NBBK vs QQQ: Correlation
NB Bancorp, Inc. (NBBK) and Invesco QQQ Trust (QQQ) show a moderate relationship: their 3-year correlation of weekly returns is 0.30.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NBBK and QQQ?
Across a 3-year window, the weekly returns of NBBK and QQQ correlate at 0.30, moderate. The past 12 months show a weaker link (0.03) than the 3-year average (0.30). Stretching to 5 years gives n/a, with an annualized covariance of 164.2 %².
Out of 17 assets tracked against NBBK, QQQ lands near the bottom at #13. Over the last 12 months QQQ came out ahead by 7.0 percentage points (+19.3% against +26.3%).
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.
NBBK vs QQQ: side by side
| NBBK (NB Bancorp, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +19.3% | +26.3% |
| 5-year return | n/a | +95.4% |
| Volatility (ann.) | 27.6% | 19.6% |
| Beta vs S&P 500 | 0.84 | 1.28 |
| Max drawdown (3Y) | -24.7% | -22.8% |
| Market cap | $1.0B | – |
| P/E (trailing) | 14.7 | – |
| Dividend yield | 4.39% | 0.44% |
| Expense ratio | – | 0.18% |
| Assets under management | – | $452.8B |
| Sector / category | US Listed | ETF · US Growth & Tech |
QQQ is a Large Growth fund from Invesco: $452.8B under management, 104 holdings, a 0.18% expense ratio, a 0.44% trailing dividend yield.
Year-by-year returns
| Year | NBBK | QQQ |
|---|---|---|
| 2022 | – | -32.6% |
| 2023 | – | +54.9% |
| 2024 | +34.3% | +25.6% |
| 2025 | +10.6% | +20.8% |
| 2026 | +13.9% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NBBK and QQQ good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.30 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between NBBK and QQQ?
As of 2026-08-27, the correlation of weekly returns between NBBK and QQQ is 0.30 over 3 years, 0.03 over 1 year and n/a over 5 years.
Is QQQ a good diversifier for NBBK?
Yes, to a useful degree: a correlation of 0.30 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.30 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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Hubs: NBBK correlations · QQQ correlations
