GRC vs MAMO: Correlation
Measured on weekly returns over the past three years, Gorman-Rupp Company (The) (GRC) and Massimo Group (MAMO) carry a correlation of -0.22, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are GRC and MAMO?
On 3 years of weekly data the GRC/MAMO correlation comes out at -0.22, negative, meaning they tend to move in opposite directions. The past 12 months show a weaker link (-0.43) than the 3-year average (-0.22). The 5-year figure is n/a, and annualized covariance runs at -615.9 %².
MAMO is close to the least connected end of GRC's tracked universe, ranking #12 of 14. Correlation aside, the last 12 months split them widely, with GRC ahead by 148.5 points (+82.4% versus -66.1%). Note the risk asymmetry: MAMO runs 2.9 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.
GRC vs MAMO: side by side
| GRC (Gorman-Rupp Company (The)) | MAMO (Massimo Group) | |
|---|---|---|
| 1-year return | +82.4% | -66.1% |
| 5-year return | +143.0% | n/a |
| Volatility (ann.) | 30.6% | 87.3% |
| Beta vs S&P 500 | 0.85 | 0.53 |
| Max drawdown (3Y) | -26.9% | -83.6% |
| Market cap | $2.0B | – |
| P/E (trailing) | 32.7 | 10.0 |
| Dividend yield | 0.97% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | GRC | MAMO |
|---|---|---|
| 2022 | -41.2% | – |
| 2023 | +42.2% | – |
| 2024 | +8.9% | – |
| 2025 | +28.2% | +54.9% |
| 2026 | +63.7% | -74.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are GRC and MAMO good diversifiers for each other?
By historical standards, yes. A correlation of -0.22 means the two rarely move for the same reasons.
FAQ
What is the correlation between GRC and MAMO?
The GRC/MAMO correlation stands at -0.22 on a 3-year window (1 year: -0.43, 5 years: n/a), computed from weekly returns as of 2026-08-27.
Is MAMO a good diversifier for GRC?
By historical standards, yes. A correlation of -0.22 means the two rarely move for the same reasons.
What does a correlation of -0.22 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/grc-vs-mamo.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/grc-vs-mamo/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: GRC correlations · MAMO correlations
