The exchanges like it when there's thousands of trades a second but is that good for markets?'

摘要

I can't speak for the FBI. I know the press reports just like everybody else that the Syrian Electronic Army took credit for it. But I can tell you with regard to the markets what happened is a lot of traders, particularly these high-frequency traders, who I call cheetahs because they are so fast, go after markets when there's volatility, when there's something that we call "ignition momentum." They don't care if the market's going up or the market's going down. In this case, it went down, then it went right back up. That's when the cheetahs feed. Unfortunately, a lot of average investors had things like stop-loss provisions where they just got out of the market when prices went down, and never got back in. They're out money.