ALLY vs KEY: Correlation
How closely do Ally Financial Inc. (ALLY) and KeyCorp (KEY) trade together? Their weekly returns over three years give a correlation of 0.73, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ALLY and KEY?
Across a 3-year window, the weekly returns of ALLY and KEY correlate at 0.73, strong. The relationship has been stable: the 1-year correlation (0.66) sits close to the 3-year figure. Stretching to 5 years gives 0.70, with an annualized covariance of 811.9 %².
Few assets follow ALLY as closely as KEY, which ranks #3 of 14 tracked partners. On 12-month performance KEY holds a 11.3-point edge, +7.1% against +18.4%.
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.
ALLY vs KEY: side by side
| ALLY (Ally Financial Inc.) | KEY (KeyCorp) | |
|---|---|---|
| 1-year return | +7.1% | +18.4% |
| 5-year return | -2.7% | +38.0% |
| Volatility (ann.) | 34.5% | 32.1% |
| Beta vs S&P 500 | 1.22 | 1.25 |
| Max drawdown (3Y) | -31.6% | -32.2% |
| Market cap | $13.0B | $23.5B |
| P/E (trailing) | 10.0 | 13.0 |
| Dividend yield | 2.82% | 3.71% |
| Sector / category | US Listed | Financials |
Year-by-year returns
| Year | ALLY | KEY |
|---|---|---|
| 2022 | -46.9% | -21.7% |
| 2023 | +49.2% | -11.5% |
| 2024 | +6.4% | +25.3% |
| 2025 | +29.9% | +26.2% |
| 2026 | -3.6% | +8.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ALLY and KEY good diversifiers for each other?
Only partially. A correlation of 0.73 means ALLY and KEY share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between ALLY and KEY?
Using weekly returns as of 2026-08-27: 0.73 over 3 years, with 0.66 over the last year and 0.70 over 5 years.
Is KEY a good diversifier for ALLY?
Only partially. A correlation of 0.73 means ALLY and KEY share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.73 mean?
On the −1 to +1 scale, 0.73 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/ally-vs-key.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/ally-vs-key/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: ALLY correlations · KEY correlations
