      He has two courses of action. First, he can push the momentum that he expects:

      1. buy ZVZZT at $20
      2. wait for ZVZZT to go up
      3. sell ZVZZT at $21 or whatever

      This fails if ZVZZT fails to move (i.e. twitter sentiment is too weak to make a difference). This type of strategy will magnify the impact of emotional sentiment, increasing volatility. OTOH, he can do the same trade on the "back side":

      1. wait for ZVZZT to go up
      2. sell ZVZZT short at $21
      3. wait for ZVZZT to go back down to fundamental value
      4. buy back ZVZZT at $20

      This fails if the stock price doesn't revert in a reasonable time frame. This type of strategy dampens the effect of emotional sentiment, reducing volatility. In effect, this strategy uses the knowledge of emotional mispricing to eliminate the mispricing. So, hopefully this demonstrates that most any information about short-term trading sentiment can for both "good" (dampening oscillations, pushing prices always towards fundamental values) and "evil" (magnifying oscillations, letting prices swing around and benefiting from the momentum).

    5. Re:Irrational Exuberance and Irrational Fears by smellotron · · Score: 1

      ...stuff about the value of speculation in a continuous market...

      Well said, sir!

  14. Failsafe Investing by trout007 · · Score: 1

    Harry Browne wrote a book about investing called "Failsafe Investing". In he he makes a pretty good statement. You can't beat the market long term. Any investment you make based on past performance is not logical. He proposed a thought experiment. Take a room of 100 people. Ask them to individually pick heads or tails. Flip a coin 6 times. You will likely have at least one person that picked all 6 right. Are they psychic? Are they the best coin flip picker? Nope they were lucky. The same with investors that try to beat the market. And if you put your eggs in their basket they are subject to the same luck as everyone else.

    His advice that has helped me grow my portfolio?

    25% in S&P 500 fund
    25% in Gold Bullion
    25% in 30 year US Treasuries (Sell and buy new ones when they get within 25 years of maturity)
    25% in Money Market.

    Rebalance once a year.

    --
    I love Jesus, except for his foreign policy.
    1. Re:Failsafe Investing by Billly+Gates · · Score: 1, Interesting

      That looks obsolete. First off Gold is overvalued now and it is time to sell. Treasuries are no longer AAA and for short term the Us can repay its debt, but there is risk the TEA party will hold it hostage and by 2020 the GDP to assets ratio will be too much and will cause the US to be insolvent. Too much risk if you are looking for a safe investment ot offset more risky ones.

      I do not trust Wall Street and I am broke currently. If I had money I would avoid Wall Street altogether as they are driven by flash trading and people who trade before and after hours by looking at our transactions pending and setting the price before they go in and ripping us off.

      I guess in this economic age I would only trust bonds, but the interest is crap. What a terrible time to invest.

    2. Re:Failsafe Investing by RobinEggs · · Score: 1

      I don't agree with you.

      There are managers who've become famous for "beating the market" simply because they rationally examine what other people refuse to see and leave a field once they realize the ratings are all shit or they realize that data-driven investing has yielded to emotional positive-feedback loops.

      You don't beat the market with bold declarations about a coin flip, you beat it with cynicism and independent thought; few if any people can predict the economy or the performance of a particular company, but many people can make more rational decisions than most given the available data or detect and respond to increasingly emotional behavior in other investors.

      Sometimes this means making better investments than others; quite often it's as simple as getting off the train two stops before everyone else. I know it's considered a myth that you can time your entry and exit in the market, but sometimes it's really very possible, especially with the exit.

    3. Re:Failsafe Investing by iONiUM · · Score: 1

      I kind of agree with you. In reality, nobody can predict the market. But in practice, you don't need to. It's pretty easy to see a downtrend in the broad market, and when that happens you move from equities into bonds. And then when the market begins to trend upwards again, you do the opposite.

      All you really do is follow the trend, without making any risky moves, and you will always make money both when the market goes up, and when it goes down. It's not rocket science, but it does require moving money every few months (well, only lately. before it was pretty safe just sticking with index mutual funds or straight equity).

      I never understood this "diversify everything!" sentiment that plagues bank managers. It comes off as lazy, as no matter what 25% part of your portfolio (in the above example) goes up, another part will go down, since gold hedges stock and vice versa. You're always gaining/losing, hoping the gains outweigh the losses. How strange.

    4. Re:Failsafe Investing by trout007 · · Score: 1

      Let me elaborate the rebalancing. If any one gets below 15% or above 35% of your total holdings you sell and buy those categories to return to 25%. This allows you to automatically buy low and sell high.
      Also as you put more money into your account you put it in the cash holdings.

      I've been using this for about 10 years now. So I have been selling gold for the last few years as it climbed and took up more of the portfolio.
      Also during the crash in 2008 bonds spiked and I had to sell some and buy stock to rebalance.

      Since I've been using this I've averaged about an 8% per year return. You don't have to believe me run the numbers yourself they are all available.

      --
      I love Jesus, except for his foreign policy.
    5. Re:Failsafe Investing by trout007 · · Score: 1

      You are forgetting the rebalancing. When gold goes up and stocks go down enough you sell gold to buy stocks. When it reverses you do the same. He recommends rebalancing when one goes more than 10% from 25%.

      --
      I love Jesus, except for his foreign policy.
    6. Re:Failsafe Investing by MozeeToby · · Score: 1

      You can't beat the market long term.

      Is like saying that playing poker is all luck. Yeah, luck plays a part in it, maybe even a big part, but it's still the same group of 20 top players that finds themselves at the final table at tournament after tournament. People like Warren Buffet didn't become ludicrously rich just because they got lucky.

    7. Re:Failsafe Investing by Abstrackt · · Score: 1

      What a terrible time to invest.

      I completely disagree, there are some fantastic sales going on right now! Don't look at it as the market losing value, look at it as stocks being offered at one hell of a discount. ;)

      If you're looking for a reasonable return on investment and have any kind of debt you can just focus on paying that off instead. It's not a glamorous way to acquire extra money but you're guaranteed to "earn" (save) that amount of interest.

      --
      They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance. - Terry Pratchett
    8. Re:Failsafe Investing by nedlohs · · Score: 1

      Since I've been using this I've averaged about an 8% per year return. You don't have to believe me run the numbers yourself they are all available.

      I suspect it would be dependant on when you do that annual rebalance.

      But yes that mix will have done well, a much better idea that trying to pick stocks. Very US centric though,

    9. Re:Failsafe Investing by medv4380 · · Score: 1

      I'd lump gold and bonds into the same bucked and use what Buffet suggested one time and keep 1% in Bonds for each year you are. So if you're 35 then you keep 35% in the safe bond bucket. That way by the time you retire you already have most of your money in the safe buckets for your retirement.

    10. Re:Failsafe Investing by Bob+the+Super+Hamste · · Score: 1

      That actually doesn't look too different from what I have for my 401k and other investments. I have less in money markets but generally it is similar. A more general form is label the categories would be stocks, commodities, bonds, and cash.

      Now It is possible to get better than market returns fairly consistently but it requires that one studies and analyzes the data for long term gains and not chase fads, or has a planner who's job it is to do that. Over the last 7 years I have had an average return closer to 10% and that includes the worst year (2008) where I still came out ahead (it was only about 1% but it was still up for the year). Every year things get rebalanced and within each category there are other buckets. All of this is managed by the financial planner my wife and I have (he is a real certified financial planner) so we don't have to keep up on all of the details of analyzing and picking the various funds.

      --
      Time to offend someone
    11. Re:Failsafe Investing by iONiUM · · Score: 1

      Actually he said re-balance "once a year", which means to me he just has an arbitrary day he re balances, which (if he did it today, for example), could turn out bad. He's not reacting to the market, he's just doing things "because."

    12. Re:Failsafe Investing by Bob+the+Super+Hamste · · Score: 1

      No one can always time the market perfectly but a good planner/adviser should know through careful analysis when you are nearing the top of a peak or bottom of a trough. Granted you won't gain as much as you won't be getting in at the absolute bottom or out at the absolute top, but you will be able to catch most of the upswing and avoid all of the down swing (and no I don't mean daily market variations) so it becomes easy to beat the market when doing that. This is also why casinos won't let you skip more than one hand of blackjack in a shoe since if you are counting cards you would only play when the count is favorable.

      --
      Time to offend someone
    13. Re:Failsafe Investing by Dunbal · · Score: 1

      First off Gold is overvalued now and it is time to sell.

      Based on the "this is something I pulled out of my anus" technique. Exactly where did gold start becoming overvalued? I've been hearing this since $1000. What if I had sold my gold then? Gold is not like other commodities. Yes there is speculation in gold but the price keeps it out of reach of the little guy. Also people tend to hoard it as a very long term investment. It's a safety net. It's not a means of making profit but rather a means of safeguarding capital. Because when the dollar is gone and the Euro are gone, people will turn back to gold, either as a currency or as a means of establishing the value of a new currency.

      Feel free to tell people how you THINK that gold is overvalued. I will keep my gold. The price would have to fall under $400/oz for me to lose money. Imagine how well I sleep at night. I'll sleep even better when it hits $6000/oz. And if it doesn't, well my wealth has been safe. I was happy at $400/oz. Opportunity cost, you say? Put a price on feeling secure. I'll pay it.

      --
      Seven puppies were harmed during the making of this post.
    14. Re:Failsafe Investing by trout007 · · Score: 1

      Read again. He said re-balance once a year and if you are watching the market and there are some big swings check your portfolio to see if any go below 15% or above 35% or the total value. I check it once a month and it rarely requires re-balancing.

      --
      I love Jesus, except for his foreign policy.
    15. Re:Failsafe Investing by trout007 · · Score: 1

      Actually with the bond yields falling my bond prices are rising nicely. The oldest ones I bought 4 years ago for $100 and mature in 2037 and are yielding 5%. They are at about $127.

      --
      I love Jesus, except for his foreign policy.
    16. Re:Failsafe Investing by Lumpy · · Score: 1

      "Yes there is speculation in gold but the price keeps it out of reach of the little guy."

      no it doesn't.. Just dont be a prima donna buying "futures" or putting money in it with an investor. Get your hands dirty and go BUY Gold. Over the past 2 years I bought at well under going prices a lot of gold that is 12K and 24K by hitting garage sales and flea markets. A lot more silver as well that way. I'm a ultra little guy, I have $0.00 in the stock market. I do have 30 pounds of High quality silver and 15 pounds of 12K gold with 2 pounds of 24K gold stashed. I also have a 35 pound ingot of 99.97% nickel.

      I paid far FAR less than the going rate because I put effort into it. instead of being a lazy investor and clicking on icons in Scotttrade.

      --
      Do not look at laser with remaining good eye.
    17. Re:Failsafe Investing by Dunbal · · Score: 1

      5%? Over 4 years?

      --
      Seven puppies were harmed during the making of this post.
    18. Re:Failsafe Investing by Duradin · · Score: 2

      You might be interested in the lead, steel, and cordite portfolio if your tinfoil hat is on that tightly.

    19. Re:Failsafe Investing by Billly+Gates · · Score: 2

      Oh from the fact it was $300 an ounce not too long ago and it goes up to $1600! Why? Buy low sell high is what I pulled out of my anus. The whole gold thing reminds me of real estate investment. I have seen it before and seen family members lose their life savings flipping houses when the bill comes due and the rates reset.

      Once the recession recovers and people start buying stocks and bonds again the value of gold will plumbet. My father had a friend who in 1980 bought it and lost 80% of his money. Even if he held on today he still would not break even until it would hit $1800 an ounce after adjusting inflation.

      Gold is very volatile and inconsistent as it can go in either direction very very fast and takes decades to swing back. It wont hit $6000 my friend.

    20. Re:Failsafe Investing by trout007 · · Score: 1

      Whoops sorry about that. I mean the coupon rate is 5% not the yield.

      --
      I love Jesus, except for his foreign policy.
    21. Re:Failsafe Investing by cowboy76Spain · · Score: 1

      While the GP method looks like sound, I am out of stock market too. FTC, obscene bonus for corrupt and incompetent boards,.... At least if I put it in a lottery I know what I am playing too.

      Capitalists are trying hard to kill capitalism.

      --
      Why can't /. have a rich-text editor? Editing your own HTML is so XXth century.
    22. Re:Failsafe Investing by sjames · · Score: 1

      There actually appears to be a huge factor of luck involved, bolstered by "the club". Make enough and then it doesn't matter what happens. You can loose it all when statistics catch up with you and other investors will throw enough money at you to keep you going.

      For every Warren Buffet out there, there's a few thousand others just like him who weren't lucky enough to get the needed windfall to get started. That's not to say he isn't smart, he is. That's a prerequisite. Alas, it is necessary but not sufficient.

    23. Re:Failsafe Investing by xelah · · Score: 1

      I kind of agree with you. In reality, nobody can predict the market. But in practice, you don't need to. It's pretty easy to see a downtrend in the broad market, and when that happens you move from equities into bonds. And then when the market begins to trend upwards again, you do the opposite.

      If there's a trend then it's predictable.

      There have been many cases of useful predictability being discovered, although it doesn't always last long afterwards. It might involve, say, the end of the tax year or certain days of the week. I suspect, also, that you might find predictability if you can spot times when there's a cause for general changes in the level of saving. Think, for example, of Japanese insurance companies selling and repatriating investments after the earthquake, or retirement savings and withdrawal rates change with age profiles. Those are cases where you don't need to out-predict the future, you just have to be in different circumstances.

      I never understood this "diversify everything!" sentiment that plagues bank managers. It comes off as lazy, as no matter what 25% part of your portfolio (in the above example) goes up, another part will go down, since gold hedges stock and vice versa. You're always gaining/losing, hoping the gains outweigh the losses. How strange.

      Then you misunderstand its purpose. This is the simple textbook justification (look up CAPM for the complicated version): Image a market full of stocks. Imagine they're all basically similar: same average return (x), same variance (v), but their prices and earnings vary. Much of that variation is individual - they have a particularly good product idea, they suffer some disaster, whatever. Some of it is not. Some of the variation comes from market or economic conditions which affect all of them. IOW, each has a variance and they all have some covariance with the average of all the others. If you invest in one then your expected return is r and its variance is v. If you invest in all of them then your expected return is still r.but its variance is smaller. It's purpose is to give you the same expected return but at lower risk.

    24. Re:Failsafe Investing by petermgreen · · Score: 1

      It's not a glamorous way to acquire extra money but you're guaranteed to "earn" (save) that amount of interest.

      There are caveats though, for example if you lose your job you are likely to suddenly find it very hard to borrow money. So it may be safer to have a larger mortgate and some savings than a smaller mortage and no savings.

      --
      note: i'm known as plugwash most places but i screwd up registering that here somehow in the past and now can't register
  15. Regression Towards the Mean by barlevg · · Score: 1

    The article didn't say HOW WELL it "beat the market" (that is, what percentage return), nor does it say how it did on a day-to-day basis. So I'm treating "beat the market in its first month" as a single data point.

    We'll see how it does next month, and the month after that, and the month after that...

    1. Re:Regression Towards the Mean by MozeeToby · · Score: 1

      From the source of the source...

      [Twitter based trading] made 1.85 percent in its first month of trading, ending in July. This not only beat the S&P, which fell 2.2 percent that month, but it also beat out the average of other hedge funds, at 0.76 percent.

      So it's pretty significant. It's all based on a paper which showed that there's a 5-8 day lag in the correlation between Twitter sentiment and stock price. If something is getting negative attention on Twitter, there is a nearly 90% chance that it's stock price will drop ~1 week later with a similar relationship for positive attention. I imagine people hear something on twitter, make an appointment with their financial adviser or make a note, then a few days later actually do the trade based on the information they gathered. There's hardly anything illogical in basing stock trades on consumer sentiment, this is just a new way to gauge consumer sentiment in near real time.

      Keep in mind, this is a business where people make millions of dollars based on having information 10 ms before the competition.

  16. One month isn't much ... by PPH · · Score: 1

    ... but the idea of gauging a companies prospects by watching customer sentiments is quite valid. There have been a number of anecdotal cases (sorry, can't recall any links) about people (sometimes just kids) who have done well in stock market games just by walking through the shopping mall, looking for popular stores.

    Sure, there's got to be some due diligence. One has to weed out the outfits with great product ideas but crappy business plans. But everything boils down to customers and market. Find happy customers and you'll generally find successful businesses. The other variable here is consumer confidence. Not a judgment of a single business, but the willingness of people to go out and spend. Particularly for discretionary items. Twitter is probably as good a place as any to track social trends that affect these kinds of variables.

    --
    Have gnu, will travel.
  17. This will no longer work by maxwell+demon · · Score: 1

    Even if it worked and their success was not just random chance, it will now no longer work for the simple fact that now it's widely known. After all, Twitter isn't exactly a secret resource. People will start gaming the system, for sure.

    --
    The Tao of math: The numbers you can count are not the real numbers.
    1. Re:This will no longer work by maxume · · Score: 1

      I imagine competitive utilization of the information would have a bigger impact on the profitability of the scheme than data poisoning (because the information can be utilized with partial understanding of the system, whereas poisoning may not be effective without total understanding).

      --
      Nerd rage is the funniest rage.
  18. day trading vs fundamentals by roman_mir · · Score: 1

    IFF any of this is true, then this methodology maybe useful for day trading, quickly getting into market, quickly getting out of it, things like that. This is not for investments made based on understanding of market fundamentals. Of-course none of the advices that are given by main stream 'economists' and speculators have anything to do with fundamentals. If you want to invest and not day-trade, you have to understand the fundamentals, and to do this you cannot rely on anything that is considered main-stream, because main-stream is all completely off, it's all Keynesian in nature, most of it is about 'sentiment', so they are talking about feelings and things they consider to be 'fair' or 'unfair'. Hopes and feelings have nothing to do with the fundamentals, there you have to follow real economics, and it's Austrian, so for fundamentals look at Jim Rogers, Peter Schiff, Ron Paul, Max Keiser, Marc Faber, people like that. Why does it make sense? Well, consider that by understanding the fundamentals Ron Paul predicted where the US economy was going to (see my sig), Schiff predicted the Internet and Housing bubbles, same with Rogers (the guy made over 4000% profit in the last decade alone.)

  19. Sudden crash? by djlemma · · Score: 3, Insightful

    I wonder how the twitter fund is doing with the sudden 500 point drop in the Dow this morning...

    1. Re:Sudden crash? by medv4380 · · Score: 1

      The wild swings of late have more to do with computers being setup to do trading. They get new input then they start doing rapid wild trades which results in it down 500 one day then up 500 the next.

    2. Re:Sudden crash? by hosecoat · · Score: 1

      I wonder how the twitter fund is doing with the sudden 500 point drop in the Dow this morning...

      makes it a lot easier to beat the market..

    3. Re:Sudden crash? by schlachter · · Score: 1

      i wonder what will happen if people start tweeting about the twitter fund. Does it consider self reference? :)

      --
      My God can beat up your God. Just kidding...don't take offense. I know there's no God.
  20. Gaming the bot by ojintoad · · Score: 1

    Would love to see someone figure out how it works and get it to buy some crappy penny stock in order to dump it. What a great use of twitter spam.

  21. Blind luck? by Thu+Anon+Coward · · Score: 1

    As others pointed out,

    "This is absolutely brilliant because it tracks what the stock market is actually driven by, personal opinion"

    "The market itself is just the result of the combined emotional responses of investors"

    having gained and lost $250k in the stock market myself in the go-go dot.com days, I can look back with 20/20 hindsight and can categorically state that the market is just the herd instinct. Remember the Eddie Murphy/Dan Aykrody 1983 movie "Trading Places"? remember how the Duke brothers tried to corner the orange juice market? and then the other traders in the pit said "hey, let's get in on that action!"

    from wikipedia:
    "The story about the Dukes' cornering of the orange juice market was probably inspired by the "Silver Thursday" market crash of 27 March 1980, during which the Hunt brothers of Texas tried to corner the silver market and subsequently failed to meet a $100 million margin call."

    since they are tracking the herd mentality via social media, they will probably have more winning averages than not. time to take a closer look at their business model.

    --



    I'm good with numbers - .45, 7.62, 9.....
  22. now that we know... by l3v1 · · Score: 1

    ..we can influence their predictions by coordinated postings of a large number of targeted "mood" tweets

    and here goes your tweet-based prediction out of the window

    --
    I am putting myself to the fullest possible use, which is all I can think that any conscious entity can ever hope to do.
    1. Re:now that we know... by dkf · · Score: 1

      ..we can influence their predictions by coordinated postings of a large number of targeted "mood" tweets

      and here goes your tweet-based prediction out of the window

      Except you'll likely persuade lots of real traders that they've got to change their positions too, at which point you'll end up trampled by the stampede of mooing morons. That's the point when the rest of us will really laugh.

      --
      "Little does he know, but there is no 'I' in 'Idiot'!"
  23. Rephrased. by clinko · · Score: 1

    "A change in emotions expressed online would be followed between two and six days later by a move in the index, the researchers said, and this information let them predict its movements with 87.6 percent accuracy"

    Say What?:
    - "A change in emotions expressed online" (50/50)
    - "would be followed between two and six days later" (2-6 attempts)
    - " by a move in the index" (50/50)

    Rephrased:
    - Flip 2 coins, you'll get the same face 87.6 percent of the time, if you keep trying up to 6 times.

    I know i'm stepping into the Gambler's fallacy here, but does anyone want to expand on the coin analogy, i'd love to see it.

    1. Re:Rephrased. by ceoyoyo · · Score: 1

      You'd be correct, except that longitudinal data is positively correlated. Checking the market six times is not equivalent to flipping a coin six times. Also, presumably by "move" they mean a move relative to the original price, not the last time they checked.

  24. Of course Twitter is more powerful by John+Allsup · · Score: 1

    The mathematical models need access to a large number of independent human minds to effectively control the level of uncertainty exhibited by the stock market. Formal (and hence finitary) mathematical methods just cannot cope properly and reliance on them is usually the cause of stock market bubbles and crashes.

    --
    John_Chalisque
  25. The details by Ecuador · · Score: 1

    I am reading that the average hedge fund made 0.76% during the month, while this particular fund made 1.85%. Woohoo...
    One month is a ridiculously small amount of time to judge an investment strategy.

    --
    Violence is the last refuge of the incompetent. Polar Scope Align for iOS
  26. Baynesian Search by darkmeridian · · Score: 1

    I was reminded of Bayesian Inference, where experts make their best guesses along with probability limits. Twitter isn't exactly like that, but the stock market is driven by sentiment. People should buy low and sell high but they tend to buy high and sell low. ("Stocks are crashing! SELL! SELL SELL! Stocks are going up! BUY! BUY! BUY!") Measuring the mood of the crowd might be a good way to figure out the herd mentality and try to get some money out of it.

    Not saying it works, but that's probably the theory behind it.

    --
    A NYC lawyer blogs. http://www.chuangblog.com/
  27. Wisdom in crowds by DaveAtWorkAnnoyingly · · Score: 1

    I saw something on a BBC show called The Code. A guy walked around an office asking people how many jelly beans were in a big jar. Answers ranged from 40 to 80,000, when the actual answer was something like 1440. He asked 160 people, and when averaged, the final figure was 1445.

    There is wisdom in crowds. Specially regard the stock market, which it's the crowd sentiment that determines the stock price, not the value of the company.

    1. Re:Wisdom in crowds by waives · · Score: 1

      well dumbass, maybe you should go back to elementary school and learn some arithmetic.

      He gave you the average and the number of guesses averaged over, with those it is quite simple to recalculate the average with one guess removed.

    2. Re:Wisdom in crowds by black+soap · · Score: 1

      Algebra, you may have heard of it. (160*1445-80,000)/159. Turn in your nerd card, while we perform an audit of the office that issued it.

  28. I'm going to ... by lwriemen · · Score: 1

    ... tweet me a new minivan!

  29. Not surprising by Limburgher · · Score: 1

    Something that takes as it's input random psychological output from many sources does well at predicting the performance of a system that takes as it's input random psychology? Makes sense, actually. The stock market isn't always governed by rational decision making. What they seem to be attempting is to cut out trying to evaluate the rationality of people's though processes, but just observing them. The danger here is that if enough people behave stupidly, this thing might enhance that through it's transactions and the resultant feedback, but that's a danger of any system.

    --

    You are not the customer.

  30. Insider Trading by Culture20 · · Score: 1

    Not blind luck: Insider Trading. If Twitter's not a news source and is instead a "social medium" then you're getting hot tips from insiders somewhere in that mess.

    1. Re:Insider Trading by gblackwo · · Score: 1

      It's not XKCD but just as appropriate and obligatory! Dilbert, algorithms and insider trading

  31. Correlate the tweets with movements by petes_PoV · · Score: 1

    Does it count as "insider" trading if the same information is available to everyone?

    What would be interesting and extremely valuable (and open to manipulation, even by the tweeter if they became aware they were an indicator) is to come up with a "hot list" of people who's tweets had some sort of correlation with market movements. Whether you'd have to go further and demonstrate direct causality (maybe the CEO's children: we're going on a long cruise / no ski-ing holiday this year) would be an interesting question.

    If anyone could pull this off, they'd make a fortune until someone, somewhere made it illegal. I guess the trick would be to not tell people how you did it - though that WOULD lead to charges of insider trading.

    --
    politicians are like babies' nappies: they should both be changed regularly and for the same reasons
  32. Mood-ring Market Analysis? by geekmux · · Score: 1

    If an algorithm based on "mood swings", coupled to the utter crap that comes spewing out of Twitter 99% of the time, is being used to determine market investments, I don't know how that could speak any louder as to just exactly how ridiculous investment planning has gotten.

    Oh, and all you Wall Street professionals, you might want to start looking for a new job. Sounds like you were just replaced with Twitter. Yeah, I know, I'm as shocked as you are, your new boss is a hash tag. Don't worry though, you can always go into dart board sales, I'm sure we'll be using a lot of those next to predict futures.

  33. Not luck by wisebabo · · Score: 1

    While the market in the long-run does follow "Data", as a famous Economic Nobel Laureate said "in the long-run we're all dead".

    The long-run is, of course, made up of lots and lots of short runs. On a time-scale of days/hours/minutes/seconds (even micro-seconds now) the market looks brownian, or fractal, or like noise. As any serious trader knows it is emotions not logic that drive it in the (very) short-run. (Excepting purely quantitative imbalance corrections, sorry I forget the term).

    Consequently this result looks very interesting. If it really proves to be statistically significant, one can expect more and more traders using these sorts of algorithms. Perhaps real-time aggregate data like this WILL prove to be very valuable. As a previous poster mentioned, maybe this is Twitter's "Killer App". With more and more real-time social networks coming into play, what other sources of data might be useful? What will happen to the market if a substantial portion of trades is driven by sentiment driven algorithms? Will it become wildly unstable (like when some computer trading programs run amuck?). Or will it become very smooth with short-run sentiment merging seamlessly into long-run data?

    I wonder if this hedge fund is still open to new investors?

  34. Not at all surprising by SlippyToad · · Score: 1

    unbelievable that something cluttered with mundane musings and media links could have anything smart to say about the market

    The "market" is not some sort of magic Oracle. It is the result of the cluttered mundane musings and uninformed opinions of a teeming mass of people who are basically GAMBLING.

    I really wish people would get off this fetishism, near-worship of "THE MARKET." It is not infallible, and it is sure as hell not the answer to all of our society's problems.

    --
    One day I feel I'm ahead of the wheel / the next it's rolling over me / I can get back on / I can get back on
  35. Not Necessarily Luck by geoffrobinson · · Score: 1

    I interviewed at a Wall Street startup that was trying to do something similar. They test against historical data prior to buying and selling on the open market.

    I would assume they are doing the same thing. That said, one month is nothing.

    --
    Except for ending slavery, the Nazis, communism, & securing American independence, war has never solved anything.
  36. "I'm Pooping" by stevegee58 · · Score: 1

    I wonder what trades would be made based on that tweet...

    1. Re:"I'm Pooping" by SaroDarksbane · · Score: 1

      Waste Management?

  37. Silly by Time_Ngler · · Score: 1
    FTA:

    A change in emotions expressed online would be followed between two and six days later by a move in the index, the researchers said, and this information let them predict its movements with 87.6 percent accuracy

    So they make a prediction and then wait for up to 6 days for the market to go the way they predicted, and they only ran it for a month. Seems like random fluctuation to me.

  38. Beating the market isn't that difficult by Colin+Smith · · Score: 1

    You simply have to understand what money is. Most people don't understand and are deliberately misled by those who do, so that they can fleece them... You need a bag holder, the guy who buys at the top and sells at the bottom.

    I've been beating the market for several years because I understand exactly what's going on, where as most people seem to view life as a series of completely random unconnected events and are therefore continually caught by surprise.

    --
    Deleted
    1. Re:Beating the market isn't that difficult by Colin+Smith · · Score: 1

      4500. FTSE rather than the DOW.

      --
      Deleted
  39. Beat the market by the+eric+conspiracy · · Score: 1

    The market is stupid easy to beat, and there are lots of well established methods to beat it. One of the easy ways to do it is to buy a a distribution of index based mutual funds and bonds, and readjust every year to maintain that distribution.

    That will not only beat the market, but also beat 90% of all the other mutual funds.

  40. huh wha? by sgt+scrub · · Score: 1

    something cluttered with mundane musings and media links

    You described the pyramid scheme that is the stock market. Were you trying to describe twitter? Oh. I see. The ARE the same thing. My bad.

    --
    Having to work for a living is the root of all evil.
  41. In Tune with Austrian economics by Boona · · Score: 1

    Austrian economics teaches that value is subjective. It also advocates ordinal utility as opposed to cardinal utility. Now it's nearly impossible to know what everyone's subjective valuations and were it sits on their ordinal scale. But if people are discussing a product it means that's it's important to them, chances are that they place a higher value on it and place it higher on their value scale.

    The top-down approach hasn't served us too well when it comes to predicting so this bottom-up approach is actually kind of exciting. If they can get good at predicting the data, IMHO, this has real potential.

  42. emotion vs logic by Slash.research_Kat · · Score: 1
    well said...

    banking on the current "mood" means he's actually inflating the dangerous cycles of emotionally driven, short-term investment decisions rather than making any kind of long-term decisions.

    emotions might help make pretty good (and quick) decisions in the short term, but it's true, aiming for long term cannot depend on emotion. it has to be based on solid, concrete data. for example, i could choose to eat pepperoni pizza for dinner based on emotional responses to the smell. however if i had a goal of becoming vegetarian, i should not be choosing to to eat pepperoni even if it smells good.

    even if twitter feeds seem like real data, sentiment analysis is aggregating emotions of a crowd. Justin Bieber might be a 'hot trend' now but you cannot assume his popularity will remain for generations to come. Many fans like him for qualities that cannot be preserved for long (i.e. young face, young voice). Choosing stocks based on hard data is like admiring a singer for inherent qualities, like talent.

    --
    This is a research account for studying online commenting so we can create tools to improve moderation.
    1. Re:emotion vs logic by smellotron · · Score: 1

      Justin Bieber might be a 'hot trend' now but you cannot assume his popularity will remain for generations to come. Many fans like him for qualities that cannot be preserved for long (i.e. young face, young voice).

      In the future, Justin Bieber's youthful head will be preserved in a jar. Put atop a robot body, he may continue to woo stupid little girls and probably Fry.