Jin, Livnat, and Zhang (JLZ) examine the predictive ability of two option characteristics – volatility skew and volatility spread – around significant information events such as earnings announcements and unscheduled corporate announcements. They conclude that option traders have an...

We study the effect of disclosure on uncertainty by examining how management earnings forecasts affect stock market volatility. Using implied volatilities from exchange-traded options prices, we find that management earnings forecasts increase short-term volatility. This effect is attributable...

We examine changes in the disclosure behavior of firms involved in 827 disclosure-related class-action securities litigation cases filed between 1996 and 2005. We find no evidence that the firms in our sample respond to the litigation event by increasing or improving their disclosures to...

This paper examines “bundled” forecasts, or management earnings forecasts issued concurrently with earnings announcements, which have evolved to become the most common type of management forecast. We describe the econometric problems associated with measuring bundled forecast news and, in...