Overlapping area represents the amount of risk that can be diversified away by holding U Vend Inc and Otis Gold Corp in the same portfolio assuming nothing else is changed. The correlation between historical prices or returns on Otis Gold Corp and U Vend 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 U Vend are associated (or correlated) with Otis Gold. Values of the correlation coefficient range from -1 to +1, where. The correlation of zero (0) is possible when the price movement of Otis Gold Corp has no effect on the direction of U Vend i.e. U Vend and Otis Gold go up and down completely randomly.