This article develops a strategic trading model in which the outsider is overconfident on the shared information. Our result shows that a more confident outsider underreacts to his information in the sense that he trades less aggressively on his information, leading to a less profit in the...

We study the impact of public information and shared information on traders' trading behavior in the context of Kyle's (1985) speculative market. We suppose that there are four types of traders in our model: one insider, M outsiders, liquidity traders, and market makers. We explicitly describe...