BNY vs STT: Correlation
Measured on weekly returns over the past three years, BNY Mellon (BNY) and State Street Corporation (STT) carry a correlation of 0.70, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BNY and STT?
Across a 3-year window, the weekly returns of BNY and STT correlate at 0.70, strong. Little has changed lately, as the 1-year reading of 0.74 lands near the 3-year figure. Stretching to 5 years gives 0.82, with an annualized covariance of 324.9 %².
By 3-year correlation, STT places #11 of the 31 assets tracked against BNY. The last year tells two different stories: STT led by 15.5 percentage points, +57.2% for BNY against +72.7% for STT. On a rolling one-year basis the correlation drifted between 0.50 and 0.92, a moderate band.
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.
BNY vs STT: side by side
| BNY (BNY Mellon) | STT (State Street Corporation) | |
|---|---|---|
| 1-year return | +57.2% | +72.7% |
| 5-year return | +236.7% | +144.9% |
| Volatility (ann.) | 20.2% | 22.9% |
| Beta vs S&P 500 | 0.89 | 0.97 |
| Max drawdown (3Y) | -17.6% | -25.7% |
| Market cap | $110.1B | $53.1B |
| P/E (trailing) | 19.0 | 17.1 |
| Dividend yield | 1.30% | 1.74% |
| Sector / category | Financials | Financials |
Year-by-year returns
| Year | BNY | STT |
|---|---|---|
| 2022 | -19.1% | -13.8% |
| 2023 | +18.5% | +3.5% |
| 2024 | +51.9% | +30.2% |
| 2025 | +54.4% | +35.5% |
| 2026 | +41.5% | +52.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BNY and STT good diversifiers for each other?
Somewhat, no more. With 0.70 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between BNY and STT?
As of 2026-08-27, the correlation of weekly returns between BNY and STT is 0.70 over 3 years, 0.74 over 1 year and 0.82 over 5 years.
Is STT a good diversifier for BNY?
Somewhat, no more. With 0.70 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.70 mean?
On the −1 to +1 scale, 0.70 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: BNY correlations · STT correlations
