PSX vs. MPC

Last updated Jun 3, 2026

PSX (Phillips 66) and MPC (Marathon Petroleum Corporation) are both stocks. Both operate in the Oil & Gas Refining & Marketing industry within the Energy sector. Over the past 10 years, PSX returned 12.75%/yr vs 25.97%/yr for MPC. A 0.77 correlation means they provide meaningful diversification when combined.

Performance

PSX vs. MPC - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Phillips 66 (PSX) and Marathon Petroleum Corporation (MPC). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PSX achieves a 43.67% return, which is significantly lower than MPC's 63.18% return. Over the past 10 years, PSX has underperformed MPC with an annualized return of 12.75%, while MPC has yielded a comparatively higher 25.97% annualized return.

PSX

• 1D: 1.29%
• 1M: 4.37%
• YTD: 43.67%
• 6M: 34.77%
• 1Y: 65.22%
• 3Y*: 27.76%
• 5Y*: 19.84%
• 10Y*: 12.75%

MPC

• 1D: 1.70%
• 1M: 7.28%
• YTD: 63.18%
• 6M: 37.72%
• 1Y: 68.95%
• 3Y*: 36.95%
• 5Y*: 36.17%
• 10Y*: 25.97%

*Multi-year figures are annualized to reflect compound growth (CAGR)

PSX vs. MPC - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PSX Phillips 66	43.67%	17.51%	-11.63%	33.07%	49.58%	8.51%	-33.85%	33.97%	-12.28%	20.94%
MPC Marathon Petroleum Corporation	63.18%	19.17%	-4.06%	30.46%	86.62%	61.00%	-27.38%	6.05%	-8.23%	34.78%

Correlation

The correlation between PSX and MPC is 0.80, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.80
Correlation (3Y) Calculated over the trailing 3-year period	0.80
Correlation (5Y) Calculated over the trailing 5-year period	0.82
Correlation (10Y) Calculated over the trailing 10-year period	0.78
Correlation (All Time) Calculated using the full available price history since May 2, 2012	0.77

The correlation between PSX and MPC has been stable across timeframes, ranging from 0.77 to 0.82 - a consistent structural relationship.

Fundamentals

Market Cap PSX : $73.62B MPC : $77.60B
EPS PSX : $10.17 MPC : $15.35
PE Ratio PSX : 17.95 MPC : 17.14
PEG Ratio PSX : 0.10 MPC : 0.08
PS Ratio PSX : 0.55 MPC : 0.58
PB Ratio PSX : 2.58 MPC : 4.63
Total Revenue (TTM) PSX : $134.70B MPC : $135.75B
Gross Profit (TTM) PSX : $5.94B MPC : $11.95B
EBITDA (TTM) PSX : $9.17B MPC : $12.39B

Return for Risk

PSX vs. MPC — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

PSX

PSX Risk / Return Rank: 87
PSX Sharpe Ratio Rank: 89
PSX Sortino Ratio Rank: 86
PSX Omega Ratio Rank: 85
PSX Calmar Ratio Rank: 86
PSX Martin Ratio Rank: 88

MPC

MPC Risk / Return Rank: 86
MPC Sharpe Ratio Rank: 89
MPC Sortino Ratio Rank: 85
MPC Omega Ratio Rank: 85
MPC Calmar Ratio Rank: 85
MPC Martin Ratio Rank: 86

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

PSX vs. MPC - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Phillips 66 (PSX) and Marathon Petroleum Corporation (MPC). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	PSX	MPC	Difference
Sharpe ratio Return per unit of total volatility	2.21	2.20	+0.01
Sortino ratio Return per unit of downside risk	2.87	2.75	+0.12
Omega ratio Gain probability vs. loss probability	1.36	1.37	0.00
Calmar ratio Return relative to maximum drawdown	3.84	3.65	+0.19
Martin ratio Return relative to average drawdown	11.14	9.65	+1.48
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PSX vs. MPC - Sharpe Ratio Comparison

The current PSX Sharpe Ratio is 2.21, which is comparable to the MPC Sharpe Ratio of 2.20. The chart below compares the historical Sharpe Ratios of PSX and MPC, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	PSX	MPC	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.21	2.20	+0.01
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	1.10	-0.50
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.36	0.65	-0.29
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	0.56	-0.05

Drawdowns

PSX vs. MPC - Drawdown Comparison

The maximum PSX drawdown since its inception was -64.21%, smaller than the maximum MPC drawdown of -79.67%. Use the drawdown chart below to compare losses from any high point for PSX and MPC.

Drawdown Indicators

	PSX	MPC	Difference
Max Drawdown Largest peak-to-trough decline	-64.21%	-79.67%	+15.46%
Max Drawdown (1Y) Largest decline over 1 year	-17.28%	-18.33%	+1.05%
Max Drawdown (3Y) Largest decline over 3 years	-44.37%	-44.75%	+0.38%
Max Drawdown (5Y) Largest decline over 5 years	-44.37%	-44.75%	+0.38%
Max Drawdown (10Y) Largest decline over 10 years	-64.21%	-79.67%	+15.46%
Current Drawdown Current decline from peak	-2.33%	0.00%	-2.33%
Average Drawdown Average peak-to-trough decline	-14.75%	-17.37%	+2.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.96%	6.93%	-0.97%

Volatility

PSX vs. MPC - Volatility Comparison

The current volatility for Phillips 66 (PSX) is 9.68%, while Marathon Petroleum Corporation (MPC) has a volatility of 11.47%. This indicates that PSX experiences smaller price fluctuations and is considered to be less risky than MPC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PSX	MPC	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.68%	11.47%	-1.79%
Volatility (6M) Calculated over the trailing 6-month period	23.73%	25.79%	-2.06%
Volatility (1Y) Calculated over the trailing 1-year period	29.65%	31.50%	-1.85%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	33.22%	33.03%	+0.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	35.32%	40.27%	-4.95%

Dividends

PSX vs. MPC - Dividend Comparison

PSX's dividend yield for the trailing twelve months is around 2.71%, more than MPC's 1.49% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MPC Marathon Petroleum Corporation	1.49%	2.29%	2.43%	2.07%	2.14%	3.63%	5.61%	3.52%	3.12%	2.30%	2.70%	2.20%
PSX Phillips 66	2.71%	3.68%	3.95%	3.15%	3.68%	5.00%	5.15%	3.14%	3.60%	2.70%	2.84%	2.67%

Financials

PSX vs. MPC - Profitability Comparison

The chart below illustrates the profitability comparison between Phillips 66 and Marathon Petroleum Corporation over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

PSX - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Phillips 66 reported a gross profit of 0.00 and revenue of 33.00B. Therefore, the gross margin over that period was 0.0%.

MPC - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Marathon Petroleum Corporation reported a gross profit of 3.31B and revenue of 34.57B. Therefore, the gross margin over that period was 9.6%.

PSX - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Phillips 66 reported an operating income of 0.00 and revenue of 33.00B, resulting in an operating margin of 0.0%.

MPC - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Marathon Petroleum Corporation reported an operating income of 1.40B and revenue of 34.57B, resulting in an operating margin of 4.1%.

PSX - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Phillips 66 reported a net income of 207.00M and revenue of 33.00B, resulting in a net margin of 0.6%.

MPC - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Marathon Petroleum Corporation reported a net income of 511.00M and revenue of 34.57B, resulting in a net margin of 1.5%.

Frequently Asked Questions

Can I hold both PSX and MPC in my portfolio?

PSX and MPC have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PSX or MPC?

MPC has higher volatility (11.47%) compared to PSX (9.68%). In terms of maximum drawdown, PSX dropped -64.21% vs MPC's -79.67%.

Which has better risk-adjusted returns?

PSX currently has the higher Sharpe Ratio (2.21 vs 2.20), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.