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Rev Fin 2003; 16:487-525
© 2003 the Society for Financial Studies
Differences of Opinion, Short-Sales Constraints, and Market Crashes
Princeton University
Harvard University and NBER
Address correspondence to: Harrison Hong, Department of Economics, Princeton University, Princeton, NJ 08544, or e-mail: hhong{at}princeton.edu.
Abstract
We develop a theory of market crashes based on differences of opinion among investors. Because of short-sales constraints, bearish investors do not initially participate in the market and their information is not revealed in prices. However, if other previously bullish investors bail out of the market, the originally bearish group may become the marginal "support buyers," and more will be learned about their signals. Thus accumulated hidden information comes out during market declines. The model explains a variety of stylized facts about crashes and also makes a distinctive new predictionthat returns will be more negatively skewed conditional on high trading volume.
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