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

Correlation is a statistical measurement of the variation between two variables. It’s based on variance and standard deviation and it can be a critical tool in analyzing the risk of an investment.

The formula for Pearson’s correlation coefficient, r, relates to how closely a line of best fit, or how well a linear regression, predicts the relationship between the two variables. It is presented ...

Both Spearman’s rank and Pearson’s correlation tests share the purpose of assessing the strength and direction (negative or positive) of an association between two variables. For both correlation ...

And the correlation coefficient between the monthly rate of change for US stocks and oil (since 1973—as far back as I can get good monthly data for oil) is: -0.003.

Correlation coefficient measures the strength and direction of a linear relationship between two variables. It ranges from -1 to 1, where 1 indicates a perfect positive relationship and -1 ...