MPC vs PSX: Correlation
Measured on weekly returns over the past three years, Marathon Petroleum (MPC) and Phillips 66 (PSX) carry a correlation of 0.88, a very strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MPC and PSX?
On 3 years of weekly data the MPC/PSX correlation comes out at 0.88, very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.93 over 1 year against 0.88 over 3. The 5-year figure is 0.85, and annualized covariance runs at 999.8 %².
Few assets follow MPC as closely as PSX, which ranks #1 of 29 tracked partners. The last year tells two different stories: MPC led by 21.6 percentage points, +107.8% for MPC against +86.2% for PSX. The link looks structural: the rolling one-year correlation barely moved, holding between 0.75 and 0.92.
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.
MPC vs PSX: side by side
| MPC (Marathon Petroleum) | PSX (Phillips 66) | |
|---|---|---|
| 1-year return | +107.8% | +86.2% |
| 5-year return | +589.6% | +301.8% |
| Volatility (ann.) | 34.2% | 33.4% |
| Beta vs S&P 500 | 0.48 | 0.58 |
| Max drawdown (3Y) | -44.7% | -44.4% |
| Market cap | $102.1B | $96.1B |
| P/E (trailing) | 12.6 | 13.8 |
| Dividend yield | 1.10% | 2.04% |
| Sector / category | Energy | Energy |
Year-by-year returns
| Year | MPC | PSX |
|---|---|---|
| 2022 | +86.6% | +49.6% |
| 2023 | +30.5% | +33.1% |
| 2024 | -4.1% | -11.6% |
| 2025 | +19.2% | +17.5% |
| 2026 | +126.1% | +89.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MPC and PSX good diversifiers for each other?
No. With a correlation of 0.88, MPC and PSX move nearly in lockstep, so holding both adds very little diversification.
FAQ
What is the correlation between MPC and PSX?
The MPC/PSX correlation stands at 0.88 on a 3-year window (1 year: 0.93, 5 years: 0.85), computed from weekly returns as of 2026-08-27.
Is PSX a good diversifier for MPC?
No. With a correlation of 0.88, MPC and PSX move nearly in lockstep, so holding both adds very little diversification.
What does a correlation of 0.88 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/mpc-vs-psx.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/mpc-vs-psx/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: MPC correlations · PSX correlations
