Oil prices tumble 10% as Iran declares Strait of Hormuz open

Oil markets reacted sharply after Iranian Foreign Minister Abbas Araghchi posted that the Strait of Hormuz is “declared completely open” for commercial vessels for the remaining period of the ceasefire, triggering an immediate roughly 10% drop in Brent prices to around $89 a barrel.

Traders cited the announcement as a primary driver of the sell-off, pricing in the potential for previously trapped barrels in the Persian Gulf to reach global markets. U.S. crude (WTI) followed with similar declines as risk premia tied to potential chokepoint closures eased. Market participants cautioned, however, that operational constraints — including insurance availability and vessel routing — must normalize before flows return to pre-crisis levels.

The price retreat buoyed broader equity markets and reduced near-term inflation worries in commodity-sensitive regions. European and Asian stock indices climbed amid the relief rally, while currencies of major oil-importing countries gained modestly. Nevertheless, analysts pointed out that shipping volumes through the strait remain below normal and uncertainty around enforcement and naval postures persists.

In context, the Strait of Hormuz has been a focal point since the outbreak of hostilities earlier this year, responsible for a significant share of seaborne oil and LNG flows. Previous attacks and export disruptions had pushed Brent sharply higher; the latest announcement represents a potential de-escalation but not yet a definitive resumption of stable trade. The situation keeps energy security and strategic stock release options on policymakers' agendas.

Looking ahead, analysts expect volatility to continue until independent confirmations of sustained tanker transits, insurance coverage resumption and diplomatic signals reduce tail-risk. Short-term price moves will hinge on operational data from ship trackers, OPEC+ responses and any subsequent statements from U.S. and regional authorities regarding naval or blockade measures. Market participants say they will monitor these indicators closely before increasing long positions.