CSX vs UNP: Correlation
Measured on weekly returns over the past three years, CSX Corporation (CSX) and Union Pacific Corporation (UNP) 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 CSX and UNP?
Across a 3-year window, the weekly returns of CSX and UNP correlate at 0.70, strong. The relationship has been stable: the 1-year correlation (0.79) sits close to the 3-year figure. Stretching to 5 years gives 0.76, with an annualized covariance of 285.5 %².
In CSX's tracked universe of 30 assets, UNP sits right near the top at #2. Their recent paths diverged sharply: over the last 12 months CSX outperformed by 18.2 percentage points (+60.6% for CSX against +42.4% for UNP). The rolling one-year correlation stayed in a tight band between 0.59 and 0.80 over the past three years, which points to a structural rather than episodic relationship.
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.
CSX vs UNP: side by side
| CSX (CSX Corporation) | UNP (Union Pacific Corporation) | |
|---|---|---|
| 1-year return | +60.6% | +42.4% |
| 5-year return | +66.2% | +56.5% |
| Volatility (ann.) | 19.7% | 20.6% |
| Beta vs S&P 500 | 0.62 | 0.56 |
| Max drawdown (3Y) | -29.4% | -17.8% |
| Market cap | $95.5B | $182.8B |
| P/E (trailing) | 30.1 | 25.1 |
| Dividend yield | 1.04% | 1.78% |
| Sector / category | Industrials | Industrials |
Year-by-year returns
| Year | CSX | UNP |
|---|---|---|
| 2022 | -16.6% | -15.9% |
| 2023 | +13.5% | +21.6% |
| 2024 | -5.6% | -5.1% |
| 2025 | +14.1% | +3.9% |
| 2026 | +43.1% | +34.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CSX and UNP good diversifiers for each other?
To a limited degree. At 0.70 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between CSX and UNP?
The CSX/UNP correlation stands at 0.70 on a 3-year window (1 year: 0.79, 5 years: 0.76), computed from weekly returns as of 2026-08-27.
Is UNP a good diversifier for CSX?
To a limited degree. At 0.70 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.70 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/csx-vs-unp.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/csx-vs-unp/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CSX correlations · UNP correlations
