Price Swings in ULSD, RBOB Futures to Squeeze Margins
3/23 4:28 PM
Price Swings in ULSD, RBOB Futures to Squeeze Margins Barani Krishnan DTN Refined Fuels Market Reporter SECAUCUS, NJ (DTN) -- U.S. refining margins are likely to be squeezed if extreme volatility in NYMEX ULSD and RBOB futures becomes normalized with minute-by-minute turns in the Iran war. Sharp double-digit declines in refined product futures, such as those seen on Monday (3/23), could particularly put refiners in the West Coast, or PADD 5, under pressure as the cost of heavy crude remains buoyed by the ongoing supply blockade caused by the war. ULSD futures for April delivery finished down Monday's trade down $0.5524 at $4.0560 gallon, after a session low of $4.0049 and high of $4.8353. The NYMEX RBOB gasoline contract for April closed down $0.3113 at $2.9749 gallon. The intraday low was $2.8972 versus high of $3.4079. Crude prices also tumbled after swinging on the day. NYMEX WTI for April settled at $88.13 bbl, down about $10, after an intraday swing of $17. Brent, which decides pricing for imported crude, fell more than $12 on the day, after a swing of over $18, to $99.94. While the outsized drop in crude futures should theoretically balance out Monday's 55cts drop in ULSD and 31cts slide in gasoline, real market conditions can exacerbate refiners' dilemma, owing to timing lags and grade differentials. This is because refiners are now processing crude purchased weeks ago when Brent was steady at around $100/bbl. When refined product futures -- ULSD or RBOB -- tumble intensely following turn-by-turn developments on the Iran war, the refiner sells finished fuel at prompt lower prices while paying off expensive inventory currently in their system. This creates an immediate cash-flow squeeze that a one-day drop in crude futures cannot fix. While WTI fell to around $88 bbl on Monday, the heavy grades required by PADD 5 refiners remain relatively sticky or expensive because of the Strait of Hormuz blockade by Iran that has physically cut off the global supply of heavy oil. Case in point is Brent, which fell $12 on the day but remained close to $100 bbl. Brent is one of the international indicators for heavy crude like the Saudi Medium or Saudi Light that West Coast refiners rely on. Unlike refiners on the Gulf Coast, or PADD 3, which are supplied by an extensive network of domestic pipelines from the Permian and Bakken, the West Coast has no such infrastructure crossing the Rockies. If PADD 5 loses seaborne imports from the Middle East, it cannot simply turn a valve to bring in more Texas crude. While the U.S. is a net exporter of oil, California itself remains a massive net importer. Persian Gulf imports concentrate largely in PADD 5 because California refiners lack the pipeline connectivity of the PADD 3. Daily price swings from the Iran war will disproportionately impact refiners in the West Coast more than any other U.S. region. (c) Copyright 2026 DTN, LLC. All rights reserved.
 
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