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An Investigation of Market Microstructure Impacts on Event Study Returns

An Investigation of Market Microstructure Impacts on Event Study Returns ABSTRACT We investigate the importance of bid‐ask spread‐induced biases on event date returns as exemplified by seasoned equity offerings by NYSE listed firms. We document significant negative return biases on the offering day which explain a large portion of the negative event date return documented in the literature. Buy‐sell order flow imbalance is prominent around the offering and induces a relatively large spread bias. If order imbalances are suspected, the researcher can use returns calculated from the midpoint of the closing bid and ask quotes instead of returns calculated from closing transaction prices to avoid this return bias. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Finance Wiley

An Investigation of Market Microstructure Impacts on Event Study Returns

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References (34)

Publisher
Wiley
Copyright
1991 The American Finance Association
ISSN
0022-1082
eISSN
1540-6261
DOI
10.1111/j.1540-6261.1991.tb04629.x
Publisher site
See Article on Publisher Site

Abstract

ABSTRACT We investigate the importance of bid‐ask spread‐induced biases on event date returns as exemplified by seasoned equity offerings by NYSE listed firms. We document significant negative return biases on the offering day which explain a large portion of the negative event date return documented in the literature. Buy‐sell order flow imbalance is prominent around the offering and induces a relatively large spread bias. If order imbalances are suspected, the researcher can use returns calculated from the midpoint of the closing bid and ask quotes instead of returns calculated from closing transaction prices to avoid this return bias.

Journal

The Journal of FinanceWiley

Published: Sep 1, 1991

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