EIA: Crude stocks post bigger-than-expected build as refinery runs retreat

US commercial crude inventories rose 922,000 barrels to 427.3 million barrels in the week ended September 25, the EIA said, roughly triple the 264,000 barrel draw analysts had expected in a Reuters poll, the second straight week the data has wrong-footed consensus in the same direction.

Crude imports fell 179,000 barrels a day to 5.7 million, while exports rose to 3.57 million barrels a day from 3.28 million, up roughly 290,000 barrels a day on the week. Net imports still fell 468,000 barrels a day, meaning the export gain outweighed the import decline and tightened the net balance, yet crude stocks built anyway, pointing to refinery demand as the real swing factor behind the headline number. Domestic production ticked up 17,000 barrels a day, a marginal gain that did little to shift the picture.

Refinery crude runs fell 554,000 barrels a day, and utilization dropped 1.5 percentage points to 92.5%, the clearest driver of the build: with less crude being pulled into processing, barrels accumulated even as the trade side of the ledger tightened. That combination, weaker net imports but softer refinery demand, shows the crude balance is now being shaped more by what refiners are doing than by what's crossing the border.

Motor gasoline inventories fell 1.7 million barrels, pushing stocks to 7% below the five-year average, a deepening deficit that stands in contrast to the crude side and suggests gasoline demand is still outrunning supply even as refiners pull back.

The split here is the story: refiners easing off the throttle built crude stocks despite a tighter net import position, and if runs stay lower heading into fall turnaround season, that trade-side tightening may start showing up in inventories again once refinery demand catches back up.

Written by: Farid Muzaffar