Diesel Market Stays Tight Even as Oil Slips on New Iran Sanctions

Oil prices fell about 1% ahead of a US announcement to impose further sanctions on Iran, a move traders read as adding supply risk to an already tight market. The drop suggests investors were positioning ahead of the sanctions news rather than reacting to a supply shock that had already landed. The more important story sits underneath that headline move. Separate reporting argues the diesel crisis squeezing global fuel markets predates the Middle East conflict and will outlast it, tied to years of underinvestment in refining capacity rather than the war alone. That distinction matters for how long refiners like Ampol can expect elevated margins to persist. What remains unclear is the scale of the new sanctions package and whether it targets Iranian crude exports directly, which would tighten supply further, or financial channels, which would have a more muted effect on physical oil flows.