Breakthrough economist explains why diesel prices climb faster than they fall; Treasury sanctions cartel fuel-smuggling ring
Diesel prices go up fast and come back down slow, and Breakthrough Chief Economist Matthew Muenster laid out the mechanics this week in a FreightWaves piece. For any carrier running a fuel surcharge off a weekly index, that lag is real money, and it almost always cuts against the hauler.
Why the lag
The rise-fast, fall-slow pattern comes out of how the fuel supply chain actually prices. When crude jumps, retailers and wholesalers reprice up quickly because their next load will cost more, and a seller has little reason to price tomorrow's gallons at yesterday's number. On the way down it goes slower. A station that bought a tank at the high price holds its street price until it sells through that inventory, and competitors watch each other before anyone cuts. Global events set the ceiling; inventory strategy and competitor pricing set how long you wait for relief.
Muenster's argument for shippers is that the lag is predictable if you watch the data, so a fleet can time surcharge resets and lane bids around it instead of eating the gap. For a hauler paying at the pump while billing a customer off a lagging index, the days between a crude drop and a retail drop are days you carry the cost yourself.
The cartel sanctions
Treasury sanctioned two Mexican nationals and nine companies Tuesday for helping the Jalisco New Generation Cartel run a cross-border fuel-smuggling operation that OFAC and FinCEN describe as multimillion-dollar. "Today's action highlights the extent to which Mexico's cartels are expanding beyond traditional drug trafficking to generate revenue for their criminal organizations," Treasury Secretary Scott Bessent said.
This one matters to legitimate operators. Smuggled and stolen fuel crossing the border came in without paying the taxes and duties honest product pays, and it undercuts jobbers who play it straight. When Treasury names companies and freezes their access to the US financial system, it raises the cost of moving that fuel and, at the margin, protects the price honest suppliers can charge. Whether these designations slow the flow or just push it to new shell companies is the open question, since cartel fuel theft has been growing on the Mexican side for years.
What to watch
Watch whether the OFAC and FinCEN action actually dents cross-border volumes or just reshuffles the paperwork. Watch crude next, because the same rocket-and-feather lag Muenster described means any relief at the rack could take a week or more to reach carrier surcharges. Foreign retail moves, like the Indian OMC price question, don't touch what US haulers pay and aren't worth chasing.