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A comment on Lessons learned building an ML trading system. Parent comment

Re:Lessons learned building an ML trading system by growse on Thursday November 28, 2019 @04:13AM (#21655733)
Before HFT, we had enormous spreads and expensive trades on many instruments in many markets.

Smaller spreads lower costs for everyone: institutional, retail etc.

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Re:Lessons learned building an ML trading system by perl4ever on Thursday November 28, 2019 @09:31PM (#21661549)
When exactly are you thinking of? Are you old enough to remember before decimalization? Do you consider that "enormous"?
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