NTRS vs SEIC: Correlation
Northern Trust (NTRS) and SEI Investments Company (SEIC) show a strong relationship: their 3-year correlation of weekly returns is 0.66.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NTRS and SEIC?
Over the past 3 years, NTRS and SEIC moved with a correlation of 0.66, which is strong. The past 12 months show a weaker link (0.45) than the 3-year average (0.66). Over 5 years the correlation is 0.70, and the annualized covariance of weekly returns is 323.4 %².
By 3-year correlation, SEIC places #18 of the 33 assets tracked against NTRS. Their recent paths diverged sharply: over the last 12 months NTRS outperformed by 20.4 percentage points (+44.8% for NTRS against +24.4% for SEIC).
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.
NTRS vs SEIC: side by side
| NTRS (Northern Trust) | SEIC (SEI Investments Company) | |
|---|---|---|
| 1-year return | +44.8% | +24.4% |
| 5-year return | +83.2% | +89.5% |
| Volatility (ann.) | 23.7% | 20.7% |
| Beta vs S&P 500 | 1.08 | 0.91 |
| Max drawdown (3Y) | -25.2% | -23.3% |
| Market cap | $34.1B | $13.4B |
| P/E (trailing) | 16.1 | 19.6 |
| Dividend yield | 1.71% | 0.94% |
| Sector / category | Financials | US Listed |
Year-by-year returns
| Year | NTRS | SEIC |
|---|---|---|
| 2022 | -23.8% | -2.9% |
| 2023 | -1.0% | +10.6% |
| 2024 | +25.6% | +31.5% |
| 2025 | +36.9% | +0.6% |
| 2026 | +37.8% | +36.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NTRS and SEIC good diversifiers for each other?
Only partially. A correlation of 0.66 means NTRS and SEIC 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 NTRS and SEIC?
As of 2026-08-27, the correlation of weekly returns between NTRS and SEIC is 0.66 over 3 years, 0.45 over 1 year and 0.70 over 5 years.
Is SEIC a good diversifier for NTRS?
Only partially. A correlation of 0.66 means NTRS and SEIC share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.66 mean?
On the −1 to +1 scale, 0.66 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: NTRS correlations · SEIC correlations
