FUSB vs SPY: Correlation
Measured on weekly returns over the past three years, First US Bancshares, Inc. (FUSB) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.12, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FUSB and SPY?
Across a 3-year window, the weekly returns of FUSB and SPY correlate at 0.12, weak. The link has loosened recently: the 1-year correlation (-0.01) runs below the 3-year figure (0.12). Stretching to 5 years gives 0.06, with an annualized covariance of 44.0 %².
Among the 16 assets we track against FUSB, SPY ranks #6 by 3-year correlation. The last year tells two different stories: FUSB led by 33.7 percentage points, +54.3% for FUSB against +20.6% for SPY. Note the risk asymmetry: FUSB runs 1.8 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
FUSB vs SPY: side by side
| FUSB (First US Bancshares, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +54.3% | +20.6% |
| 5-year return | +66.8% | +82.4% |
| Volatility (ann.) | 26.1% | 14.5% |
| Beta vs S&P 500 | 0.21 | 1.00 |
| Max drawdown (3Y) | -23.2% | -18.8% |
| Market cap | $0.1B | – |
| P/E (trailing) | 12.4 | – |
| Dividend yield | 1.70% | 1.01% |
| Expense ratio | – | 0.09% |
| Assets under management | – | $795.3B |
| Sector / category | US Listed | ETF · US Large Cap |
SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | FUSB | SPY |
|---|---|---|
| 2022 | -16.7% | -18.2% |
| 2023 | +21.6% | +26.2% |
| 2024 | +24.5% | +24.9% |
| 2025 | +13.4% | +17.7% |
| 2026 | +18.1% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FUSB and SPY good diversifiers for each other?
By historical standards, yes. A correlation of 0.12 means the two rarely move for the same reasons.
FAQ
What is the correlation between FUSB and SPY?
Using weekly returns as of 2026-08-27: 0.12 over 3 years, with -0.01 over the last year and 0.06 over 5 years.
Is SPY a good diversifier for FUSB?
By historical standards, yes. A correlation of 0.12 means the two rarely move for the same reasons.
What does a correlation of 0.12 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
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Related comparisons
Hubs: FUSB correlations · SPY correlations
