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Price changes around hedge fund trades: disentangling trading and disclosure effects

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  • Ettore Croci
  • Giovanni Petrella

Abstract

Previous studies find positive stock market reactions around announcements that hedge funds own large equity stakes in companies and use this evidence to support the hypothesis that hedge fund activism creates value. A concurrent explanation is that the price reaction reflects, at least in part, the market impact associated with hedge fund trades. We exploit the blockholder’s legal filing requirements with the Italian regulatory authority (CONSOB) to separately examine trading and disclosure effects associated with hedge fund trades. Trading effects are related to hedge funds’ buying activity on the market, whereas disclosure effects are related to the possibility that the market anticipates future activism and reacts to the announcement of hedge funds’ ownership. The trading effect is significantly larger than the disclosure effect. This result implies that the price impact associated with hedge fund purchases explains a large portion of the price reaction attributed exclusively to hedge fund activism in previous studies. We also find that trading by hedge funds produces a permanent change in the stock price, which occurs in equal part both prior to and concurrent to the trading activity. The execution strategy used by hedge funds to accumulate their position (on exchange or downstairs trading vs. block trading or upstairs) affects both the size and the temporal distribution of the trading effect. Copyright Springer Science+Business Media New York 2015

Suggested Citation

  • Ettore Croci & Giovanni Petrella, 2015. "Price changes around hedge fund trades: disentangling trading and disclosure effects," Journal of Management & Governance, Springer;Accademia Italiana di Economia Aziendale (AIDEA), vol. 19(1), pages 25-46, February.
    • Handle: RePEc:kap:jmgtgv:v:19:y:2015:i:1:p:25-46
    DOI: 10.1007/s10997-013-9267-4
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    References listed on IDEAS

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