BPRN vs SPY: Correlation
How closely do Princeton Bancorp, Inc. (BPRN) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.39, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BPRN and SPY?
Over the past 3 years, BPRN and SPY moved with a correlation of 0.39, which is moderate. The link has loosened recently: the 1-year correlation (0.22) runs below the 3-year figure (0.39). Over 5 years the correlation is 0.34, and the annualized covariance of weekly returns is 156.8 %².
By 3-year correlation, SPY places #6 of the 11 assets tracked against BPRN. Over the last 12 months BPRN came out ahead by 8.5 percentage points (+29.1% against +20.6%). One caveat on sizing: BPRN is 1.9 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
BPRN vs SPY: side by side
| BPRN (Princeton Bancorp, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +29.1% | +20.6% |
| 5-year return | +66.1% | +82.4% |
| Volatility (ann.) | 27.6% | 14.5% |
| Beta vs S&P 500 | 0.75 | 1.00 |
| Max drawdown (3Y) | -28.2% | -18.8% |
| Market cap | $0.3B | – |
| P/E (trailing) | 11.2 | – |
| Dividend yield | 3.19% | 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 | BPRN | SPY |
|---|---|---|
| 2022 | +11.8% | -18.2% |
| 2023 | +17.7% | +26.2% |
| 2024 | -0.6% | +24.9% |
| 2025 | +4.8% | +17.7% |
| 2026 | +25.1% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BPRN and SPY good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.39 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between BPRN and SPY?
Using weekly returns as of 2026-08-27: 0.39 over 3 years, with 0.22 over the last year and 0.34 over 5 years.
Is SPY a good diversifier for BPRN?
Yes, to a useful degree: a correlation of 0.39 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.39 mean?
A reading of 0.39 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: BPRN correlations · SPY correlations
