CI vs UNH: Correlation
How closely do Cigna (CI) and UnitedHealth Group (UNH) trade together? Their weekly returns over three years give a correlation of 0.35, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CI and UNH?
Across a 3-year window, the weekly returns of CI and UNH correlate at 0.35, moderate. Recent behaviour matches the longer record: 0.30 over 1 year against 0.35 over 3. Stretching to 5 years gives 0.41, with an annualized covariance of 375.1 %².
Among the 30 assets we track against CI, UNH ranks #16 by 3-year correlation. The last year tells two different stories: UNH led by 38.9 percentage points, -5.4% for CI against +33.5% for UNH. The relationship is regime-dependent: the rolling one-year correlation swung between 0.12 and 0.64 over the past three years, so this pair behaves very differently depending on the market environment.
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.
CI vs UNH: side by side
| CI (Cigna) | UNH (UnitedHealth Group) | |
|---|---|---|
| 1-year return | -5.4% | +33.5% |
| 5-year return | +46.7% | +3.1% |
| Volatility (ann.) | 26.7% | 39.8% |
| Beta vs S&P 500 | 0.22 | 0.17 |
| Max drawdown (3Y) | -32.1% | -61.4% |
| Market cap | $73.4B | $354.6B |
| P/E (trailing) | 11.6 | 25.8 |
| Dividend yield | 2.19% | 2.23% |
| Sector / category | Health Care | Health Care |
Year-by-year returns
| Year | CI | UNH |
|---|---|---|
| 2022 | +46.7% | +6.9% |
| 2023 | -8.0% | +0.8% |
| 2024 | -6.3% | -2.4% |
| 2025 | +1.7% | -33.1% |
| 2026 | +2.0% | +21.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CI and UNH good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.35 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between CI and UNH?
Using weekly returns as of 2026-08-27: 0.35 over 3 years, with 0.30 over the last year and 0.41 over 5 years.
Is UNH a good diversifier for CI?
Yes, to a useful degree: a correlation of 0.35 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.35 mean?
A reading of 0.35 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/ci-vs-unh.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/ci-vs-unh/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CI correlations · UNH correlations
