We develop a framework to investigate time-varying informed and uninformed trading activities and the relationship between them. Informed traders may match the level of the uninformed arrival rate with certain probability so as to make better use of the camouflage provided by the uninformed...

Building upon the seminal work of Easley, Kiefer, O'Hara and Paperman (1996), we develop a framework to investigate the relationship between the behavior of uninformed investors and the time-varying informed trading activities. We allow the arrival rates for uninformed traders to follow a Markov...