Book: Flash Boys
Quotes of Book: Flash Boys
Every day, the markets were driven less directly by human beings and more directly by machines. The machines were overseen by people, of course, but few of them knew how the machines worked. He knew that RBC's machines-not the computers themselves, but the instructions to run them-were third-rate, but he had assumed it was because the company's new electronic trading unit was bumbling and inept. As he interviewed people from the major banks on Wall Street, he came to realize that they had more in common with RBC than he had supposed. "I'd always been a trader," he said. "And as a trader you're kind of inside a bubble. You're just watching your screens all day. Now I stepped back and for the first time started to watch other traders." He had a good friend who traded stocks at a big-time hedge fund in Stamford, Connecticut, called SAC Capital. SAC Capital was famous {and soon to be infamous} for being one step ahead of the U.S. stock market. If anyone was going to know something about the market that Brad didn't know, he figured, it would be them. One spring morning he took the train up to Stamford and spent the day watching his friend trade. Right away he saw that, even though his friend was using technology given to him by Goldman Sachs and Morgan Stanley and the other big firms, he was experiencing exactly the same problem as RBC: The market on his screens was no longer the market. His friend would hit a button to buy or sell a stock and the market would move away from him. "When I see this guy trading and he was getting screwed-I now see that it isn't just me. My frustration is the market's frustration. And I was like, Whoa, this is serious." Brad's problem wasn't just Brad's problem. What people saw when they looked at the U.S. stock market-the numbers on the screens of the professional traders, the ticker tape running across the bottom of the CNBC screen-was an illusion. "That's when I realized the markets are rigged. And I knew it had to do with the technology. That the answer lay beneath the surface of the technology. I had absolutely no idea where. But that's when the lightbulb went off that the only way I'm going to find out what's going on is if I go beneath the surface. book-quoteThen came the so-called flash crash. At 2:45 on May 6, 2010, for no obvious reason, the market fell six hundred points in a few minutes. A few minutes later, like a drunk trying to pretend he hadn't just knocked over the fishbowl and killed the pet goldfish, it bounced right back up to where it was before. If you weren't watching closely you could have missed the entire event-unless, of course, you had placed orders in the market to buy or sell certain stocks. Shares of Procter & Gamble, for instance, traded as low as a penny and as high as $100,000. Twenty thousand different trades happened at stock prices more than 60 percent removed from the prices of those stocks just moments before. Five months later, the SEC published a report blaming the entire fiasco on a single large sell order, of stock market futures contracts, mistakenly placed on an exchange in Chicago by an obscure Kansas City mutual fund. That explanation could only be true by accident, because the stock market regulators did not possess the information they needed to understand the stock markets. The unit of trading was now the microsecond, but the records kept by the exchanges were by the second. There were one million microseconds in a second. It was as if, back in the 1920s, the only stock market data available was a crude aggregation of all trades made during the decade. You could see that at some point in that era there had been a stock market crash. You could see nothing about the events on and around October 29, 1929. book-quoteAs they worked through the order types, they created a taxonomy of predatory behavior in the stock market. Broadly speaking, it appeared as if there were three activities that led to a vast amount of grotesquely unfair trading. The first they called "electronic front-running"-seeing an investor trying to do something in one place and racing him to the next. {What had happened to Brad, when he traded at RBC.} The second they called "rebate arbitrage"-using the new complexity to game the seizing of whatever kickbacks the exchange offered without actually providing the liquidity that the kickback was presumably meant to entice. The third, and probably by far the most widespread, they called "slow market arbitrage." This occurred when a high-frequency trader was able to see the price of a stock change on one exchange, and pick off orders sitting on other exchanges, before the exchanges were able to react. Say, for instance, the market for P&G shares is 80–80.01, and buyers and sellers sit on both sides on all of the exchanges. A big seller comes in on the NYSE and knocks the price down to 79.98–79.99. High-frequency traders buy on NYSE at $79.99 and sell on all the other exchanges at $80, before the market officially changes. This happened all day, every day, and generated more billions of dollars a year than the other strategies combined. book-quote
