LDOS vs PULM: Correlation
How closely do Leidos (LDOS) and Pulmatrix, Inc. (PULM) trade together? Their weekly returns over three years give a correlation of -0.34, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are LDOS and PULM?
On 3 years of weekly data the LDOS/PULM correlation comes out at -0.34, negative, meaning they tend to move in opposite directions. Lately the two have moved closer together, with the 1-year correlation at 0.06 versus -0.34 over 3 years. The 5-year figure is -0.26, and annualized covariance runs at -1544.7 %².
Among the 36 assets we track against LDOS, PULM sits near the bottom by co-movement, at rank #36. Their recent paths diverged sharply: over the last 12 months LDOS outperformed by 45.8 percentage points (-22.9% for LDOS against -68.7% for PULM). Note the risk asymmetry: PULM runs 4.6 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
LDOS vs PULM: side by side
| LDOS (Leidos) | PULM (Pulmatrix, Inc.) | |
|---|---|---|
| 1-year return | -22.9% | -68.7% |
| 5-year return | +52.1% | -90.6% |
| Volatility (ann.) | 31.4% | 144.8% |
| Beta vs S&P 500 | 0.87 | -0.18 |
| Max drawdown (3Y) | -49.5% | -88.1% |
| Market cap | $17.6B | – |
| P/E (trailing) | 12.8 | – |
| Dividend yield | 1.23% | 0.00% |
| Sector / category | Industrials | US Listed |
Year-by-year returns
| Year | LDOS | PULM |
|---|---|---|
| 2022 | +20.0% | -55.7% |
| 2023 | +4.5% | -52.1% |
| 2024 | +34.5% | +275.3% |
| 2025 | +26.5% | -68.1% |
| 2026 | -22.0% | -31.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are LDOS and PULM good diversifiers for each other?
Yes. With a correlation of -0.34, LDOS and PULM have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between LDOS and PULM?
As of 2026-08-27, the correlation of weekly returns between LDOS and PULM is -0.34 over 3 years, 0.06 over 1 year and -0.26 over 5 years.
Is PULM a good diversifier for LDOS?
Yes. With a correlation of -0.34, LDOS and PULM have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.34 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/ldos-vs-pulm.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/ldos-vs-pulm/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: LDOS correlations · PULM correlations
