Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Robert Kelly is managing director of XTS Energy LLC ...

Each month, I provide an update to my four dividend growth model portfolios that includes portfolio beta and other volatility-adjusted metrics, such as the Sharpe Ratio. Recently, I was asked by a few ...

For comparison of proportions, there are three commonly used measurements: the difference, the relative risk, and the odds ratio. Significant effort has been spent on exact confidence intervals for ...

Gart (1962) presented consistent and efficient estimators of the common relative risk for several 2 × 2 tables, together with their associated confidence intervals. A theorem on the asymptotic ...