Diesel opened 2026 at a 14-month low. By March it had rewritten the math on every load in America. Five months in, carriers still running on static surcharges are carrying costs they were never meant to carry.
Diesel closed 2025 on a downward drift. The week of January 12 hit $3.46 - the lowest reading in over a year. Heading into February, the market looked range-bound. Carriers' budgeting for the year had reasonable data to work from. That window closed fast.
The week of March 9 added $0.96 at the pump in a single week, from $3.90 to $4.86. It was the largest single-week move in the dataset. By April 6, the national average retail diesel had reached $5.643. The surcharge infrastructure most carriers rely on, monthly resets and static bands, was not built for a move of that speed or magnitude. Every load priced before March 9 and delivered after it became a margin event, the carrier couldn't see coming and couldn't price away.
April looked like a peak. Prices pulled back from $5.643 to $5.351 by April 27. That retreat invited the assumption that the worst was over. It wasn't. The week of May 4 saw prices re-spike to $5.640 - nearly identical to the April high and hold above $5.59 through mid-May. The market didn't normalize. It reset. Carriers who waited out April, expecting relief, absorbed another month of elevated cost on the same broken surcharge assumptions.
Ten consecutive weeks above $5.00 is not a spike. It's a new operating environment. The carriers who have managed through it are not the ones who got lucky on timing - they're the ones who knew what they were owed on every load, in real time, and didn't wait for a monthly statement to find out the gap had opened again.
Magnus interrogates any published index, ingests it on the cadence it publishes, and rewrites every load to that index automatically.
Every surcharge ties to the moment that matters: tender accept, pickup, or delivery. Every load is independently verifiable in real time, so carriers stop carrying costs the surcharge was supposed to absorb.
