Refiners Marathon Petroleum and Valero Energy jump as fuel margins widen, while Exxon Mobil remains flat.

Marathon Petroleum and Valero Energy shares rose 5% and 4% respectively, driven by expanding refining margins as fuel prices pull away from crude costs. In contrast, Exxon Mobil's stock stayed nearly flat due to its integrated model balancing crude production gains against refining costs. This divergence highlights how pure refiners benefit directly from wider fuel margins, while integrated majors have a cushioning effect. Investors should watch if this trend continues, as refiners lack upstream production to offset margin squeezes if crude prices rise faster than fuel prices.

Marathon Petroleum and Valero Energy both have market caps just above $111 billion on Pluang as of Oct 02, 2026 01:02 WIB, with Marathon showing a 1-day price gain of 5.26% and Valero 4.52%. Marathon's dividend yield is 1.01%, while Valero offers 1.24%, reflecting their focus on refining amid current fuel margin trends. Exxon Mobil, much larger with a $669.21 billion market cap and a 2.53% dividend yield, trades nearly flat with only a 0.53% increase, showing its integrated model's different market response.