CONVEX
Correlation Deep Dive

VIX vs Fed Balance Sheet: Correlation Analysis

Pearson correlation of daily returns for VIX Index and Fed Balance Sheet. Rolling windows, yearly breakdown, regression beta, and divergence analysis. Data window spans to (258 aligned observations).

30-Day
-0.052
Essentially uncorrelated
90-Day
+0.010
Essentially uncorrelated
1-Year
+0.086
Essentially uncorrelated
5-Year
+0.076
Essentially uncorrelated

What the Number Means

With a correlation of 0.01, VIX Index and Fed Balance Sheet are essentially uncorrelated at daily frequency. Either the relationship operates at a different time horizon or the shared driver has been dominated by idiosyncratic noise during the observation window.

Recent vs Long-Run Behavior

Last 90 Days
+0.010
5-Year Baseline
+0.076

Recent correlation tracks the long-run relationship closely. No meaningful divergence. The historical pattern between VIX Index and Fed Balance Sheet is intact and should continue to serve as a reasonable baseline for positioning.

Statistical Details (1-Year Window)

Pearson Correlation (r)+0.086
R-Squared (r²)0.007
Beta (VIX Index vs Fed Balance Sheet)3.459
Daily Volatility σ(VIX Index)16.41%
Daily Volatility σ(Fed Balance Sheet)0.41%
Observations252

Correlation measures directional co-movement; R² quantifies the fraction of variance explained by the linear relationship. Beta is the slope coefficient from regressing VIX Index returns on Fed Balance Sheet returns. A beta above 1 means the first asset amplifies moves of the second.

Year-by-Year Correlation

YearCorrelationStrengthObservations
2026-0.024Essentially uncorrelated17
2025+0.074Essentially uncorrelated52
2024-0.039Essentially uncorrelated51
2023+0.280Weak positive52
2022+0.204Weak positive52
2021-0.023Essentially uncorrelated34

Year-by-year correlation reveals how the relationship has held up across different macro regimes. Sharp year-over-year swings in correlation often mark the transition between stress and calm periods.

Rolling 90-Day Extremes

Most Correlated Period
+0.268
ending 2023-09-13
Most Decoupled Period
-0.188
ending 2024-12-04

Extremes in rolling 90-day correlation often coincide with regime changes, forced deleveraging, or the arrival of a dominant new macro theme that overwhelms normal relationships.

Methodology

Correlations are computed on daily log-adjacent returns for VIX Index and Fed Balance Sheet, aligned on shared trading dates. We use the Pearson product-moment coefficient, which measures the linear relationship between two return series.

Windows are the most recent N observations for 30D, 90D, and 1Y (252 trading days); the 5Y figure uses all aligned data up to 1,260 observations. Beta is the OLS slope from regressing the first series on the second. Data updates daily with a 24-hour revalidation cadence.

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Get daily macro analysis on shifting correlations, regime transitions, and cross-asset signals.

Correlation is not causation and backward-looking statistics can fail when regimes shift. Positions sized on historical correlation assumptions should be stress-tested against scenarios where the relationship breaks. For informational purposes only.