New Controls at the Strait of Hormuz

The IRGC Navy's latest orders mark a significant moment for energy security in the Middle East. Although Iran had previously signaled an intention to reopen the Strait of Hormuz, it has now imposed strict new navigation rules. Combined with the ongoing US blockade of Iranian ports, this signals a complex geopolitical situation. These actions directly affect global energy supplies, requiring a new look at market stability and the potential for wide-ranging economic impacts.

New Controls Tighten on Key Oil Chokepoint

Iran's Islamic Revolutionary Guard Corps (IRGC) Navy has again imposed strict controls on the Strait of Hormuz, a key route for about 20% of the world's oil supply. The new rules ban military vessels and require civilian ships to follow Iranian-set routes, needing prior approval. This follows President Donald Trump's statement that the US would continue its naval blockade of Iranian ports until a full agreement is reached. The market reacted immediately, causing oil prices to swing sharply. Brent crude futures have seen intense fluctuations, with reports of prices surging past $100 per barrel to a high of $126 in March 2026 – the largest monthly increase ever recorded. This volatility shows how sensitive the market is to any perceived threat to global energy transport, especially given limited spare production capacity and the oil market's already delicate balance.

Wider Supply Chain Impacts

Impacts from disruptions at the Strait of Hormuz reach far beyond just crude oil prices, affecting many global supply chains. The Middle East is a major supplier of petrochemicals, fertilizers, and industrial metals like aluminum. Shipping restrictions have caused shortages and delays for these vital goods, raising costs for industries from agriculture to manufacturing. Disruptions to fertilizer supplies, especially, threaten crop yields and could worsen global food price inflation, a serious issue for countries that import food. Economists warn that these indirect effects might last longer than initial oil price jumps, potentially fueling ongoing inflation and slowing down global economic growth. The International Monetary Fund estimates that a 10% rise in oil prices can increase global inflation by 0.4 percentage points and reduce output by 0.1% to 0.2%.

Higher Oil Prices May Become the Norm

Tensions in the Persian Gulf have typically added a "geopolitical risk premium" to oil prices, reflecting worries about supply disruptions. The International Energy Agency has called the current crisis the "largest supply disruption in history," even greater than the 1970s energy crisis. Some analysts believe current pricing reflects strong market fundamentals. However, others argue that the risk factor has become a more permanent feature rather than a temporary one. Ongoing conflict and damaged energy infrastructure mean supply is recovering more slowly than expected, even with temporary Strait openings. Coupled with ongoing sanctions and unresolved nuclear program issues, oil prices are likely to stay higher for longer.

Persistent Risks Remain Despite 'Open' Strait

Although recent announcements state the Strait of Hormuz is "completely open" for commercial vessels, significant geopolitical risks continue to threaten market stability. The current situation is temporary, with ongoing disputes over Iran's nuclear program and the lifting of US sanctions creating an unstable environment prone to renewed disruptions. The US naval blockade on Iranian ports remains, maintaining economic pressure and the possibility of direct confrontation should ships challenge it. Moreover, extensive damage to regional energy infrastructure requires lengthy repairs, meaning a full return to previous supply levels could take months or years. The IRGC's claim that control has returned to its "previous state" under strict military management, along with warnings of continued blockades if the US blockade persists, shows there has been no clear de-escalation. The market may be overlooking the substantial rebuilding efforts and the serious risks of renewed conflict, which could drive oil prices to $110-$150 per barrel or more if disruptions worsen. The changing nature of energy supply chains, due to increased geopolitical risk and a reevaluation of global trade reliability, suggests price volatility will continue.

Outlook for Energy Markets

Achieving lasting stability in energy markets remains uncertain. The temporary reopening of the Strait of Hormuz has provided immediate relief and caused oil prices to drop sharply, but geopolitical tensions are far from over. The possibility of renewed conflict, along with slow infrastructure repairs and the continuing US blockade, suggests that oil prices could enter a sustained higher period. This situation is likely to continue fueling global inflation, making monetary policy decisions harder for central banks, and pushing countries to speed up their efforts to secure energy through diversification and renewable energy investments. Markets will closely watch developments concerning Iran's nuclear program, sanctions, and the wider US-Iran relationship, as any of these could lead to further price shocks.