Correlation Coefficient
The correlation coefficient is a statistical metric, ranging from negative one to positive one, that quantifies the strength and direction of the relationship between two variables. A value of one indicates a perfect positive correlation, while negative one indicates a perfect inverse relationship.
In finance, this coefficient is used to construct diversified portfolios, as assets with low or negative correlations tend to offset each other's volatility. Crypto traders use this to determine if adding a specific asset will truly reduce their overall risk or if they are simply increasing their exposure to the same market drivers.
Because correlations are dynamic, they must be recalculated frequently to account for changing market regimes. It is the mathematical foundation for modern portfolio theory applied to digital assets.