What is Cross-Asset Correlation?
How much different instruments move together — the highest-leverage non-directional signal in the dashboard.
Definition
Cross-asset correlation (ρ) is the rolling Pearson correlation of returns between two instruments over a defined window (typically 60 trading days). Range: -1 (perfectly inverse) to +1 (perfectly aligned). Correlation regimes shift: in PEACE many pair correlations sit between -0.3 and +0.3; in WAR/CRISIS they collapse to ±0.7+ (single-narrative dominance).
Why it matters for trading
- Diversification is a function of correlation, not asset class. Holding 10 long-equity positions when SPX correlation across them is +0.9 = effectively one position with leverage. Correlation tells you the truth.
- Correlation *change* is more actionable than correlation level. A pair drifting from 0.2 to 0.7 over 2 weeks signals regime convergence — every signal in either name now leverages the same factor.
- Cross-asset confirmation: a long crude signal that has gold moving with it (+ρ) is higher-quality than the same signal with gold uncorrelated (ρ ~0). The correlation is the macro-narrative consistency check.