Friday, June 17, 2016

The startup trying to clean up Wall Street just became an official stock exchange – The Verge

This evening the Securities and Exchange Commission approved an application by a startup called IEX to become a full-fledged stock exchange. By approving IEX, the SEC was giving its stamp of approval to one of the most high-profile challenges to the current Wall Street regime. Co-founded by a Canadian trader named Brad Katsuyama, IEX is designed to be a market free from high-frequency traders who use their speed to skim profits off the orders from ordinary citizens.

The company, and Katsuyama in particular, rose to prominence as the stars of Michael Lewis' best-selling book, Flash Boys. Lewis argued that modern markets were rigged, allowing high-frequency traders to pay for fast access and use that speed to front-run other traders. As a trader, Katsuyama dealt with the problem first hand. He would place a bid for a stock at a price he saw listed, and then find there were no shares available at that price. "They could detect my order at BATS, race me to the next exchange, and cancel their sell orders while buying whatever is left, then turn around and try and sell stock back to me at a higher price," said Katsuyama.

Katsuyama and his team devised a speed bump to block these kinds of tricks. At a time when everyone was getting faster, IEX decided to get slower, delaying each trade by 350 millionths of a second, a fraction of the time it takes to blink your eye. No human would notice the difference, but it was enough to throw off systems that were trying to read and then outrun buyers. Suddenly, when Katsuyama went to purchase shares, he no longer found them purchased and flipped back at a higher price. "We solved the problem. We have a product."