Crack Spread Triples, Refiners Surge 80% Despite Falling Crude

Refining stocks have rallied more than 80% this year, driven by a surge in the 3-2-1 crack spread that nearly tripled since January, according to Bloomberg data. Marathon Petroleum, Valero, HF Sinclair, and Phillips 66 all posted gains that far outpaced the S&P 500's 11% advance.

The WTI 3-2-1 crack spread hit $59 a barrel. That is roughly triple the level at the start of 2026. The metric estimates the gross margin a refinery earns by turning three barrels of crude into two barrels of gasoline and one barrel of distillate fuel. When that spread widens, refiners make more money on each barrel they process.

What makes this move unusual is that crude oil prices have not been rising in tandem. In fact, crude pulled back after a truce between the U.S. and Iran was signed, a deal President Trump later declared "over." But gasoline and diesel prices stayed elevated because of a global refining shortage, the Iran conflict, Ukrainian attacks on Russian refineries, and lower fuel exports. That combination created an unusually profitable environment for refiners.

Each company brings its own strengths. Marathon Petroleum generates substantial cash flow from its large refining network and its MPLX midstream partnership. Valero is one of North America's lowest-cost operators. Phillips 66 adds chemicals and midstream exposure. What they share is the same tailwind: wide crack spreads.

AlphaScala's proprietary scoring reflects the current dynamics. MPC holds a Moderate 66 out of 100. PSX scores a Moderate 65. Both sit in the same risk category, suggesting the elevated margins are priced in but the risk of mean reversion is real.

Crack spreads rarely stay at these levels indefinitely. History shows margins tend to normalize as fuel supplies increase, refinery utilization rises, or crude rebounds faster than refined products. Reuters has noted that today's extraordinary profitability could prove temporary as crude markets rebalance following supply disruptions.

For investors watching the sector, the daily crude price is less important than the crack spread. As long as that margin remains well above historical norms, the major refiners should continue generating robust cash flow. The WTI 3-2-1 spread was at $59 a barrel as of Friday, according to Bloomberg. Whether that holds depends on global refining capacity additions and fuel demand.