Want to learn something about correlation, also known as correlation coefficient? Conceptually, correlation appears simple and recognizable. When two asset classes trade simultaneously in the same direction, they are in positive correlation. When two asset classes trade simultaneously in opposite directions, they are in negative correlation.

Correlations between asset classes differ constantly. Somewhat like a marriage. You go to bed, and synchronicity is positive (what I’ll call positive correlation). In the morning you wake up asking what happened! You both simultaneously disagree on everything (What I’ll call negative correlation.)

During 2007 and 2008, the U.S. $ suffers burdens against nearly every currency. At the same time, oil costs per barrel increase (Important to point out that the cost-per-barrel is dollar denominated.). When looking at a chart, you will notice that when oil goes up the dollar goes down. When the dollar goes up, the price-per-barrel goes down. We call this negative correlation; in fact, just about perfect negative correlation and this explains the trades back and forth between the dollar and oil.

Your asset allocation model wants as many cross correlated asset classes as possible. When one is up, the other is down.

This entry was posted on Wednesday, June 25th, 2008 at 12:58 pm and is filed under Correlation, Dollar, Investing, Oil, asset allocation. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.