Margin Trading, Overpricing, and Synchronization Risk
54 Pages Posted: 24 Aug 2005
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Margin Trading, Overpricing, and Synchronization Risk
Margin Trading, Overpricing, and Synchronization Risk
Abstract
We provide experimental evidence that relaxing margin restrictions to allow more short-selling can exacerbate overpricing, even though it reduces equilibrium price levels. This is because smart-money traders initially profit more by front-running optimistic investor sentiment than by disciplining prices. When short-selling is not possible, competitive pressures among arbitrageurs rapidly drive them to the equilibrium. However, the risk of margin calls slows the convergence process, because arbitrageurs who sell short too early face substantial losses if they are unable to synchronize their trades with other arbitrageurs (as in Abreu and Brunnermeier 2002; 2003).
Keywords: Market Efficiency, Limits to Arbitrage, Bubbles, Experimental Economics
JEL Classification: A10, C90, C72, G10, M40, G30, G14, C92
Suggested Citation: Suggested Citation
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