A Diesel Basis Spikes by 8cts on Active Trading
5/21 4:54 PM
A Diesel Basis Spikes by 8cts on Active Trading MIAMI, FL (DTN) -- Prompt Los Angeles ultra-low-sulfur diesel (ULDS) basis strengthened by 8cts on Thursday (5/21) supported by firm demand and limited supplies. The increase came as U.S. West Coast distillate supplies tightened, even as import volumes improved in the region last week, while the market also rolled into a new trading month. Sources reported trades for June ULSD in Los Angeles at 43cts premiums to June New York Mercantile Exchange RBOB futures compared with 35cts premiums traded the prior day. The hike was driven by supply tightness and Energy Information Administration data showing weekly distillate fuel oil inventories in PADD 5 fell by 200,000 bbl to 10.0 million bbl during the week ended May 15. Inventories were 300,000 bbl below the the volume reported year-over-year. ULSD imports in the region climbed by 10,000 bpd to 18,000 bpd in the same reference week, but volumes remained 29,000 bpd below the corresponding week in 2025. (c) Copyright 2026 DTN, LLC. All rights reserved.