AFYA vs NBBK: Correlation
Afya Limited - Class A (AFYA) and NB Bancorp, Inc. (NBBK) show a moderate relationship: their 3-year correlation of weekly returns is 0.40.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AFYA and NBBK?
Across a 3-year window, the weekly returns of AFYA and NBBK correlate at 0.40, moderate. Little has changed lately, as the 1-year reading of 0.41 lands near the 3-year figure. Stretching to 5 years gives n/a, with an annualized covariance of 337.6 %².
NBBK is one of the assets that tracks AFYA most closely: it ranks #2 out of the 10 assets we track against AFYA. Correlation aside, the last 12 months split them widely, with NBBK ahead by 20.3 points (-1.0% versus +19.3%).
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.
AFYA vs NBBK: side by side
| AFYA (Afya Limited - Class A) | NBBK (NB Bancorp, Inc.) | |
|---|---|---|
| 1-year return | -1.0% | +19.3% |
| 5-year return | -27.6% | n/a |
| Volatility (ann.) | 30.2% | 27.6% |
| Beta vs S&P 500 | 0.56 | 0.84 |
| Max drawdown (3Y) | -40.4% | -24.7% |
| Market cap | $1.3B | $1.0B |
| P/E (trailing) | 8.5 | 14.7 |
| Dividend yield | 23.89% | 4.39% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AFYA | NBBK |
|---|---|---|
| 2022 | -0.6% | – |
| 2023 | +40.4% | – |
| 2024 | -27.6% | +34.3% |
| 2025 | -1.7% | +10.6% |
| 2026 | -3.0% | +13.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AFYA and NBBK good diversifiers for each other?
Reasonably. At 0.40, AFYA and NBBK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between AFYA and NBBK?
As of 2026-08-27, the correlation of weekly returns between AFYA and NBBK is 0.40 over 3 years, 0.41 over 1 year and n/a over 5 years.
Is NBBK a good diversifier for AFYA?
Reasonably. At 0.40, AFYA and NBBK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.40 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.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/afya-vs-nbbk.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/afya-vs-nbbk/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AFYA correlations · NBBK correlations
