Volatility is a statistical measure of the dispersion of returns for a given security or market index, it shows how the price swings around its mean. The volatility here is measured as the annualized standard deviation between monthly returns from the security over the past year. In most cases, the higher the volatility, the riskier the security.
Volatility is a statistical measure of the dispersion of returns for a given security or market index. It’s often measured as standard deviation or variance of historical returns over a certain period. The volatility here is measured as the annualized standard deviation between monthly returns from the security over the past year.
Volatility reflects the uncertainty or risk of a security’s value. Generally speaking, a higher volatility suggests a higher risk, because it implies a wider fluctuation around average price. This means the price of the security can change dramatically in either direction within a short period. Conversely, a lower volatility means that the security's price is more steady, which suggests a lower risk.
Another measurement of relative volatility is Beta. Beta is a measure of systematic risk of a security or a portfolio in comparison to the market as a whole. Beta is usually compared to 1. A beta of greater than 1 indicates that the security's price will be more volatile than the market.
Marathon Petroleum Volatility Related Terms
MIL:1MPC vs VLO, PSX, DINO: Volatility Comparison
For the Oil & Gas Refining & Marketing subindustry, Marathon Petroleum's Volatility, along with its competitors' market caps and Volatility data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Marathon Petroleum Volatility vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Marathon Petroleum's Volatility distribution charts can be found below:
* The bar in red indicates where Marathon Petroleum's Volatility falls into.
The annualized volatility is calculated as following:
σA
=
σM
*
√12
=
√ 1/(n-1) ∑(Ri - R')^2
*
√12
Where: σM is the monthly volatility, n is the number of months in the period, Ri is the security's historical monthly returns and R' is the arithmetic mean of monthly returns.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Marathon Petroleum (MIL:1MPC) has a Volatility of 37.39% as of Jun. 25, 2026. Volatility is measured as the annualized standard deviation between monthly returns from the security over the past year. View historical data on Marathon Petroleum and its competitors.
Is Marathon Petroleum's Volatility too high?
Marathon Petroleum's current Volatility is 37.39%. Overall, Marathon Petroleum has a GF Score™ of 50/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Marathon Petroleum's Volatility compare to VLO and PSX?
Marathon Petroleum's Volatility of 37.39% can be compared against companies in the Oil & Gas industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Volatility for an Oil & Gas company?
A good Volatility depends on the Oil & Gas industry context. However, Volatility should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Volatility mean?
A high Volatility can signal that a stock is expensive relative to its fundamentals. Volatility is measured as the annualized standard deviation between monthly returns from the security over the past year. View historical data on Marathon Petroleum and its competitors. Marathon Petroleum's current Volatility is 37.39%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Marathon Petroleum stock overvalued right now?
Based on GuruFocus' analysis, Marathon Petroleum (MIL:1MPC) is currently considered Modestly Overvalued. The stock's GF Value™ is €179.29, compared to a current price of €214.10 — trading 19.4% above its estimated fair value. The current Volatility is 37.39%. Marathon Petroleum's overall GF Score™ is 50/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Volatility calculated?
Volatility is calculated from a company's financial statements. For Marathon Petroleum (MIL:1MPC), the current Volatility is 37.39% as of Jun. 25, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Marathon Petroleum (MIL:1MPC) Overvalued in 2026?
Based on GuruFocus' analysis, Marathon Petroleum stock appears to be overvalued.
The current stock price of €214.10 is trading 19.4% above its estimated GF Value™ of €179.29.
GuruFocus considers Marathon Petroleum to be Modestly Overvalued.
Key valuation signals for MIL:1MPC:
Volatility: 37.39%
GF Value™: €179.29 vs. price of €214.10 (19.4% above fair value)
No single metric tells the full story. See the MIL:1MPC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Marathon Petroleum is a leading integrated downstream and midstream energy company that operates 13 refineries in the Gulf Coast, Mid-Continent, and West Coast regions of the United States with an aggregate crude oil refining capacity of 3.0 million barrels per day. The company is one of the largest producers of renewable diesel in the US; its Dickinson, North Dakota facility has the capacity to produce 184 million gallons per year, and its Martinez, California, joint venture facility (a 50/50 partnership with Neste) reached its full capacity of 730 million gallons per year in late 2024. Marathon also owns the general partner and approximately 64% of MPLX LP, a large-cap master limited partnership that owns and operates midstream energy infrastructure and logistics assets.
50GF Score
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