Correlation coefficients can mean a positive, negative, or no relationship between two variables. Use correlation coefficients to help pick securities for your portfolio.

The volatility of a pair is measured by calculating the standard deviation of its returns. The standard deviation is a measure of how widely values are dispersed from the average value (the mean).

How would your retirement plans change if you knew you would live to 100? While no one has a crystal ball to see the future, there are tools available to help you make an educated guess about ...