The competitive market is informationally efficient; people only need to know prices to implement a competitive outcome. However, the standard formulation of competition neglects any underlying market microstructure; prices—which provide all necessary information—are exogenous. This paper...

This paper empirically examines the hypothesis that diffusion of information is not uniform across all industries of a stock market. Large industries or industries where trading volume is substantially high attract attention of a large number of investors who in turn make these industries...

We study the relation between equity market uncertainty and the informational efficiency of U.S. equity prices, proxied by the SPDR S&P 500 Trust ETF. Using the Baker, Bloom, and Davis (2016) equity market uncertainty index, we document a negative relation between market uncertainty and...

The ability of option-based measures to predict future stock returns is not a sufficient condition for the existence of incremental information in options. If options markets are informationally more efficient than the stock market, then option measures may be used to predict future actual stock...