NSTS vs SPY: Correlation
How closely do NSTS Bancorp, Inc. (NSTS) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.01, which is near-zero.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NSTS and SPY?
On 3 years of weekly data the NSTS/SPY correlation comes out at 0.01, near zero, meaning they move largely independently. The link has tightened recently: the 1-year correlation (0.28) runs above the 3-year figure (0.01). The 5-year figure is 0.07, and annualized covariance runs at 1.7 %².
Within NSTS's tracked universe of 15 assets, SPY comes in at #7 by 3-year correlation. Twelve-month performance is nearly a tie, at +17.9% for NSTS and +20.6% for SPY.
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.
NSTS vs SPY: side by side
| NSTS (NSTS Bancorp, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +17.9% | +20.6% |
| 5-year return | +11.4% | +82.4% |
| Volatility (ann.) | 19.0% | 14.5% |
| Beta vs S&P 500 | 0.01 | 1.00 |
| Max drawdown (3Y) | -18.5% | -18.8% |
| Market cap | $0.1B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 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 | NSTS | SPY |
|---|---|---|
| 2022 | – | -18.2% |
| 2023 | -6.1% | +26.2% |
| 2024 | +24.1% | +24.9% |
| 2025 | +9.7% | +17.7% |
| 2026 | +8.3% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NSTS and SPY good diversifiers for each other?
Yes. With a correlation of 0.01, NSTS and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between NSTS and SPY?
As of 2026-08-27, the correlation of weekly returns between NSTS and SPY is 0.01 over 3 years, 0.28 over 1 year and 0.07 over 5 years.
Is SPY a good diversifier for NSTS?
Yes. With a correlation of 0.01, NSTS and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.01 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: NSTS correlations · SPY correlations
