**What is it?**

A grid that shows how strong a relationship is between multiple data sets.

**Who is interested?**

Anyone looking to measure the strength of the relationship between two variables.

**What does it tell me?**

The matrix tells you how well two indexes move together on a scale of -1 to 1. The closer the value is to -1 or 1 the tighter the correlation or relationship between the two variables.

A value of 1 indicates a perfect correlation between two variables. I.e. as one value moves up so does the other.

A value of -1 means the two values are perfectly divergent. I.e. as one value moves down the other moves up.

A value of 0 indicates no relationship is present.