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The Information Content of Abnormal Trading Volume

Emanuele Bajo ()

Journal of Business Finance & Accounting, 2010, vol. 37, issue 7‐8, 950-978

Abstract: Abstract: This paper investigates the way in which abnormal trading volume reveals new information to market participants. It is generally thought that trading volume is an efficient proxy for information flow and enhances the information set of investors. However, no research has related the presence of abnormal trading volume to firm characteristics, such as ownership and governance structure, which also have a theoretical link to information quality. I find strong excess returns around extreme trading levels, which are only moderately attributable to information disclosure. Moreover, these returns are not caused by liquidity fluctuations since prices do not reverse over the following period. In contrast, there is evidence of price momentum, suggesting that traders can implement successful portfolio strategies based on observation of current volumes.

Date: 2010
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https://doi.org/10.1111/j.1468-5957.2010.02197.x

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Journal of Business Finance & Accounting is currently edited by P. F. Pope, A. W. Stark and M. Walker

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