CSGP vs EBAY: Correlation
How closely do CoStar Group (CSGP) and eBay Inc. (EBAY) trade together? Their weekly returns over three years give a correlation of 0.37, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CSGP and EBAY?
Over the past 3 years, CSGP and EBAY moved with a correlation of 0.37, which is moderate. The relationship has been stable: the 1-year correlation (0.40) sits close to the 3-year figure. Over 5 years the correlation is 0.46, and the annualized covariance of weekly returns is 394.0 %².
Among the 34 assets we track against CSGP, EBAY ranks #18 by 3-year correlation. Correlation aside, the last 12 months split them widely, with EBAY ahead by 75.6 points (-65.0% versus +10.6%). The rolling one-year correlation moved between 0.30 and 0.58 over the past three years, a moderate range.
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 EBAY: side by side
| CSGP (CoStar Group) | EBAY (eBay Inc.) | |
|---|---|---|
| 1-year return | -65.0% | +10.6% |
| 5-year return | -62.7% | +43.9% |
| Volatility (ann.) | 36.5% | 28.9% |
| Beta vs S&P 500 | 0.86 | 0.58 |
| Max drawdown (3Y) | -72.2% | -20.7% |
| Market cap | $12.7B | $45.5B |
| P/E (trailing) | 174.1 | 21.9 |
| Dividend yield | 0.00% | 1.15% |
| Sector / category | Real Estate | Consumer Discretionary |
Year-by-year returns
| Year | CSGP | EBAY |
|---|---|---|
| 2022 | -2.2% | -36.5% |
| 2023 | +13.1% | +7.7% |
| 2024 | -18.1% | +44.8% |
| 2025 | -6.1% | +42.7% |
| 2026 | -53.4% | +18.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CSGP and EBAY good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.37 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between CSGP and EBAY?
Using weekly returns as of 2026-08-27: 0.37 over 3 years, with 0.40 over the last year and 0.46 over 5 years.
Is EBAY a good diversifier for CSGP?
Yes, to a useful degree: a correlation of 0.37 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.37 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/csgp-vs-ebay.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/csgp-vs-ebay/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CSGP correlations · EBAY correlations
