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Re:Nanex Gets $700k Whistleblower Award from SEC by tptacek on Wednesday March 02, 2016 @06:10PM (#11213818)
Yes: if you, as an individual, place an order at an online brokerage, your order is most probably not going to make it to an exchange. It would be stupid to send it there, because wholesalers will give you better prices.

This is the case for retail orders, but not for trading firms. Prop trading firms don't tend to route their orders through wholesalers; they have deals with execution platforms (or implement their own) and route their orders to exchanges.

But there's a whole 'nother set of reasons why we're not especially concerned about competitions between prop trading firms on speed/latency/whatever: if they're impacted by HFT at all, they're competing in a zero-sum game to arb prices, and there's no moral reason why a slower trading firm is entitled to some equitable share of all the available profit from some arbitrage strategy.

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