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Faculty & Research

Bias in the Effective Bid-Ask Spread - Bjorn Hagstromer

03 Oct
2019
2:00 pm
Jouy-en-Josas
English

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2019-10-03T14:00:00 2019-10-03T15:15:00 Bias in the Effective Bid-Ask Spread - Bjorn Hagstromer Finance Speaker : Bjorn Hagstromer Buil. T - Room T104 Jouy-en-Josas

Finance

Speaker : Bjorn Hagstromer

Buil. T - Room T104

The effective bid-ask spread measured relative to the spread midpoint overstates the true effective bid-ask spread in markets with discrete prices and elastic liquidity demand. The average bias is 18% for S&P 500 stocks in general, and up to 97% for low-priced stocks. Cross-sectional bias variation across stocks and trading venues can mislead stock selection and order routing decisions. The bias also undermines liquidity timing and trading performance evaluations, and can lead to that non-sophisticated investors overpay for liquidity. To overcome these problems, the paper proposes new estimators of the effective bid-ask spread.

 

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2019-10-03T14:00:00 2019-10-03T15:15:00 Bias in the Effective Bid-Ask Spread - Bjorn Hagstromer Finance Speaker : Bjorn Hagstromer Buil. T - Room T104 Jouy-en-Josas