In building a portfolio of various assets, investors should avoid those that are perfectly correlated, he said.

Among other evidence for this view, some studies have found factors representing g and working memory to be perfectly correlated.

A wave containing only a single frequency (monochromatic) is perfectly correlated at all times according to the above relation.

Perhaps we need a wider acceptance in society as a whole that happiness isn't perfectly correlated with money?

The reason is that these three attributes always co-occur and in this case are perfectly correlated .

Perfectly correlated among themselves, these measurements allow us to propose a simple and non-nvasive model for use in clinical pharmacology.

This is contrary to economic theory which predicts that with full risk sharing, relative consumption should be perfectly correlated with the real exchange rate.

The returns from different assets are highly unlikely to be perfectly correlated and the correlation may sometimes be negative.

An investor can reduce portfolio risk simply by holding combinations of instruments that are not perfectly positively correlated (correlation coefficient ).