Marathon Petroleum is trading at $450.71, with a -4.23% change, as weakness across refiners and easing oil prices weigh on the sector.
- Diplomacy around Iran reduced some supply-risk premium; other refining shares retreated after a strong sector rally, while falling diesel futures added pressure.
- No clear new company-specific announcement explaining the move was found. The reported Galveston Bay unit upset was detected October 22 and returned to normal that day.