We use the 2007 acquisition of Dow Jones & Co. by News Corporation to study whether the perception of a news source's political affiliation affects its credibility and financial market impact. Following 2007, the price of Republican- (Democrat-) aligned stocks becomes less sensitive to positive...

Positive return correlation signals slowly-diffusing information. Short sell-constrained institutions are mainly informed in their buy trades. Building on these facts, we identify informed investors ex ante by focusing on mutual funds. We propose a measure of the dynamic excess autocorrelation...

We study how the presence of short sellers affects the incentives of the insiders to trade on negative information. We show it induces insiders to sell more (shares from their existing stakes) and trade faster to preempt the potential competition from short sellers. An experiment and...

We study the degree of information substitutability in the financial market. Exploiting the cross-sectional and time-series variations of the pandemic-triggered lockdowns that have hampered people's physical interactions hence the ability to collect, process, and transmit soft information, we...

We investigate whether providers of news analytics affect the stock market. We exploit a unique identification strategy based on revisions between different product releases of a major provider of news analytics. We document a causal effect of news analytics on the market, irrespective of the...

This paper is an empirical investigation of how the uncertainty induced by investors' learning about the fundamentals affects stock prices. We identify two components of induced uncertainty: learning and dispersion of beliefs. We characterize these in terms of their relationship to uncertainty...

We address the issue of how heterogeneity of trade among investors affects stock returns. We develop a model of the dispersion of opinion among investors that has implications for asset pricing. We test the relationship between dispersion of investor opinion and stock returns using a two-year...

We study how dealers behave when there exist parallel markets for the same asset that are characterized by very different degrees of transparency. We show that the optimal trading strategy, depending on the features of the less transparent market, may involve price manipulation. Informed dealers...

We address the issue of how the heterogeneity of trade among investors affects stock returns. We model and test the relationship between dispersion of opinion, heterogeneity of trade and stock returns. The empirical investigation makes use of a two-year panel of more than 91 thousand individual...