This study examines the information content of Standard & Poor's common stock ranking changes. Since prior studies find Standard & Poor's common stock rankings provide investors with a measure of risk, a ranking change may signify a change in risk. Common stock ranking changes made by Standard &...

This paper examines stock price reactions to changes in Standard & Poor's common stock rankings. Using internal memoranda obtained directly from Standard & Poor's, an event study methodology, and a sample of 191 upgrades and 582 downgrades, we find that the majority of stock price reactions...

This study examines the information content of Standard & Poor's common stock ranking changes. Since prior studies find Standard & Poor's common stock rankings provide investors with a measure of risk, a ranking change may signify a change in risk. Common stock ranking changes made by Standard &...

Accurately calculated historical returns are critical inputs for investment decisions. We document that data vendors' adjustments to historical prices for dividends and stock splits result in inaccurate estimations of historical returns. We demonstrate several techniques that can be used to...