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Title: Costly Interpretation of Asset Prices

Author(s): Jordi Mondria, Xavier Vives and Liyan Yang

Publication Date: October 2017

Keyword(s): asset prices, Complementarity, Investor sophistication and price momentum

Programme Area(s): Financial Economics

Abstract: We propose a model in which investors cannot costlessly process information from asset prices. At the trading stage, investors are boundedly rational and their interpretation of prices injects noise into the price, generating a source of endogenous noise trading. Our setup predicts price momentum and yields excessive return volatility and excessive trading volume. In an overall equilibrium, investors optimally choose sophistication levels by balancing the benefit of beating the market against the cost of acquiring sophistication. There can exist strategic complementarity in sophistication acquisition, leading to multiple equilibria.

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Bibliographic Reference

Mondria, J, Vives, X and Yang, L. 2017. 'Costly Interpretation of Asset Prices '. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=12360