During financial crises, financial market regulators often restrict short-selling to support prices and curb volatility. However, evidence suggests that short-selling bans during the turmoil in financial markets in 2007--2009 failed to achieve regulators' goals. We analyze a model of costly...

We analyze a rational expectations equilibrium model to explore the implications of information networks for the financial market. When information is exogenous, social communication improves market efficiency. However, social communication crowds out information production due to traders'...

Using a novel dataset containing investors' access of company filings through the SEC's EDGAR system, we show that the abnormal number of IPs searching for firms' financial statements strongly predicts future stock returns and firm fundamentals. Consistent with theories of costly information...

We study how stock price informativeness changes with the presence of highfrequency trading (HFT). Our estimate is based on the staggered start of HFT participation in a panel of international exchanges. With HFT presence market prices are a less reliable predictor of future cash ows and...

We study how the informativeness of stock prices changes with the presence of high-frequency trading (HFT). Our estimate is based on the staggered start of HFT participation in a panel of international exchanges. With HFT presence, market prices are a less reliable predictor of future cash flows...