Earlier quoted context omitted.
eh, there's not much evidence that HFT increases volatility. I work in HFT and in general, HFT decreases volatility. Of course the flash crash is a notable exception, but that would never happen today.
My intuition also says HFT should usually decrease volatility. Why would a flash crash never happen today?
Re: When You Win a Nobel and They Can't Reach You at Home
#241I would assume that they are referring to the circuit breakers. I wouldn’t consider that fully “fixing” flash crashes.