A Theory of Asset Pricing Based on Heterogeneous Information
We propose a theory of asset prices that emphasizes heterogeneous information as the main element determining prices of different securities. Our main analytical innovation is in formulating a model of noisy information aggregation through asset prices, which is parsimonious and tractable, yet flexible in the specification of cash flow risks. We show that the noisy aggregation of heterogeneous investor beliefs drives a systematic wedge between the impact of fundamentals on an asset price, and the corresponding impact on cash flow expectations. The key intuition behind the wedge is that the identity of the marginal trader has to shift for different realization of the underlying shocks to satisfy the market-clearing condition. This identity shift amplifies the impact of price on the marginal trader's expectations. We derive tight characterization for both the conditional and the unconditional expected wedges. Our first main theorem shows how the sign of the expected wedge (that is, the difference between the expected price and the dividends) depends on the shape of the dividend payoff function and on the degree of informational frictions. Our second main theorem provides conditions under which the variability of prices exceeds the variability for realized dividends. We conclude with two applications of our theory. First, we highlight how heterogeneous information can lead to systematic departures from the Modigliani-Miller theorem. Second, in a dynamic extension of our model we provide conditions under which bubbles arise.
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- Elias Albagli & Christian Hellwig & Aleh Tsyvinski, 2011.
"Information Aggregation, Investment, and Managerial Incentives,"
NBER Working Papers
17330, National Bureau of Economic Research, Inc.
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- Elias Albagli & Christian Hellwig & Aleh Tsyvinski, 2011. "Information Aggregation, Investment, and Managerial Incentives," Cowles Foundation Discussion Papers 1816, Cowles Foundation for Research in Economics, Yale University.
- Albagli, Elias & Hellwig, Christian & Tsyvinski, Aleh, 2011. "Information Aggregation, Investment, and Managerial Incentives," CEPR Discussion Papers 8539, C.E.P.R. Discussion Papers.
- Harrison Hong & David Sraer, 2012.
NBER Working Papers
18547, National Bureau of Economic Research, Inc.
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"Self-Fulfilling Currency Crises: The Role of Interest Rates,"
American Economic Review,
American Economic Association, vol. 96(5), pages 1769-1787, December.
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"Disagreement and the Stock Market,"
2894690, Harvard University Department of Economics.
- Brunnermeier, Markus K., 2001. "Asset Pricing under Asymmetric Information: Bubbles, Crashes, Technical Analysis, and Herding," OUP Catalogue, Oxford University Press, number 9780198296980, March.
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