CSGP vs OMC: Correlation
CoStar Group (CSGP) and Omnicom Group (OMC) show a moderate relationship: their 3-year correlation of weekly returns is 0.51.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CSGP and OMC?
Across a 3-year window, the weekly returns of CSGP and OMC correlate at 0.51, moderate. Little has changed lately, as the 1-year reading of 0.55 lands near the 3-year figure. Stretching to 5 years gives 0.42, with an annualized covariance of 517.4 %².
OMC is one of the assets that tracks CSGP most closely: it ranks #2 out of the 34 assets we track against CSGP. Correlation aside, the last 12 months split them widely, with OMC ahead by 81.5 points (-65.0% versus +16.5%). The relationship is regime-dependent: the rolling one-year correlation swung between 0.17 and 0.68 over the past three years, so this pair behaves very differently depending on the market environment.
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.
CSGP vs OMC: side by side
| CSGP (CoStar Group) | OMC (Omnicom Group) | |
|---|---|---|
| 1-year return | -65.0% | +16.5% |
| 5-year return | -62.7% | +45.6% |
| Volatility (ann.) | 36.5% | 28.0% |
| Beta vs S&P 500 | 0.86 | 0.76 |
| Max drawdown (3Y) | -72.2% | -33.3% |
| Market cap | $12.7B | $24.1B |
| P/E (trailing) | 174.1 | 237.5 |
| Dividend yield | 0.00% | 3.53% |
| Sector / category | Real Estate | Communication Services |
Year-by-year returns
| Year | CSGP | OMC |
|---|---|---|
| 2022 | -2.2% | +15.7% |
| 2023 | +13.1% | +9.6% |
| 2024 | -18.1% | +2.5% |
| 2025 | -6.1% | -2.6% |
| 2026 | -53.4% | +11.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CSGP and OMC good diversifiers for each other?
To a limited degree. At 0.51 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between CSGP and OMC?
The CSGP/OMC correlation stands at 0.51 on a 3-year window (1 year: 0.55, 5 years: 0.42), computed from weekly returns as of 2026-08-27.
Is OMC a good diversifier for CSGP?
To a limited degree. At 0.51 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.51 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.
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Related comparisons
Hubs: CSGP correlations · OMC correlations
