MPWR vs PULM: Correlation
Measured on weekly returns over the past three years, Monolithic Power Systems (MPWR) and Pulmatrix, Inc. (PULM) carry a correlation of -0.23, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MPWR and PULM?
Across a 3-year window, the weekly returns of MPWR and PULM correlate at -0.23, negative, meaning they tend to move in opposite directions. The past 12 months show a tighter link (0.14) than the 3-year average (-0.23). Stretching to 5 years gives -0.11, with an annualized covariance of -1577.8 %².
PULM is close to the least connected end of MPWR's tracked universe, ranking #37 of 41. Their recent paths diverged sharply: over the last 12 months MPWR outperformed by 121.1 percentage points (+52.4% for MPWR against -68.7% for PULM). One caveat on sizing: PULM is 3.0 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.
MPWR vs PULM: side by side
| MPWR (Monolithic Power Systems) | PULM (Pulmatrix, Inc.) | |
|---|---|---|
| 1-year return | +52.4% | -68.7% |
| 5-year return | +170.3% | -90.6% |
| Volatility (ann.) | 48.1% | 144.8% |
| Beta vs S&P 500 | 2.22 | -0.18 |
| Max drawdown (3Y) | -51.6% | -88.1% |
| Market cap | $64.4B | – |
| P/E (trailing) | 79.4 | – |
| Dividend yield | 0.55% | 0.00% |
| Sector / category | Information Technology | US Listed |
Year-by-year returns
| Year | MPWR | PULM |
|---|---|---|
| 2022 | -27.8% | -55.7% |
| 2023 | +79.8% | -52.1% |
| 2024 | -5.6% | +275.3% |
| 2025 | +54.5% | -68.1% |
| 2026 | +45.2% | -31.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MPWR and PULM good diversifiers for each other?
By historical standards, yes. A correlation of -0.23 means the two rarely move for the same reasons.
FAQ
What is the correlation between MPWR and PULM?
As of 2026-08-27, the correlation of weekly returns between MPWR and PULM is -0.23 over 3 years, 0.14 over 1 year and -0.11 over 5 years.
Is PULM a good diversifier for MPWR?
By historical standards, yes. A correlation of -0.23 means the two rarely move for the same reasons.
What does a correlation of -0.23 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/mpwr-vs-pulm.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/mpwr-vs-pulm/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: MPWR correlations · PULM correlations
