Correlation is measured through the correlation coefficient, which always returns a value between +1.0 (perfectly positively correlated) and -1.0 (perfectly negatively correlated).

Investopedia / Hugo Lin Assessments of correlation strength based on the correlation coefficient value vary by application. In physics and chemistry, a correlation coefficient should be lower than ...

Step 2: Calculate the 90-day correlation of Apple and S&P 500 by using the shorthand command in the spreadsheet. It won't matter whether Apple is the first or second array, just as long as the ...