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A comment on Behind the Market Swoon: The Herdlike Behavior of Computerized Trading. Parent comment

Re:Behind the Market Swoon: The Herdlike Behavior of Compute... by steventhedev on Wednesday December 26, 2018 @11:35AM (#18762965)
Because your portfolio is neutral in terms of the market/sector, but not on individual options. A good place to start is to read up on statistical arbitrage.
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