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How Important Is the Financial Media in Global Markets?

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  • John M. Griffin
  • Nicholas H. Hirschey
  • Patrick J. Kelly

Abstract

This article studies differences in the information content of 870,000 news announcements in 56 markets around the world. In most developed markets, a firm's stock price moves much more on days with public news about the firm. In contrast, in many emerging markets volatility is similar on news and non-news days. We examine several hypotheses for our findings. Cross-country differences in stock price reactions are best explained by insider trading, followed by differences in the quality of the news dissemination mechanism. Our findings are useful for quantifying the extent of insider trading and how the financial media affects international markets. The Author 2011. Published by Oxford University Press on behalf of The Society for Financial Studies. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com., Oxford University Press.

Suggested Citation

  • John M. Griffin & Nicholas H. Hirschey & Patrick J. Kelly, 2011. "How Important Is the Financial Media in Global Markets?," The Review of Financial Studies, Society for Financial Studies, vol. 24(12), pages 3941-3992.
    • Handle: RePEc:oup:rfinst:v:24:y::i:12:p:3941-3992
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    File URL: http://hdl.handle.net/10.1093/rfs/hhr099
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