Business Intelligence

Investor Expectations, Business Conditions, And The Pricing Of Beta-instability Risk

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Executive Summary

This paper examines the pricing implications of time-variation in assets' market betas over the business cycle in a conditional CAPM framework. The authors use a half century of real GDP growth expectations from economists' surveys to determine forecasted economic states. This approach largely avoids the confounding effects of econometric forecasting model error. The expectation measure forecasts the market return controlling for existing predictive variables. The loadings on the expectation measure explain a significant fraction of cross-sectional variation in stock returns. A fully tradable, ex ante mimicking portfolio generates positive risk-adjusted returns during good economic times over four decades.

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