Yes, very true! Correlations (positive) diminish in rising markets, as does volatility, and declining markets these things tend to pick up.Correlation is not static. Generally the less volatility, the more uncorrelated choices you have.
It;s why you now see, as is typical for a bull market, sector selection and individual stock selection becomes important. It;s why things like real estate has selective markets, etc.
But when something like 07, 08 comes along......everything goes.
