Iraq’s SOMO set the September Basrah Medium crude price for North and South America at a USD 5.10/bbl premium to Argus Sour

Official selling prices are set monthly and function as a signal of how the seller reads the balance between its barrels and competing grades, rather than as a transaction in itself. The benchmark here matters: Basrah Medium pricing to the Americas off Argus Sour places it directly against the US Gulf sour complex and, indirectly, against Mars and other medium sours competing for the same refineries, so the premium level is read as a statement about Iraqi competitiveness in that market. Historically, widening premiums to the Americas have coincided with either a tighter sour slate or confidence in refinery demand, while narrowing has tended to precede barrels being redirected toward Asia, where most Iraqi term volumes clear. The distinction worth drawing is between OSP moves that track the market and OSP moves that lead it: the former merely ratify differentials already trading, the latter shift the clearing level for spot cargoes and can compress or widen the relevant sour spreads. Worth watching are the companion OSPs for Asia and Europe in the same circular, since the relative spread between regions shows where the seller wants its marginal barrel to land. As a monthly administered price, the signal is directional and its weight lies in the month-on-month change rather than any single print.