ACM vs GPGI: Correlation
How closely do AECOM (ACM) and GPGI, Inc. (GPGI) trade together? Their weekly returns over three years give a correlation of 0.45, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACM and GPGI?
Across a 3-year window, the weekly returns of ACM and GPGI correlate at 0.45, moderate. The relationship has been stable: the 1-year correlation (0.37) sits close to the 3-year figure. Stretching to 5 years gives 0.38, with an annualized covariance of 707.9 %².
Within ACM's tracked universe of 16 assets, GPGI comes in at #6 by 3-year correlation. On 12-month performance GPGI holds a 13.4-point edge, -46.6% against -33.2%. One caveat on sizing: GPGI is 1.8 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 GPGI: side by side
| ACM (AECOM) | GPGI (GPGI, Inc.) | |
|---|---|---|
| 1-year return | -46.6% | -33.2% |
| 5-year return | +5.2% | +66.0% |
| Volatility (ann.) | 29.1% | 53.8% |
| Beta vs S&P 500 | 0.79 | 1.14 |
| Max drawdown (3Y) | -54.1% | -55.7% |
| Market cap | $8.5B | $3.8B |
| P/E (trailing) | 22.9 | – |
| Dividend yield | 1.83% | 0.04% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACM | GPGI |
|---|---|---|
| 2022 | +10.7% | -40.2% |
| 2023 | +9.8% | +10.0% |
| 2024 | +16.7% | +197.3% |
| 2025 | -9.9% | +51.4% |
| 2026 | -29.7% | -31.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACM and GPGI good diversifiers for each other?
Reasonably. At 0.45, ACM and GPGI keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between ACM and GPGI?
The ACM/GPGI correlation stands at 0.45 on a 3-year window (1 year: 0.37, 5 years: 0.38), computed from weekly returns as of 2026-08-27.
Is GPGI a good diversifier for ACM?
Reasonably. At 0.45, ACM and GPGI keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.45 mean?
A reading of 0.45 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/acm-vs-gpgi.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/acm-vs-gpgi/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ACM correlations · GPGI correlations
