SELF vs SPY: Correlation
Global Self Storage, Inc. (SELF) and SPDR S&P 500 ETF Trust (SPY) show a weak relationship: their 3-year correlation of weekly returns is 0.11.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SELF and SPY?
On 3 years of weekly data the SELF/SPY correlation comes out at 0.11, weak. The relationship has been stable: the 1-year correlation (0.10) sits close to the 3-year figure. The 5-year figure is 0.15, and annualized covariance runs at 31.8 %².
By 3-year correlation, SPY places #9 of the 14 assets tracked against SELF. The trailing year gives SPY the advantage: +10.0% versus +20.6%, a 10.6-point spread.
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.
SELF vs SPY: side by side
| SELF (Global Self Storage, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +10.0% | +20.6% |
| 5-year return | +36.6% | +82.4% |
| Volatility (ann.) | 20.6% | 14.5% |
| Beta vs S&P 500 | 0.15 | 1.00 |
| Max drawdown (3Y) | -15.9% | -18.8% |
| Market cap | $0.1B | – |
| P/E (trailing) | 31.1 | – |
| Dividend yield | 5.14% | 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 | SELF | SPY |
|---|---|---|
| 2022 | -10.0% | -18.2% |
| 2023 | +0.8% | +26.2% |
| 2024 | +22.0% | +24.9% |
| 2025 | +1.2% | +17.7% |
| 2026 | +13.0% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SELF and SPY good diversifiers for each other?
Yes: at 0.11, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between SELF and SPY?
As of 2026-08-27, the correlation of weekly returns between SELF and SPY is 0.11 over 3 years, 0.10 over 1 year and 0.15 over 5 years.
Is SPY a good diversifier for SELF?
Yes: at 0.11, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of 0.11 mean?
A reading of 0.11 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: SELF correlations · SPY correlations
