PULM vs QQQ: Correlation
Pulmatrix, Inc. (PULM) and Invesco QQQ Trust (QQQ) show a near-zero relationship: their 3-year correlation of weekly returns is -0.05.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PULM and QQQ?
Across a 3-year window, the weekly returns of PULM and QQQ correlate at -0.05, near zero, meaning they move largely independently. The past 12 months show a tighter link (0.10) than the 3-year average (-0.05). Stretching to 5 years gives 0.03, with an annualized covariance of -148.3 %².
By 3-year correlation, QQQ places #13 of the 37 assets tracked against PULM. Their recent paths diverged sharply: over the last 12 months QQQ outperformed by 95.0 percentage points (-68.7% for PULM against +26.3% for QQQ). One caveat on sizing: PULM is 7.4 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.
PULM vs QQQ: side by side
| PULM (Pulmatrix, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | -68.7% | +26.3% |
| 5-year return | -90.6% | +95.4% |
| Volatility (ann.) | 144.8% | 19.6% |
| Beta vs S&P 500 | -0.18 | 1.28 |
| Max drawdown (3Y) | -88.1% | -22.8% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 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 | PULM | QQQ |
|---|---|---|
| 2022 | -55.7% | -32.6% |
| 2023 | -52.1% | +54.9% |
| 2024 | +275.3% | +25.6% |
| 2025 | -68.1% | +20.8% |
| 2026 | -31.8% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PULM and QQQ good diversifiers for each other?
By historical standards, yes. A correlation of -0.05 means the two rarely move for the same reasons.
FAQ
What is the correlation between PULM and QQQ?
As of 2026-08-27, the correlation of weekly returns between PULM and QQQ is -0.05 over 3 years, 0.10 over 1 year and 0.03 over 5 years.
Is QQQ a good diversifier for PULM?
By historical standards, yes. A correlation of -0.05 means the two rarely move for the same reasons.
What does a correlation of -0.05 mean?
A reading of -0.05 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/pulm-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/pulm-vs-qqq/)
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Related comparisons
Hubs: PULM correlations · QQQ correlations
