LBTYA vs PULM: Correlation
How closely do Liberty Global Ltd. - Class A (LBTYA) and Pulmatrix, Inc. (PULM) trade together? Their weekly returns over three years give a correlation of 0.38, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are LBTYA and PULM?
Across a 3-year window, the weekly returns of LBTYA and PULM correlate at 0.38, moderate. The past 12 months show a weaker link (0.10) than the 3-year average (0.38). Stretching to 5 years gives 0.33, with an annualized covariance of 1684.5 %².
Within LBTYA's tracked universe of 10 assets, PULM comes in at #5 by 3-year correlation. The last year tells two different stories: LBTYA led by 58.1 percentage points, -10.6% for LBTYA against -68.7% for PULM. Note the risk asymmetry: PULM runs 4.7 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.
LBTYA vs PULM: side by side
| LBTYA (Liberty Global Ltd. - Class A) | PULM (Pulmatrix, Inc.) | |
|---|---|---|
| 1-year return | -10.6% | -68.7% |
| 5-year return | -28.1% | -90.6% |
| Volatility (ann.) | 30.5% | 144.8% |
| Beta vs S&P 500 | 0.49 | -0.18 |
| Max drawdown (3Y) | -35.7% | -88.1% |
| Market cap | $3.6B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | LBTYA | PULM |
|---|---|---|
| 2022 | -31.8% | -55.7% |
| 2023 | -6.1% | -52.1% |
| 2024 | +39.4% | +275.3% |
| 2025 | -12.7% | -68.1% |
| 2026 | -5.4% | -31.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are LBTYA and PULM good diversifiers for each other?
Reasonably. At 0.38, LBTYA and PULM keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between LBTYA and PULM?
As of 2026-08-27, the correlation of weekly returns between LBTYA and PULM is 0.38 over 3 years, 0.10 over 1 year and 0.33 over 5 years.
Is PULM a good diversifier for LBTYA?
Reasonably. At 0.38, LBTYA and PULM keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.38 mean?
A reading of 0.38 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/lbtya-vs-pulm.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/lbtya-vs-pulm/)
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Related comparisons
Hubs: LBTYA correlations · PULM correlations
