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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?"

18 of 209 comments (clear)

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

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

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  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).

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    2. 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.

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    3. 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.

    4. 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.

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

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

  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 spuke4000 · · Score: 2

      Sir, I would like to buy your monkeys.

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    2. 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.

  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.

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  5. Limitless by rwven · · Score: 2

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

  6. 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.

  7. 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...

  8. 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.

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  9. 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.

  10. 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.