Hormuz, Trump rules out extending the agreement and a ship is hit in transit

The new development of recent hours is not the agreement on shipping routes announced by Tehran, which we reported on this morning: it is the framework surrounding it that has been overturned. On August 17 Donald Trump told reporters that Iran is unlikely to accept the agreement demanded by the United States, called for Tehran’s surrender, and ruled out extending the temporary truce that expired that same day (Bloomberg; Just Security). The memorandum of understanding signed in June between the United States and Iran to open the Strait to commercial vessels technically lapsed on Monday.

To the expiration was added a direct threat to a third country: the US president raised the prospect of an attack on Oman should Muscat hinder efforts to reopen the passage, while according to the same accounts Iran and Oman are said to be close to an agreement on managing the Strait. It is the central contradiction of the day: the negotiation that Tehran presents as a positive outcome is the same one Washington describes as an obstacle, and the two governments conducting it are, respectively, the adversary and the target of the threat.

An incident at sea, and its limits

On August 18 the UK Maritime Trade Operations received a report of a vessel hit by an unidentified projectile while transiting the Strait of Hormuz, causing damage to the engine room and injuring one crew member. What the report does not contain is as relevant as what it does: it gives no indication of where the shot came from, nor any party responsible. We record the episode for what it is — a communication from a maritime monitoring body about a single event — and do not treat it as proof of attribution by any party.

On the military supply front, a document from a European government obtained by NBC News indicates that Russia is sending drone components, munitions and explosives to Iran across the Caspian Sea. Here too the nature of the source must be stated: it is a non-public government document, reported by a single outlet, and the available material contains no independent confirmation or denial from the parties involved.

The price that measures the failure of the negotiation

Market reaction is the only quantitative indicator of the day. West Texas Intermediate rose on August 18 toward $85 a barrel, after closing Monday’s session up 2.6%; Brent ended Monday just under $91 (Bloomberg; Trading Economics). The move was linked to a solution between the United States and Iran receding further and to the refusal to extend the truce.

The physical data accompanying the price is more telling than the price itself. Over the weekend just passed, only five cargo ships crossed the Strait on Saturday, and none on Sunday: compared with 31 the previous weekend.

Five transits Saturday, zero Sunday: the previous weekend there had been 31.

The number shows that the reopening announced by the Iranian side has not yet produced measurable effects on traffic, and that the Strait’s function as a commercial corridor remains suspended regardless of statements.

There is an institutional estimate on the time horizon. In short-term forecasts published on August 11, the US Energy Information Administration puts average Brent prices at around $85 in the third quarter of 2026 and places the return of Middle Eastern production to pre-conflict levels only at the start of 2027 (EIA). It is a projection, with the margins of error inherent to any projection, but it signals that the US energy statistics agency is not factoring a rapid normalization into its accounts.

Three verifiable elements therefore remain as this edition closes: an agreement announced by Tehran alone, an agreement between Washington and Tehran that has expired and not been renewed, and maritime traffic that over the weekend fell to five ships in two days.