Fluctuating Confidence in Stock Markets: Implications for Returns and Volatility

Alexander David

Journal of Financial and Quantitative Analysis, 1997, vol. 32, issue 4, 427-462

Abstract: The average relative profitability of different firms in the economy jumps erratically. Although investors are unable to observe these productivity switches, they continuously update their beliefs regarding high and low productivity firms by observing the total return on each firm, which consists of the average productivity plus noise. The portfolio choices, interest rate, and stock return processes are derived in a Cox-Ingersoll-Ross (1985a) style general equilibrium model. Three stylized facts of stock market returns are addressed: negative skewness, excess kurtosis, and predictive asymmetry (excess returns and future changes in volatility are negatively correlated). To measure the last stylized fact, an EGARCH model is fitted to sample paths simulated from the model. Parameter values that permit faster learning fit the three facts better.

Date: 1997
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