Discover how to calculate covariance to assess stock relationships and optimize your portfolio, balancing risk and potential ...

Data can be overwhelming, but Excel’s CORREL function helps you cut through the noise. Calculating the correlation coefficient is your secret weapon for finding hidden trends and making smarter ...

Correlation coefficients are indicators of the strength of the linear relationship between two different variables, x and y. A linear correlation coefficient that is greater than zero indicates a ...

In the first case, there is a strong upward-sloping relationship between X and Y; in the second case, no apparent relationship; in the third case, a strong downward-sloping relationship. Note the ...

Years ago, our firm employed a junior investment analyst who left us for supposedly greener pastures. In his exit interview, he told me he was leaving in part because he was great at picking ...

John Hood explores how misinterpreting data can lead to flawed conclusions about government policies and their effectiveness.

In the first case, there is a strong upward-sloping relationship between X and Y; in the second case, no apparent relationship; in the third case, a strong downward-sloping relationship. Note the ...