CL Climbs 6% as Iranian Gunboats Fire on Tanker, Hormuz Restrictions Restored

The Reversal

Iran's parliament National Security Commission, led by Ebrahim Azizi, announced the strait is 'returning to the status quo' — meaning ships need Iranian naval authorization and must pay tolls before transit. Within hours, Iranian gunboats opened fire on a commercial tanker attempting passage, per the British military's UKMTO advisory. That is a hard repudiation of Foreign Minister Abbas Araghchi's Friday declaration that the strait was 'completely open' for the duration of the Lebanon ceasefire. Tehran is framing the reversal as a response to Washington refusing to lift the CENTCOM naval blockade on Iranian ports, which Trump confirmed would remain in place until negotiations conclude.

Friday's Flush, Now Reclaimed

Araghchi's reopening line nuked the Iran risk premium in a single session — WTI fell 11.45% to $83.85 and Brent dropped 9.07% to $90.38 — the sharpest single-day drop since the war started. The tape was effectively pricing the ceasefire as a structural de-escalation. CL is now back to $86.40, having retraced most of that flush in 24 hours. Goldman had pegged the Iran-driven risk premium at $14–18 per barrel since hostilities began in early March; that premium is being put back on the bid as Tehran demonstrates it can throttle Hormuz at will, regardless of what its own foreign ministry says publicly.

Tuesday's Deadline

The two-week U.S.-Iran ceasefire mediated by Pakistan expires April 21. Trump said over the weekend that talks are 'looking very good,' but Tehran's actions on the water — restoring the toll regime, firing on a tanker, asserting parliamentary control over the strait — are not the actions of a regime preparing to extend a truce. The setup into Tuesday is asymmetric: a confirmed extension drains premium fast, but any breakdown puts Friday's $113 print back in play. With Gulf flows still running at a fraction of normal and CENTCOM continuing to turn back Iran-bound ships, the market is pricing optionality on a binary deadline three sessions out.

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