KEY vs STT: Correlation
KeyCorp (KEY) and State Street Corporation (STT) show a strong relationship: their 3-year correlation of weekly returns is 0.73.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are KEY and STT?
On 3 years of weekly data the KEY/STT correlation comes out at 0.73, strong. The past 12 months show a weaker link (0.62) than the 3-year average (0.73). The 5-year figure is 0.71, and annualized covariance runs at 539.8 %².
Among the 59 assets we track against KEY, STT ranks #28 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months STT outperformed by 54.3 percentage points (+18.4% for KEY against +72.7% for STT). The rolling one-year correlation moved between 0.58 and 0.85 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.
KEY vs STT: side by side
| KEY (KeyCorp) | STT (State Street Corporation) | |
|---|---|---|
| 1-year return | +18.4% | +72.7% |
| 5-year return | +38.0% | +144.9% |
| Volatility (ann.) | 32.1% | 22.9% |
| Beta vs S&P 500 | 1.25 | 0.97 |
| Max drawdown (3Y) | -32.2% | -25.7% |
| Market cap | $23.5B | $53.1B |
| P/E (trailing) | 13.0 | 17.1 |
| Dividend yield | 3.71% | 1.74% |
| Sector / category | Financials | Financials |
Year-by-year returns
| Year | KEY | STT |
|---|---|---|
| 2022 | -21.7% | -13.8% |
| 2023 | -11.5% | +3.5% |
| 2024 | +25.3% | +30.2% |
| 2025 | +26.2% | +35.5% |
| 2026 | +8.8% | +52.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are KEY and STT good diversifiers for each other?
Somewhat, no more. With 0.73 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between KEY and STT?
The KEY/STT correlation stands at 0.73 on a 3-year window (1 year: 0.62, 5 years: 0.71), computed from weekly returns as of 2026-08-27.
Is STT a good diversifier for KEY?
Somewhat, no more. With 0.73 correlation, most large moves hit both names, and the diversification benefit stays modest.
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.
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Related comparisons
Hubs: KEY correlations · STT correlations
