Overlapping area represents the amount of risk that can be diversified away by holding Sprint Corp. and UTStarcom Holdings Corp in the same portfolio assuming nothing else is changed. The correlation between historical prices or returns on UTStarcom Holdings Corp and Sprint is a relative statistical measure of the degree to which these equity instruments tend to move together. The correlation coefficient measures the extent to which returns on Sprint Corporation are associated (or correlated) with UTStarcom Holdings. Values of the correlation coefficient range from -1 to +1, where. The correlation of zero (0) is possible when the price movement of UTStarcom Holdings Corp has no effect on the direction of Sprint i.e. Sprint and UTStarcom Holdings go up and down completely randomly.