automated high frequency trading also does the important work of eliminating the question "Which exchange should I buy AAPL at?" HFT is mostly ultra-fast arbit

automated high frequency trading also does the important work of eliminating the question "Which exchange should I buy AAPL at?" HFT is mostly ultra-fast arbitrage programs, and the benefit of using them far outweighs the downsides. Maybe the problem is not with HFT but in the industry as a whole