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No 758:
Risk aversion and herd behavior in financial markets

Stefano LOVO and Jean-Paul DECAMPS

Abstract: We show that differences in investors risk aversion can generate herd behavior in stock markets where assets are traded sequentially. This in turn prevents markets from being efficient in the sense that financial market prices do not converge to the asset's fundamental value. The informational efficiency of the market depends on the distribution of the risky asset across risk averse agents. These results are obtained without introducing multidimensional uncertainty.

Keywords: herd behavior; stock markets; efficiency; (follow links to similar papers)

JEL-Codes: G14; (follow links to similar papers)

36 pages, May 14, 2002

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