Return, Trading Volume, and Market Depth in Currency Futures Markets

We use a class of stochastic volatility models with multiple latent factors to investigate the joint dynamics of return, trading volume, and open interest (a proxy for market depth) in currency futures markets. In accordance with theory, the empirical evidence indicates that there is more than one latent factor affecting these three variables. However, the evidence is ambivalent on the choice between two- and three-latent-factor models. These three variables also display different patterns of information spillovers across currency futures.