Why Marathon Petroleum Stock Slipped Today

Key Points At this point, it's mulling over different options and might not opt for a full ban. Marathon is a major producer of diesel in this country. 10 stocks we like better than Marathon Petroleum › The latest White House proposal to rein in diesel prices and an analyst's recommendation downgrade were the major factors behind Marathon Petroleum 's (NYSE: MPC) stock price dip on Tuesday. At the close of that day's trading session, the company's equity was down more than 3%. Potential export ban Treasury Secretary Scott Bessent said that the Trump administration is mulling a ban on U.S. diesel exports. He added that this would reduce prices for the fuel, commonly used for cargo trucks, which continue to reach all-time high prices. Almost needless to say, many analysts and economists attribute this rise mainly to the impact of the Iran war. Missed AI’s "Act 1"? Act 2 Could Be 15x Bigger. Most investors think they missed the AI boat because they didn't buy Nvidia in 2005. But according to our analysts, we’re only at the end of "Act 1"—the R&D phase. "Act 2" is the global rollout. Continue » Image source: Getty Images. Bessent implied this was only a proposal at this stage. He said the Trump team is "examining whether it's feasible in terms of the overall refining capacity and whether a full or partial ban would work." Compounding that, well before market open, Jefferies ' Lloyd Byrne downgraded his rating on Marathon to hold from buy, with a price target of $413 per share. According to reports, the analyst wrote that the current price and valuation are consistent with historical levels, while threats loom on the horizon -- such as a consumer pull-back due to those rising diesel prices. Distillates for domestics only? Marathon is a prominent American oil refiner and is highly active in the distillates segment, which includes diesel and jet fuel. What's more, those goods make up the bulk of the company's exports from its Gulf Coast refineries. So even a partial and/or temporary ban would negatively affect its operations. Given that, I think Byrne's move is the right one; personally, I'd hold this stock at best, and not be a buyer now. Should you buy stock in Marathon Petroleum right now? Before you buy stock in Marathon Petroleum, consider this: The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and Marathon Petroleum wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years. Consider when Netflix made this list on December 17, 2004... if you invested $1,000 at the time of our recommendation, you’d have $395,625 !* Or when Nvidia made this list on April 15, 2005... if you invested $1,000 at the time of our recommendation, you’d have $1,397,147 !* Now, it’s worth noting Stock Advisor’s total average return is 951 % — a market-crushing outperformance compared to 214% for the S&P 500. Don't miss the latest top 10 list, available with Stock Advisor , and join an investing community built by individual investors for individual investors. See the 10 stocks » *Stock Advisor returns as of September 22, 2026. Eric Volkman has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Jefferies Financial Group. The Motley Fool has a disclosure policy .

At this point, it's mulling over different options and might not opt for a full ban.

The latest White House proposal to rein in diesel prices and an analyst's recommendation downgrade were the major factors behind Marathon Petroleum 's (NYSE: MPC) stock price dip on Tuesday. At the close of that day's trading session, the company's equity was down more than 3%.

Treasury Secretary Scott Bessent said that the Trump administration is mulling a ban on U.S. diesel exports. He added that this would reduce prices for the fuel, commonly used for cargo trucks, which continue to reach all-time high prices. Almost needless to say, many analysts and economists attribute this rise mainly to the impact of the Iran war.

Missed AI’s "Act 1"? Act 2 Could Be 15x Bigger. Most investors think they missed the AI boat because they didn't buy Nvidia in 2005. But according to our analysts, we’re only at the end of "Act 1"—the R&D phase. "Act 2" is the global rollout. Continue »

Bessent implied this was only a proposal at this stage. He said the Trump team is "examining whether it's feasible in terms of the overall refining capacity and whether a full or partial ban would work."

Compounding that, well before market open, Jefferies ' Lloyd Byrne downgraded his rating on Marathon to hold from buy, with a price target of $413 per share. According to reports, the analyst wrote that the current price and valuation are consistent with historical levels, while threats loom on the horizon -- such as a consumer pull-back due to those rising diesel prices.

Marathon is a prominent American oil refiner and is highly active in the distillates segment, which includes diesel and jet fuel. What's more, those goods make up the bulk of the company's exports from its Gulf Coast refineries. So even a partial and/or temporary ban would negatively affect its operations.