Forget Oil Prices -- This 1 Refining Number Explains Why These Energy Stocks Are On Fire

Energy stocks are highlighted as outperformers in 2026, with oil refiners posting some of the biggest gains as a key refining profitability metric expands. The article says Marathon Petroleum (MPC), Valero (VLO), and HF Sinclair (DINO) have each risen more than 80% year-to-date, while Phillips 66 (PSX) is up more than 54%. It attributes the rally not primarily to higher crude prices, but to the 3-2-1 crack spread, described as the gross margin from turning three barrels of crude into two barrels of gasoline and one of distillate fuel such as diesel or jet fuel. Using Bloomberg data, it states the U.S. WTI 3-2-1 crack spread recently reached $59 per barrel and that refining margins have nearly tripled since the start of 2026. The article links the unusual margin expansion to elevated gasoline and diesel prices despite crude pullbacks after a U.S.-Iran truce, citing global refining capacity shortages and disruptions including attacks on Russian refineries and reduced fuel exports. It also notes investor interest in companies’ networks and cost positions, mentioning MPLX as part of Marathon’s structure and describing Valero as a low-cost operator.