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Re:Flash Boys a Year Later by fuzzywalrus on Thursday March 12, 2015 @12:19PM (#9191753)
"conclusion he starts with a trendy conclusion, HFT is bad"

I tried finding the Amazon review linked but didn't see it. While it seems that Lewis has a distorted view, there still hasn't been a compelling reason for HFT other than the exploit the edge cases and loopholes of the current system.

Re:Flash Boys a Year Later by toast0 on Thursday March 12, 2015 @01:25PM (#9192302)
Automated trading has reduced bid/ask spreads significantly (usually to the regulated minimum of one cent for popular issues). This is a compelling benefit for individual investors.

It has negatively impacted investors doing large trades, but those investors generally have more tools at their disposal to break their trades into smaller groups, or whatever. The major example impact I've heard is that the larger investors can't look at the order books at all the markets, and issue one order (to one exchange?) and take all the orders.

It seems that the automated players are duplicating their orders at multiple exchanges, and removing or replacing orders at other exchanges when one fills. A simple solution would be for the large investor to send individual orders to each exchange, and pace them so they arrive simultaneously at each exchange (instead of sending them simultaneously); of course, if you do that often enough, automated traders will probably put out smaller orders or do less duplication.

Re:Flash Boys a Year Later by harryh on Thursday March 12, 2015 @12:22PM (#9191778)
Automated trading has reduced trading costs hugely. You're flat out wrong.
Re:Flash Boys a Year Later by kbenson on Thursday March 12, 2015 @12:28PM (#9191822)
Doesn't it also add liquidity to the market? With many trades happening when the price fluctuates by fractions of a cent, doesn't that hone the market to a more accurate value quicker? Not to ignore the downsides, but my understanding is that there are known upsides.
Re:Flash Boys a Year Later by mmodahl on Thursday March 12, 2015 @12:34PM (#9191880)
Unemployed cab drivers are the only ones arguing self-driving cars are bad.