Research

Forecasting Crashes: Trading Volume, Past Returns and Conditional Skewness in Stock Prices
Journal of Financial Economics, 2001

This paper is an investigation into the determinants of asymmetries in stock returns. Associate Professor Joseph Chen and co-authors Harrison G. Hong from Princeton and Jeremy C. Stein from Harvard develop a series of cross-sectional regression specifications which attempt to forecast skewness in the daily returns of individual stocks.

Negative skewness is most pronounced in stocks that have experienced: 1) an increase in trading volume relative to trend over the prior six months; and 2) positive returns over the prior thirty-six months. The first finding is consistent with the model of Hong and Stein (1999), which predicts that negative asymmetries are more likely to occur when there are large differences of opinion among investors. The latter finding fits with a number of theories, most notably Blanchard and Watson’s (1982) rendition of stock-price bubbles.

Analogous results also obtain when we attempt to forecast the skewness of the aggregate stock market, though our statistical power in this case is limited.

This paper won Chen and his co-authors 2nd Place in the 2001 Journal of Financial Economics Fama-DFA Prize for Best Paper in Capital Markets and Asset Pricing.

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