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The instant a meaningfully profitable strategy is disclosed, quants incorporate it to their tools, which generates an arbitrage force that makes it less efficie
by fchollet 13y ago
The instant a meaningfully profitable strategy is disclosed, quants incorporate it to their tools, which generates an arbitrage force that makes it less efficient --and the strategy stops working right away.
I wonder if quants had noticed this kind of correlation prior to this result being published in Nature. I suppose yes, it's pretty basic after all (even Google have been promoting Google trends on their finance page as a heuristic for trading, so someone must have done a systematic study a while ago already)