Review of Studies on the Relationship between Trading Volume and Stock Returns -- Data and Methodology -- Results: Trading Volume and the Cross-Sectional Variation of Stock Returns -- Results: Time-Stability of Portfolio Returns -- Results: Economic Significance of Volume-Return Relations -- Summary and Conclusions.

Alexander Brändle investigates the relationship between different measures of trading volume and returns in the Swiss stock market. He discovers that stocks with unusual trading volume in a given month experience systematically higher subsequent returns. This abnormal volume effect is particularly strong in uncertain market situations including the 2008 downturn.