The Correlation Coefficient is a measure of the relationship between two securities in terms of how correlated their movements are. This is useful in understanding how any variations of stocks, sectors or markets move in relation to each other.
By default, the calculation is made using closing price from the previous 14 days. Correlation Coefficients range from -1.0 to +1.0. At -1.0, the two securities are completely uncorrelated, whereas at +1.0 they are perfectly correlated.