Trading Volume and Information Revelation in Stock Market

Matti Suominen

Journal of Financial and Quantitative Analysis, 2001, vol. 36, issue 4, 545-565

Abstract: I consider a market microstructure model in which the rates of public and private information arrival are probabilistic. The latter depends on the availability of private information that is stochastically changing over time. In equilibrium, traders estimate the availability of private information using past priods' trading volume and use this information to adjust their strategies. The time-series properties include contemporaneous correlation between price variability and volume and autocorrelation in price variability (similar to GARCH). The model explains why trading volume contains useful information for predicting volatility and provides predictions on the limit and market order placement strategies of traders.

Date: 2001
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