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- W67391210 abstract "Conventional estimates of the costs of taking liquidity in equity options markets are large. This presents a puzzle, which we resolve by taking seriously the implication of models of dynamic limit order markets that the bid-ask midpoint can be a poor proxy for the true value of a security, conditional on the occurrence of a trade. Changes in option prices can be predicted using publically available information, and a large proportion of option trades exploit this high-frequency predictability to take liquidity at low cost, buying and selling immediately before option prices are expected to change. Conventional measures of effective spreads and price impact do not account for this execution timing but can be adjusted to do so. For the average trade, effective spreads that take account of trade timing are one-third smaller than the conventionally measured effective spreads; for trades that reflect execution timing, they are four times smaller. Conventional measures of price impact overstate it by a factor of more than two. These findings have striking implications for the profitability of options trading strategies that involve taking liquidity. Our main results are robust to recent changes in option market structure." @default.
- W67391210 created "2016-06-24" @default.
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- W67391210 date "2015-01-01" @default.
- W67391210 modified "2023-10-06" @default.
- W67391210 title "Option Trading Costs Are Lower than You Think" @default.
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- W67391210 doi "https://doi.org/10.2139/ssrn.2580548" @default.
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