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by sparsely 799 days ago
The HFT is wasteful but isn't bad for human traders, they tend to get better prices. It's bad (sometimes) for huge investors (VHNW individuals, hedge funds, pension funds which I guess represent regular people) that want to make large trades without moving the market but there are also winners here - e.g. if Johnny the day trader buys a stock that Texas Teachers Fund is selling huge batches of, he's better off if HFTs are causing price changes to propagate more quickly.