Do stock market correlations matter?
Statisticians use correlations (or cross-correlation) to measure the relationship between asset classes or investments. The general idea is to better understand the similarity or dissimilarity in how investments perform against each other and to build a portfolio of investments that can benefit.
The CBOE S&P 500 Implied Correlation Index (ChicagoOptions:^KCJ) also known as the “ICI”
…