Using a comprehensive sample of trades by Schedule 13D filers, who possess valuable private information when they accumulate stocks of targeted companies, this paper studies whether several liquidity measures reveal the presence of informed trading. The evidence suggests that when Schedule 13D...

We extend Kyle's (1985) model of insider trading to the case where noise trading volatility follows a general stochastic process. In equilibrium, price impact and price volatility are stochastic, even though the fundamental value is constant. `Excess stochastic volatility' may arise because...