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