Asymmetric volatility in equity markets has been widely documented in finance, where two competing explanations, as considered in Bekaert and Wu (2000), are the financial leverage and the volatility feedback hypothesis. We explicitly test for the role of both hypotheses in explaining extreme...

The purpose of this paper is to examine additions and deletions of the S&P500. Competing event studies will be performed to analyze the announcement effect with different benchmarks. The main components of the paper are a Market Model based event study and a GARCH(1,1)-M Model study. The GARCH-M...

Heterosedasticity in returns may be explainable by trading volume. We use different volume variables, including surprise volume - i.e. unexpected above-avergae trading activity - which is derived from uncorrelated volume innovations. Assuming eakly exogenous volume, we extend the Lamoureux and...