Understanding Correlation Strength
The correlation between CAD and commodities isn’t a fixed number. It shifts depending on what’s happening in the global economy. During periods of strong global growth, the correlation strengthens — commodity demand rises, and CAD rises with it. But when markets get nervous about recession, investors flee to safety (US dollars and Treasury bonds), and the CAD-commodity link weakens.
Historically, the correlation coefficient between CAD and the S&P GSCI commodity index sits around 0.65 to 0.75 over medium-term periods. That’s strong, but not perfect. Some days they move opposite directions. Why? Because other factors matter too — US interest rates, Canadian interest rates, risk appetite, and political events can temporarily override commodity signals.
The relationship also changes seasonally. Summer months see stronger commodity-CAD correlation because agricultural markets heat up and construction demand peaks. Winter months are weaker, especially if Northern Hemisphere economies slow.