The Dynamic Relation Between Stock Returns, Trading Volume, and Volatility


  • Mr. Rui gratefully acknowledges the financial support from the Hong Kong Polytechnic University (Account No. G-YC26).

  • The authors thank an anonymous referee for helpful comments.

* Corresponding author: Department of Accountancy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China; Phone: (852) 27667062; Fax: (852) 23309845; Email:


We examine the dynamic relation between returns, volume, and volatility of stock indexes. The data come from nine national markets and cover the period from 1973 to 2000. The results show a positive correlation between trading volume and the absolute value of the stock price change. Granger causality tests demonstrate that for some countries, returns cause volume and volume causes returns. Our results indicate that trading volume contributes some information to the returns process. The results also show persistence in volatility even after we incorporate contemporaneous and lagged volume effects. The results are robust across the nine national markets.