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Idiosyncratic return variation: Firm-specific information or noise?

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  • Shu, Yaruo
  • Sohn, Sungbin

Abstract

There has been a long debate on the interpretation of idiosyncratic return variation. We inform this debate by examining the extent to which stock return synchronicity is associated with post-earnings announcement drift (PEAD) in China. We find that firms with higher synchronicity exhibit less pronounced PEAD and that this negative association weakens for firms with high institutional ownership. The findings suggest that in the Chinese stock markets, where retail investors are in the majority, idiosyncratic returns reflect noise rather than firm-specific information on average, and institutional investors play a role in reducing noise in idiosyncratic returns.

Suggested Citation

  • Shu, Yaruo & Sohn, Sungbin, 2022. "Idiosyncratic return variation: Firm-specific information or noise?," Finance Research Letters, Elsevier, vol. 47(PA).
    • Handle: RePEc:eee:finlet:v:47:y:2022:i:pa:s1544612322001015
    DOI: 10.1016/j.frl.2022.102789
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    References listed on IDEAS

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    More about this item

    Keywords

    Stock return synchronicity; Price informativeness; Post-earnings announcement drift; Institutional ownership;
    All these keywords.

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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