COF vs KEY: Correlation
Capital One (COF) and KeyCorp (KEY) show a strong relationship: their 3-year correlation of weekly returns is 0.75.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COF and KEY?
Over the past 3 years, COF and KEY moved with a correlation of 0.75, which is strong. The link has loosened recently: the 1-year correlation (0.62) runs below the 3-year figure (0.75). Over 5 years the correlation is 0.76, and the annualized covariance of weekly returns is 734.4 %².
Among the 29 assets we track against COF, KEY ranks #8 by 3-year correlation. The last year tells two different stories: KEY led by 20.4 percentage points, -2.0% for COF against +18.4% for KEY. The link looks structural: the rolling one-year correlation barely moved, holding between 0.62 and 0.83.
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.
COF vs KEY: side by side
| COF (Capital One) | KEY (KeyCorp) | |
|---|---|---|
| 1-year return | -2.0% | +18.4% |
| 5-year return | +43.2% | +38.0% |
| Volatility (ann.) | 30.6% | 32.1% |
| Beta vs S&P 500 | 1.28 | 1.25 |
| Max drawdown (3Y) | -31.5% | -32.2% |
| Market cap | $132.9B | $23.5B |
| P/E (trailing) | 12.0 | 13.0 |
| Dividend yield | 1.38% | 3.71% |
| Sector / category | Financials | Financials |
Year-by-year returns
| Year | COF | KEY |
|---|---|---|
| 2022 | -34.6% | -21.7% |
| 2023 | +44.3% | -11.5% |
| 2024 | +38.2% | +25.3% |
| 2025 | +37.6% | +26.2% |
| 2026 | -9.6% | +8.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COF and KEY good diversifiers for each other?
Somewhat, no more. With 0.75 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between COF and KEY?
As of 2026-08-27, the correlation of weekly returns between COF and KEY is 0.75 over 3 years, 0.62 over 1 year and 0.76 over 5 years.
Is KEY a good diversifier for COF?
Somewhat, no more. With 0.75 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.75 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/cof-vs-key.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/cof-vs-key/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: COF correlations · KEY correlations
