Chicago CBOB-ULSD Spread Narrows Ahead of Winter
12/12 4:40 PM
Chicago CBOB-ULSD Spread Narrows Ahead of Winter Miguel E. Andujar DTN Refined Fuels Market Reporter DAVENPORT, FL (DTN) -- Limited diesel supplies and low seasonal demand for gasoline continued narrowing the spread between both products in the Chicago spot market on Friday (12/12). The Chicago CBOB-ULSD spread narrowed to 36.61cts on Friday, below the 45.88cts mark recorded the same day last week, and it was narrower than 62.87cts reported month-over-month, according to DTN data. However, the spread between Chicago CBOB and ULSD remains wider than both the year-to-date average of 23.90cts and the the 17.27cts average during the same period of last year, indicating ULSD continues to trade at a relatively deep discount to gasoline. Still, the move highlights a clear shift in relative value as the Midwest market transitions into winter demand. Chicago ULSD spot prices have outperformed CBOB prices since late November following a disappointing summer driving season for gasoline. The spread has been supported by firmer diesel fundamentals. Midwest (PADD 2) ultra-low sulfur diesel inventories amounted 1.4 million bbl in the week ended December 5, below the same time last year, tightening supply coverage as colder weather approaches, according to the most recent U.S. Energy Information Administration data. Average U.S. diesel retail prices were at $3.635 gallon last week, 23cts up year-over-year, the same EIA data showed. A source familiar with Midwest refined-products markets said, "Based on the fundamentals, you could argue ULSD still looks undervalued relative to CBOB, especially with a tighter distillate market as the region moves deeper into winter." (c) Copyright 2025 DTN, LLC. All rights reserved.