BAH vs PULM: Correlation
Measured on weekly returns over the past three years, Booz Allen Hamilton Holding Corporation (BAH) and Pulmatrix, Inc. (PULM) carry a correlation of -0.26, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BAH and PULM?
Across a 3-year window, the weekly returns of BAH and PULM correlate at -0.26, negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (0.12) runs above the 3-year figure (-0.26). Stretching to 5 years gives -0.19, with an annualized covariance of -1328.7 %².
Out of 12 assets tracked against BAH, PULM lands near the bottom at #12. Their recent paths diverged sharply: over the last 12 months BAH outperformed by 38.3 percentage points (-30.4% for BAH against -68.7% for PULM). One caveat on sizing: PULM is 4.1 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.
BAH vs PULM: side by side
| BAH (Booz Allen Hamilton Holding Corporation) | PULM (Pulmatrix, Inc.) | |
|---|---|---|
| 1-year return | -30.4% | -68.7% |
| 5-year return | +1.1% | -90.6% |
| Volatility (ann.) | 35.2% | 144.8% |
| Beta vs S&P 500 | 0.58 | -0.18 |
| Max drawdown (3Y) | -66.6% | -88.1% |
| Market cap | $9.0B | – |
| P/E (trailing) | 11.7 | – |
| Dividend yield | 3.07% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BAH | PULM |
|---|---|---|
| 2022 | +25.7% | -55.7% |
| 2023 | +24.5% | -52.1% |
| 2024 | +2.0% | +275.3% |
| 2025 | -33.0% | -68.1% |
| 2026 | -9.2% | -31.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BAH and PULM good diversifiers for each other?
By historical standards, yes. A correlation of -0.26 means the two rarely move for the same reasons.
FAQ
What is the correlation between BAH and PULM?
As of 2026-08-27, the correlation of weekly returns between BAH and PULM is -0.26 over 3 years, 0.12 over 1 year and -0.19 over 5 years.
Is PULM a good diversifier for BAH?
By historical standards, yes. A correlation of -0.26 means the two rarely move for the same reasons.
What does a correlation of -0.26 mean?
On the −1 to +1 scale, -0.26 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bah-vs-pulm.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/bah-vs-pulm/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BAH correlations · PULM correlations
