NBBK vs PFS: Correlation
How closely do NB Bancorp, Inc. (NBBK) and Provident Financial Services, Inc (PFS) trade together? Their weekly returns over three years give a correlation of 0.76, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NBBK and PFS?
Across a 3-year window, the weekly returns of NBBK and PFS correlate at 0.76, strong. The relationship has been stable: the 1-year correlation (0.71) sits close to the 3-year figure. Stretching to 5 years gives n/a, with an annualized covariance of 617.8 %².
Within NBBK's tracked universe of 17 assets, PFS comes in at #4 by 3-year correlation. Their 12-month results are close: +19.3% for NBBK against +23.9% for PFS.
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.
NBBK vs PFS: side by side
| NBBK (NB Bancorp, Inc.) | PFS (Provident Financial Services, Inc) | |
|---|---|---|
| 1-year return | +19.3% | +23.9% |
| 5-year return | n/a | +37.5% |
| Volatility (ann.) | 27.6% | 30.4% |
| Beta vs S&P 500 | 0.84 | 0.87 |
| Max drawdown (3Y) | -24.7% | -31.3% |
| Market cap | $1.0B | $3.1B |
| P/E (trailing) | 14.7 | 9.8 |
| Dividend yield | 4.39% | 2.04% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NBBK | PFS |
|---|---|---|
| 2022 | – | -8.0% |
| 2023 | – | -10.8% |
| 2024 | +34.3% | +10.7% |
| 2025 | +10.6% | +10.2% |
| 2026 | +13.9% | +23.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NBBK and PFS good diversifiers for each other?
To a limited degree. At 0.76 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between NBBK and PFS?
Using weekly returns as of 2026-08-27: 0.76 over 3 years, with 0.71 over the last year and n/a over 5 years.
Is PFS a good diversifier for NBBK?
To a limited degree. At 0.76 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.76 mean?
A reading of 0.76 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/nbbk-vs-pfs.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/nbbk-vs-pfs/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: NBBK correlations · PFS correlations
