alt Hacker NewsOne other aspect of HFT that is good for the general investor is that HFT injects liquidity, making it easier for a general investor to liquidate their position, which is a desirable thing for human traders. HFT does not magically make human investors engage in more or less speculative behavior.
HFT is an easy thing to attack, but I've never encountered a lucid argument for why it's bad. "It's not fair that I'm not as fast" isn't really a reason unless you explain why removing liquidity (i.e., making it harder for you to find a buyer at your price point), paired with you moving up the "trading swiftness" rankings, is preferable.
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the common argument against it is that it guarantees a technological arms race and by those conditions pushes the smaller groups out of the competition.
it's unfair in the same vein that the rich are always offered better loan rates than the poor. Yeah, it's obvious why that would be, but it's not fair either.
although imo pushing small-backer arbitrage out of the equation is a good thing.
Why do we encourage microsecond scale HFT and tout its virtues, yet shut the market down for the majority of every day?
Why not go all the way and have markets running 24/7/365?