RBOB

RBOB (Reformulated Blendstock for Oxygenate Blending) is the US benchmark gasoline commodity, traded as a futures contract on NYMEX (CME Group) and widely used as the settlement reference for US wholesale gasoline prices. The 'blendstock' specification means RBOB is assessed before the mandatory ethanol splash that produces finished US reformulated gasoline; refiners sell RBOB to blenders who ADD the oxygenate at the terminal to meet EPA reformulated-fuel requirements in major urban markets. The NYMEX RBOB front-month contract price in dollars per gallon is the primary public signal of US gasoline market tightness and is closely watched alongside WTI crude.

In the European oil market context, RBOB functions as the 'A-leg' of the transatlantic gasoline arbitrage, with EBOB (Eurobob oxy, the ARA barge benchmark) as the 'E-leg'. When RBOB is priced high relative to EBOB plus the TC2 freight cost and applicable duties, the arb is open, incentivising European gasoline exports to the US Atlantic Coast via MR tankers. In the week to 15 May 2026, RBOB reached $3.794/gal at the NYMEX following the largest US crude draw of the window (7.9mb to 445.0mb), with refinery utilisation at 91.6%, establishing short-term demand for TC2 arb flows.

RBOB pricing is also a mechanical component of NYMEX crack spreads, particularly the 3-2-1 crack (3 barrels WTI crude cracked into 2 barrels RBOB plus 1 barrel heating oil). When WTI fell sharply from its post-Hormuz highs in late May 2026 while RBOB remained supported by the US crude draw, the gasoline crack temporarily widened before normalising as demand-destruction expectations grew. The CFTC Commitments of Traders report for 19 May showed WTI net long positioning swinging sharply from net short, suggesting speculative interest had re-entered the crude market with the RBOB signal providing demand-side support.