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Futures Trader Arrested For Causing 2010 'Flash Crash'

New submitter dfsmith writes: Apparently the "Flash Crash" of the stock market in May 2010 was perpetrated by a futures trader in the UK. The US Justice Department alleges that he used a "dynamic layering scheme" of large-volume sell orders to confuse other buyers, hence winning big in his futures trades. "By allegedly placing multiple, simultaneous, large-volume sell orders at different price points—a technique known as 'layering'—Sarao created the appearance of substantial supply in the market. As part of the scheme, Sarao allegedly modified these orders frequently so that they remained close to the market price, and typically canceled the orders without executing them. When prices fell as a result of this activity, Sarao allegedly sold futures contracts only to buy them back at a lower price. Conversely, when the market moved back upward as the market activity ceased, Sarao allegedly bought contracts only to sell them at a higher price."

57 of 310 comments (clear)

  1. So? by Giant+Electronic+Bra · · Score: 5, Insightful

    This is just smart trading. I know 100 guys that COULD do this, assuming they had the requisite margin. As long as you place trades on the book that you're willing to fill based on the rules of that market there's no reason why you should be called a 'crook' for that.

    --
    "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    1. Re:So? by Paleolibertarian · · Score: 5, Insightful

      Market manipulation is only legal when the big banks do it.

    2. Re:So? by QuasiSteve · · Score: 5, Informative

      I'm far from a lawyer, but:

      As long as you place trades on the book that you're willing to fill

      The 'willing to fill' part might be key - as he had no intentions of filling the orders that led to the mini-panic, using them solely to affect the price for personal gain.

      Defendant willfully and knowingly, having devised and
      intending to devise a scheme and artifice to defraud, and for
      obtaining money and property by means of false and
      fraudulent pretenses, representations, and promises
      , did
      transmit and cause to be transmitted by means of wire
      communication in interstate and foreign commerce,
      writings, signs, signals, pictures, and sounds for the
      purpose of executing such scheme and artifice.

    3. Re:So? by Anonymous Coward · · Score: 5, Insightful

      Indeed. This man's only crime was being small enough to prosecute.

      If one man manipulates the market, he gets arrested.

      If a large firm manipulates the market, the're a titan of wall street and get to have dinner with congresscritters.

    4. Re:So? by khallow · · Score: 5, Insightful

      What they were doing was so blatantly illegal

      It wouldn't be, if spoofing weren't a crime. The US could have simply not made it a crime in this case and then it wouldn't be "blatantly illegal" for small traders to do.

      And notice how the problem is due to poor market design. Instead of fixing markets so that it isn't possible to "cancel before execution", they implement ridiculous rules and laws instead.

      Consider this analogy. How many people here think it's a good idea to modify US law just to protect the *IAA business models? So why is it acceptable to modify US law just to protect stock market business models?

    5. Re:So? by TsuruchiBrian · · Score: 4, Insightful

      It sounds like it's a flaw in the NYSE and similar exchanges as well as greedy HFT algorithms. It seems like fixing these flaws is far more important than just arresting people who exploit them.

      Who was actually harmed by this crash? A bunch of wall street speculators running computer programs to trade faster than regular people. Who gives a shit. If anything, it exposes the vulnerability so it can be fixed.

      It's entirely possible to have an exchange where there is no unfair advantage given to people who have paid for faster access to trade offers. But this is the system Wallstreet wants, and I can't say I feel bad when crooks get cheated.

    6. Re:So? by forand · · Score: 2

      While I agree with your premiss this is exactly what high frequency traders do constantly. This is how they "test the waters" so to speak. The only difference here seems to be the volume of the trades. Money Ball has a reasonable overview of the HFT practice.

    7. Re:So? by NicBenjamin · · Score: 3, Interesting

      How do you know a guy who wrote 30 checks on an account with $0 in it didn't intend to deposit enough to cover the difference?

      You don't really. But in the US Legal system enough circumstantial evidence will overcome reasonable doubt every time. And if this guy made loads of money off a crash caused by these tactics, and then continued to use the same damn tactics for years and years, it's really hard to believe it was an accident.

    8. Re:So? by AuMatar · · Score: 5, Interesting

      So lets say I have a standing order to buy FooBar stock at $50 a share. Its current price is $55. So basically I'm looking to buy on dips.

      Tonight it comes out that the CEO has been falsifying all financial reports, and instead of making money for the last 3 years they've lost millions. You don't think I should be able to cancel that buy order due to the new information?

      --
      I still have more fans than freaks. WTF is wrong with you people?
    9. Re:So? by Anonymous Coward · · Score: 3, Insightful

      I don't think anyone's suggesting that your orders should sit there forever.

      What would seem reasonable is that there should be a minimum delay between submitting an order and cancelling it (or even submitting it and having it appear on the market), and that delay is of the order of 10ths of seconds rather than nanoseconds as is currently the practice of HFTs.

      A very easy way to achieve that is to put a great big loop of wire (i.e. several km minimum) between every brokers' order entry systems and the exchange's live market systems, such that there's an appreciable delay between the broker entering their orders and them appearing on the live market. If everyone's orders are forced to go through that big loop of wire before they hit the market, the opportunity for the few to frontrun the orders of the many is massively reduced.

    10. Re:So? by barc0001 · · Score: 5, Insightful

      Read Flash Boys. There is an absolute metric fuckton of orders that are generated each day that are not intended to be fulfulled and are purely there to manipulate pricing.

    11. Re:So? by ultranova · · Score: 3, Insightful

      You don't think I should be able to cancel that buy order due to the new information?

      No, you shouldn't. You tried to profit from random events going your way, so now you just have to deal with the fact that your lottery ticket was empty.

      --

      Forget magic. Any technology distinguishable from divine power is insufficiently advanced.

    12. Re:So? by zidium · · Score: 5, Insightful

      A more fair way would be to levy a $0.01 tax on every open position. And $0.01 on every position close. This would make HFT unprofitable instantly.

      --
      Slashdot Valentines Beta Massacre: iT WORKED! The boycotts killed Beta!!
    13. Re:So? by Paleolibertarian · · Score: 2

      Any skillful trader would also have a stop loss order in place in case the price moves against him. That's the price you pay for being in the market to begin with. Stocks are risky which is why the profit potential is so great. If you don't stay on top of things you lose.

    14. Re:So? by jklovanc · · Score: 2

      The only difference here seems to be the volume of the trades.

      Which crossed the line between normal practices and manipulation.

    15. Re:So? by sjames · · Score: 2

      You should be able to cancel whatever part hasn't already been paired with a matching sell order. But once it gets paired up, it's yours.

    16. Re:So? by sjames · · Score: 3, Insightful

      There's your answer. He did exactly what they do, but did it cleverly enough to remove the speed advantage. As a result, the money flowed the 'wrong' way and so Wall Street's pet investigators must put a stop to it.

    17. Re:So? by Jack+Griffin · · Score: 2

      I can't see why the stock market has to be in real time. Is there any advantage to genuine investors in having millisecond transaction times? Why not take orders in real time, but only execute them each hour on the hour? Seems like this would still allow for genuine trades while keeping the ratbags at bay.

    18. Re:So? by MatthiasF · · Score: 2

      Um, producing trades that you do not intend to act on to manipulate prices is literally fraud and illegal. This will never be legal, nor should ever be legal.

      The laws aren't written specifically for the stock market, this is a general principal upheld by any type of market.

    19. Re:So? by Giant+Electronic+Bra · · Score: 3, Interesting

      Yeah, but I work in this field, and I can tell you that MOST bids and offers aren't acted on, and MOST of them are far 'off the money'. HOWEVER, every single bid or offer placed upon the market, and the CME surely counts, is financed. You simply cannot put a bogus order onto the CME, the NYSE, or even the most rinky-dink ECN. So, the question remains "so what?", the man's money was where his mouth was, and its up to other people to decide what to buy or not buy.

      The real point is, there's no clean line here. Normal market activity consists of trying to get other people to buy high and sell low so you can do the opposite. Its a zero-sum game and you cannot point to one bid or offer and say "that's fraudulent" and another essentially identical one and say it isn't. I mean I've literally traded the E-Mini on the CME, just like this guy did. Our algos put in multiple orders at multiple price levels and pegged them a few pips off the BBO. How is it that my order flow is legal, but his almost indistinguishable one isn't? I think there's about a snowball's chance in hell they can show he did anything criminal. I mean its possible, there could have been other activities that crossed certain lines, having insider information of some sort, etc, but just placing orders on a market? I defy any prosecutor to make a case that such a thing is criminal.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    20. Re:So? by Giant+Electronic+Bra · · Score: 2

      Yeah, neither am I. I have a partner who's a Series 7 FINOP/ROP, and licensed with the NFA, CFTA, and FINRA. I'm sure if I ask him he'll give a rather definitive answer. I know from experience what it is likely to be though, which is basically that the big players are all scum and the only reason this guy is in trouble is because he stole candy from the town bully, not because he did anything they don't do on a daily basis. As I've said in other posts though, there COULD be specific illegal acts, using inside information of some sort, collusion with other traders, front running of some form (if his money came from investors), or falsifying regulatory reports to his SRO (CFTA most probably).

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    21. Re:So? by jbengt · · Score: 2

      So lets say I have a standing order to buy FooBar stock at $50 a share. Its current price is $55. So basically I'm looking to buy on dips. Tonight it comes out that the CEO has been falsifying all financial reports, and instead of making money for the last 3 years they've lost millions. You don't think I should be able to cancel that buy order due to the new information?

      You're missing the part where he cancelled after having his offer accepted, and did so repeatedly, with no intention to sell, until he drove the price enough to make stacks of cash from futures.

  2. Simple solution... by TWX · · Score: 2

    ...make people, not computers, buy and sell.

    It'll never happen, but given that it may be hard to convince a jury that the DoJ's claim is true due to the technical nature of the 'crime', I don't see how it's going to improve when commodities and stock traders can manipulate the markets simply through the act of offering to buy and sell.

    --
    Do not look into laser with remaining eye.
  3. So was it illegal? by Irate+Engineer · · Score: 2, Interesting

    So was it illegal to do this? They use the word "scheme" hoping people will mentally prefix it with "Ponzi" in their minds to make it sound illegal, but was it? Sounds like he was being clever and making money - ain't that the whole point of trading?

    --

    Left MS Windows for Linux Mint and never looked back!

    Vote for Bernie in 2016!

    1. Re:So was it illegal? by WolfWithoutAClause · · Score: 2

      Outwitting other bots isn't a crime, but market manipulation is.

      You're not allowed to run prices down, purely to get them on the upswing.

      And that's specifically what he seems to have been doing.

      This isn't a technical problem, it's an ethical problem. The markets aren't there for this sort of thing, they're primarily there to fund businesses.

      --

      -WolfWithoutAClause

      "Gravity is only a theory, not a fact!"
    2. Re:So was it illegal? by mbone · · Score: 2

      My point is - would anyone have cared if he didn't trigger a 1000 pt market slide?

      There are lots of things you can get away with, as long as you don't cause a panic and make the evening news.

    3. Re:So was it illegal? by no-body · · Score: 5, Funny

      ...The markets aren't there for this sort of thing, they're primarily there to fund businesses.

      You are making me laugh - the joke of the day!
      Mark parent up as funny!!

    4. Re:So was it illegal? by tnk1 · · Score: 2

      I don't know, it sure is driving up real estate prices near the exchanges, buying up high powered computer equipment and networking, employing coders, mathematicians, network engineers, and etc.

      Oh you meant, how is it funding the businesses whose stock is being traded?

      Not at all. Unless those businesses happen sell services to HFT houses, of course.

      That said, the market develops these various services/parasites because it serves a real purpose, mitigating the risk of the initial primary risk of investment in a company's stock. Combining a set of stocks in a basket can even out the risk, for instance. That basket then has its own characteristics and risk, which might be mitigated in a different way.

      All of that is a meta-game which has nothing to do with the business behind the stock and everything to do with what you can do with instruments that have an variable value and their own characteristics.

      It is unclear how HFT helps anyone, and frankly, it feels more than a little abusive, especially if it can take out the rest of the market in an escalating arms race of faster trading and even lower ethical values than an already pretty ethics-free environment. It now feels like they will get to a point where their trades are actually so fast that they will no longer actually act on data, and become expensive, very fast, but approach randomness.

      That does not mean, however, that HFT serves no valid purpose, and there are suggestions that it adds liquidity to the market or something. The problem is that the automatic and high speed nature of the trading algorithms magnifies errors and allows fraud like this to get out of hand, so any positive value may be marginal or even overcome by negatives.

    5. Re:So was it illegal? by NicBenjamin · · Score: 4, Interesting

      You can buy a penny stock. You have a First Amendment right to talk it up on penny stock forums. You can then sell for a profit. No single step is illegal. But if the police prove you intended to pump and dump it you have committed a crime. The whole process, taken together, is a crime if they prove you were trying to convince a bunch of idiots to do something stupid (ie: buy your $.05 penny stock for $0.25) that a) cost them money while b) earning you money. You manipulated the market for your personal gain, and that's bad.

      This guy made a series of perfectly legal moves that had the effect of a) costing a bunch of idiots to lose money in the Flash Crash while b) he gained money.

    6. Re:So was it illegal? by NicBenjamin · · Score: 2

      Seems a big mistake to hinge this on intent. It needs to be clear what actions are punishable, not what state of mind.

      Almost all financial crime is intent. You have the right to write a check on an account that has no money in it if you intend to put money in it by the time the check gets to the bank in a few days. If you fail to do so because something stopped you (ie: you get hit by a bus on the way to the bank and go into a coma) you have committed no crime. OTOH if you failed to do so because the original check was a lie you've committed a bunch of crimes.

    7. Re:So was it illegal? by Fnord666 · · Score: 2

      A HFT trader uses his knowledge of market conditions (ie: Royal Bank of Canada just placed a major buy order for GM that will jack up the price) to profit. He doesn't try to change the price of anything, he just uses his superior knowledge of what the price is going to do to make a buck.

      So how is that not considered insider trading? Or is the GM buy order public knowledge but most people don't have the ability to take advantage of it during the millisecond window?

      --
      'The tyrant will always find pretext for his tyranny.' - Aesop's Fables
  4. Re:A Sympton of the Problem by rickb928 · · Score: 2, Insightful

    That's stupid. You only need to delay settlement by seconds, force the buyer to hold for 6 minutes, and the HFT system is broken.

    Or you could levy a truly minimal transaction tax, even processing fee for orders executed in than 250ms from offer to buy to re-offer... Maybe.

    But thinking you should force holding stock for days means you need to suspend trading when any news breaks. Which halts the market.

    Just slow HFT by milliseconds.

    Oh, and audit brokers. If they persist in offering stock they actually don't have, perhaps that's a problem? This whole episode sounds like NASDAQ, except they seem to have the stock.

    --
    deleting the extra space after periods so i can stay relevant, yeah.
  5. Re:Allegedly by jklovanc · · Score: 2

    It has yet to be proven in court so it is "allegedly".

  6. Re:A Sympton of the Problem by rtb61 · · Score: 5, Insightful

    Perhaps, just maybe perhaps, something that is inherently broken should be broken. As a means by which to increase the prices of commodities, not to the benefit of producers or to the benefit of end consumers purely to create an artificial point by which disgusting individuals can insert themselves into the transaction and claim that price increase as profit for doing nothing other than speculating and seeking purposefully manipulate the price. It ain't stupid to try to eliminate the current commodities pricing scam.

    --
    Chaos - everything, everywhere, everywhen
  7. Market Making by Neo-Rio-101 · · Score: 3, Insightful

    This is basically what Market Making is: Creating a bunch of pending orders that are never triggered to push the market away and into the direction they want.
    Only the biggest players on the block can get away with doing this because they have billions in equity.... such as the largest 12 banks on the planet.

    Always good to know that the value of all our commodities and currencies are controlled by them on a whim, isn't it?
    Also good to know that they make money by default and can't really lose the game.

    Go back to sleep everyone. Nothing to see here...

    --
    READY.
    PRINT ""+-0
    1. Re:Market Making by edtice1559 · · Score: 2

      This is hardly what market making is. Market makers have *more* legal responsibility than average traders. A market maker must *always* have a bid and ask price showing and they *must* buy or sell at these prices even if it costs them large sums of money. Market making is like a reverse lottery. Usually you make a few dollars on the spread. But you can lose big. Some people use the term "market maker" loosely as you probably are here. But what you are seeing here is a form of market manipulation.

  8. Re:A Sympton of the Problem by edtice1559 · · Score: 2

    Brokers are supposed to offer stock they don't have. In many cases, they are legally required to do so. They have to offer to sell even if they hold no shares. This makes them "naked short." They have to run out and buy the securities before the price moves or they will lose their tail so to speak.

  9. Meanwhile US fugitive bankers in Switzerland by WillAffleckUW · · Score: 4, Insightful

    Easily tracked and easily identified US "fugitive" bankers who caused the crash and have Interpol warrants for their arrest are living high and mighty in Switzerland meanwhile.

    (sources: Bloomberg, WSJ, and Marketwatch)

    So can we actually believe this "person responsible" is not just a sacrificial lamb who will end up pardoned anyway, without doing any actual jail time?

    Just saying.

    --
    -- Tigger warning: This post may contain tiggers! --
  10. Re:The FBI have a hair sample that matches the UK by WillAffleckUW · · Score: 2

    We know this UK guy did it cause the FBI found one of his hairs at the scene of the market crash.

    I think they found one of his heirs at the scene.

    --
    -- Tigger warning: This post may contain tiggers! --
  11. UK citizen arrested in the UK for breaking US law? by Andy_R · · Score: 2

    Why does the US have jurisdiction here?

    --
    A pizza of radius z and thickness a has a volume of pi z z a
  12. Re:A Sympton of the Problem by David_Hart · · Score: 4, Insightful

    That's stupid. You only need to delay settlement by seconds, force the buyer to hold for 6 minutes, and the HFT system is broken.

    Or you could levy a truly minimal transaction tax, even processing fee for orders executed in than 250ms from offer to buy to re-offer... Maybe.

    But thinking you should force holding stock for days means you need to suspend trading when any news breaks. Which halts the market.

    Just slow HFT by milliseconds.

    Oh, and audit brokers. If they persist in offering stock they actually don't have, perhaps that's a problem? This whole episode sounds like NASDAQ, except they seem to have the stock.

    The argument by HFT traders is that reduces the liquidity and efficiency of the stock market.

    They are right in the effect. However, you never see anyone take it to the next step. Do we NEED to market to be THAT liquid?

    I, personally, think that the market is currently too liquid if flash crashes can that easily take place on fake orders. It means that the HFT programs are reacting even before the trades have been completed. I agree that they need to be slowed down.

  13. Re:My Suggestion by omfgnosis · · Score: 2

    The risk of investment on the scale of the stock market isn't borne only by the investors. Manipulation gone wrong can destroy economies. Most of the regulation that exists is a reaction to catastrophic losses felt far outside the stock market. It simply isn't reasonable to claim that the problem is overregulation, or that less regulation promotes educated investment or self-policing.

  14. Re:My Suggestion by NicBenjamin · · Score: 2

    We've tried this before.

    It resulted in huge swings in the market (because scam artists could get away with all kinds of shit), that resulted in major harm for ordinary people because their boss gets his capital from the capitalists on either the stock market or the bond market, and if he can't do that he has to fire you, which means you buy less food, etc.

    The panic of 1873, which bore the title "Great Depression" before the one of the 30s, was caused partly because Austria-Hungary's barely regulated stock market collapsed. In the US the problem was that investors got wind of a bank's impending bailout by the treasury before the bail-out could actually happen.

  15. Playing the market .. by DougPaulson · · Score: 2

    Sounds like he was doing exactly the same as the big players. Making bogus orders to promote a false value in a 'product', waiting for a large rush of buys, then selling before anyone else had time to respond. Exactly the same as the big players, except he didn't bribe the requisite politicians or have the requisite friends at the SEC.

  16. Re:Allegedly by gl4ss · · Score: 5, Insightful

    well allegedly they're not even certain why it would be illegal for him to have done so.

    the real problem isn't his tactic.. it's the way the markets allow for robo traders in the first place. if it was legal for him to do algorithmic trading, why this algo was illegal?

    --
    world was created 5 seconds before this post as it is.
  17. Re:Allegedly by knightghost · · Score: 2, Insightful

    Same reason for all DOJ cases - Marketing and Politics.

    Futures and Shorts may stabilize markets in the short term but they are an incredible drain on long term investments.

  18. wrong arrest by Tom · · Score: 2

    The real people to throw in jail are the ones who made it possible. The guys who deregulated the markets so much, the ones in oversight of the finance system who didn't see these things approaching and the people who dissolved all the protections of the real economy against the finance market because they were greedy for quick bucks.

    Politicians, mostly, but we should also go after the lobbyists and their employers who influenced them.

    Of course, that will never happen. Society rarely becomes self-conscious enough to get rid of its parasites.

    --
    Assorted stuff I do sometimes: Lemuria.org
  19. Re:Allegedly by Anonymous Coward · · Score: 3, Interesting

    Because the complaint is ridiculous, that's why.

    It describes actions that are common practice among Wall Street's biggest banks and trading desks.

    Let's remember that to date, no one has done jail time for rigging LIBOR. A crime that is exponentially more serious than this one.

    When you're committing crimes for a megabank, your chances of seeing a prison cell are essentially zero.

  20. Re:Allegedly by jklovanc · · Score: 2

    it even describes layering as something that "was" sort of an industry standard practice.

    How does having a name make it an industry standard practice? "Ponzi scheme" has a name too and it is illegal. I don't see and reference to "layering" being standard practice.

    is it strange to ask for a facility into hft that would cancel unprofitable trades?

    He cancelled trades that would have been profitable but that he had no intention of fulfilling. He created a large volume of sell offers just above the market price knowing that no one would buy them but that it would make it appear that there was a lot of supply. That drove down the price. He then lowered his offers to keep just above. By the volume and the pattern he was manipulating the futures.

  21. Re:UK citizen arrested in the UK for breaking US l by IamTheRealMike · · Score: 2

    The issue is that making and cancelling orders on a market is not traditionally seen as financial fraud.

  22. Re:Allegedly by wonkey_monkey · · Score: 2

    Yes, but you don't have to repeat it five times in a single paragraph.

    Yes, you do, if you're the Department of Justice.

    I would think that whoever is in charge of press releases for the DOJ would be at least be competent at writing.

    They are competent, but they also have to be acutely aware of not stating as fact something which they have yet to prove in court.

    --
    systemd is Roko's Basilisk.
  23. Re:Allegedly by Anonymous Coward · · Score: 3, Insightful

    In other words he was using the system to make money. But because he's not one of the big players they're all crying because a little guy got in on their action.

  24. Re:Allegedly by gbjbaanb · · Score: 4, Insightful

    so the crime he was committing was making money for himself instead of for Goldman Sachs.

    I think it tells us everything we need to know about how corrupt our society has become.

  25. Scapegoat by moeinvt · · Score: 2

    This is ABSURD! He's being singled out because the federal government has granted blanket immunity to the big financial firms and their employees. I guess he didn't bribe the right politicians and didn't provide enough job offers to federal bureaucrats.

    Yes, placing orders that you never intend to execute is technically illegal, but the big financial firms that engage in HFT do this crap every f***ing day! Pick a random trading day in the last year and subpoena the order history of a big trading firm. I guarantee that there will be thousands of orders submitted and canceled in milliseconds. Orders which the firm obviously had zero intention of ever executing. Exactly the sort of activity they are calling "criminal" in this one particular case. The U.S. government is a monstrosity. Arbitrary enforcement of the law is a hideous injustice and it's standard procedure in government.

    If I was a senator I'd be grilling the AG nominee about this selective enforcement BS.

  26. Re:Allegedly by monkeyzoo · · Score: 2

    the real problem isn't his tactic.. it's the way the markets allow for robo traders in the first place.

    Yeah. It's the robo algos that sent the market into the flash crash as a result of this guy's trading. If he had taken his trading plan and implemented it as an algorithm to do the same thing, he probably could have just called it "arbitrage" and been scott-free.

  27. You cannot do that by Giant+Electronic+Bra · · Score: 3, Interesting

    The CME, and EVERY SINGLE OTHER trading venue in existence, requires guaranteed credit before you trade. You simply CANNOT place an order for E-Mini on CME and not be able to make good on it if your bid/offer is accepted. Thus there is no such thing as 'kiting'. Broken trades are VERY rare and if you do break one, there's an investigation and serious penalties are in order. Generally speaking there's someone with the available credit to make the counterparty whole.

    So, this Sarao guy for instance, would have been going through someone, say RCG, who is an FCM (Futures Commission Merchant) where he would have say $1 million on deposit. RCG would offer him say 100:1 margin, so he'd make positions as large as $100 million, and if at any point his unrealized P&L grew to close to his $1 million they would call his position and he'd be busted out. At the end of the day he pays RCG some interest on whatever margin he actually used and keeps his profits on whatever he made trading his $100 million in buying power. At NO POINT will RCG ever allow him to be in excess of his credit limit or underwater, and they are regulated and thus guaranteed to have sufficient risk capital to cover any shortfall with the counterparty to any trade on CME. ALL Sarao's trades will be 'given up' to them, or else placed directly through their platform (Onyx 2 I believe currently) and placed by RCG on its omnibus accounts.

    The point is, you can't place trades you can't back up, its simply impossible.

    --
    "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
  28. Re:Loss of liquidity by Rich0 · · Score: 2

    Then the cost of price discovery will go up significantly.

    Define "significantly."

    Do we really need nanosecond resolution on stick price changes?

    Do fluctuations at those levels REALLY reflect changes in the actual value of a company? At 4:01.000000001 PM is GM really worth 14.01, but at 4:01.0000000012 something changed and it is now worth 14.02? And what is the cost of having this "extra resolution?"