46 Pages Posted: 18 Feb 2009
Date Written: February 2009
Theoretical asset pricing models routinely assume that investors have heterogeneous information. We provide direct evidence of the importance of information asymmetry for asset prices and investor demands using plausibly exogenous variation in the supply of information caused by the closure or restructuring of brokerage firms' research operations. Consistent with predictions derived from a Grossman and Stiglitz-type model, share prices and uninformed investors' demands fall as information asymmetry increases. Cross-sectional tests support the comparative statics. Prices and uninformed demand experience larger declines, the more investors are uninformed, the larger and more variable is turnover, the more uncertain is the asset's payoff, and the noisier is the better-informed investors' signal. We show that prices fall because expected returns become more sensitive to a liquidity-risk factor. Our results imply that information asymmetry has a substantial effect on asset prices and that a primary channel linking asymmetry to prices is liquidity.
Keywords: analyst coverage, Asymmetric-information asset pricing, liquidity
JEL Classification: G12, G14, G17, G24
Suggested Citation: Suggested Citation
Kelly, Bryan T. and Ljungqvist, Alexander, Testing Asymmetric-Information Asset Pricing Models (February 2009). CEPR Discussion Paper No. DP7180. Available at SSRN: https://ssrn.com/abstract=1345707
By Yakov Amihud
By Yakov Amihud
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