ACM vs OLMA: Correlation
Measured on weekly returns over the past three years, AECOM (ACM) and Olema Pharmaceuticals, Inc. (OLMA) carry a correlation of -0.24, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACM and OLMA?
Over the past 3 years, ACM and OLMA moved with a correlation of -0.24, which is negative, meaning they tend to move in opposite directions. The link has loosened recently: the 1-year correlation (-0.40) runs below the 3-year figure (-0.24). Over 5 years the correlation is -0.07, and the annualized covariance of weekly returns is -925.7 %².
Within ACM's tracked universe of 16 assets, OLMA comes in at #11 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months OLMA outperformed by 134.6 percentage points (-46.6% for ACM against +88.0% for OLMA). One caveat on sizing: OLMA is 4.6 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.
ACM vs OLMA: side by side
| ACM (AECOM) | OLMA (Olema Pharmaceuticals, Inc.) | |
|---|---|---|
| 1-year return | -46.6% | +88.0% |
| 5-year return | +5.2% | -64.1% |
| Volatility (ann.) | 29.1% | 133.2% |
| Beta vs S&P 500 | 0.79 | 1.18 |
| Max drawdown (3Y) | -54.1% | -82.1% |
| Market cap | $8.5B | $0.9B |
| P/E (trailing) | 22.9 | – |
| Dividend yield | 1.83% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACM | OLMA |
|---|---|---|
| 2022 | +10.7% | -73.8% |
| 2023 | +9.8% | +472.7% |
| 2024 | +16.7% | -58.4% |
| 2025 | -9.9% | +328.8% |
| 2026 | -29.7% | -56.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACM and OLMA good diversifiers for each other?
By historical standards, yes. A correlation of -0.24 means the two rarely move for the same reasons.
FAQ
What is the correlation between ACM and OLMA?
Using weekly returns as of 2026-08-27: -0.24 over 3 years, with -0.40 over the last year and -0.07 over 5 years.
Is OLMA a good diversifier for ACM?
By historical standards, yes. A correlation of -0.24 means the two rarely move for the same reasons.
What does a correlation of -0.24 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/acm-vs-olma.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/acm-vs-olma/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ACM correlations · OLMA correlations
