Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?
This is your opportunity to ask questions. No question too simple or too silly.
Culture war topics are accepted, and proposals for a better intro post are appreciated.
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Notes -
if you are interested in some defenses of HFT's social value, here it is, from the horse' mouth. and even if you don't buy any of that, realize that it's a very small industry. the number of particle physicists being stolen away is absolutely miniscule.
hedge funds and commodity trading are a quite different thing - efficient price discovery is good, actually.
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