Stock Market Volatility and Learning

Klaus Adam (), Albert Marcet and Juan Pablo Nicolini ()

No 6518, CEPR Discussion Papers from C.E.P.R. Discussion Papers

Abstract: Introducing bounded rationality into a standard consumption based asset pricing model with a representative agent and time separable preferences strongly improves empirical performance. Learning causes momentum and mean reversion of returns and thereby excess volatility, persistence of price-dividend ratios, long-horizon return predictability and a risk premium, as in the habit model of Campbell and Cochrane (1999), but for lower risk aversion. This is obtained, even though we restrict consideration to learning schemes that imply only small deviations from full rationality. The findings are robust to the particular learning rule used and the value chosen for the single free parameter introduced by learning, provided agents forecast future stock prices using past information on prices.

Keywords: asset pricing puzzles; consumption-based asset pricing; learning (search for similar items in EconPapers)
JEL-codes: D84 G12 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-bec and nep-upt
Date: 2007-10
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Working Paper: Stock Market Volatility and Learning (2008)
Working Paper: Stock market volatility and learning (2008)
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