Over the weekend, U.S. President Donald Trump announced an immediate blockade of the Strait of Hormuz by the U.S. Navy, following the collapse of high-level negotiations between the U.S. and Iran in Pakistan, which failed to produce an agreement to end the ongoing Middle East conflict [1][2][3][4]. Trump stated on his social media platform that 'the United States Navy, the Finest in the World, will begin the process of BLOCKADING any and all Ships trying to enter, or leave, the Strait of Hormuz,' with the blockade set to begin at 10:00 a.m. ET on Monday [3][4]. He further asserted that other countries would be involved in the blockade and that Iran would not be allowed to profit from what he called an 'Illegal Act of EXTORTION' [4].
The announcement triggered a sharp reaction across global markets. Brent crude oil surged 6.8% to $101.68 per barrel, with U.S. West Texas Intermediate rising 7.2% to $103.59 [4]. MUFG reported Brent spiking as much as 9% to $103 per barrel, attributing the move to heightened supply disruption risks and ongoing uncertainty over tanker flows through the Strait [2]. Despite a clarification from U.S. Central Command about a narrower enforcement scope, the lack of clarity on how the blockade would be implemented kept upside risks for oil prices elevated [2]. Notably, three oil supertankers carrying around 6 million barrels managed to cross the Strait over the weekend, representing the largest non-Iranian tanker flow since the conflict began [2].
The surge in oil prices and renewed geopolitical tensions weighed heavily on risk assets. European stocks opened the week lower, with the Stoxx 600 down 0.7% and travel and leisure stocks plunging 2.1% amid concerns over jet fuel supply disruptions. Airlines such as Wizz Air, EasyJet, and Lufthansa fell 6.9%, 3.8%, and 3.9%, respectively, while energy stocks like Vår Energi gained 3.9% [4]. Asian currencies weakened, and the U.S. dollar strengthened [2][4]. Treasury yields also rose, with the 10-year note up more than 1 basis point to 4.333%, the 2-year up over 2 basis points to 3.8242%, and the 30-year up less than 1 basis point to 4.923% [3].
The macroeconomic outlook darkened as stagflation risks came to the fore. DBS Group Research expects the IMF’s World Economic Outlook, due April 14, to downgrade global growth and highlight Asia’s vulnerability due to its dependence on Hormuz-linked industrial inputs [1]. IMF Managing Director Kristalina Georgieva warned that it would take time for global prices to return to pre-conflict levels, with the latest U.S. CPI reading already at a two-year high, stoking fears that the energy price shock could spill over into broader inflation [1][3]. Analysts noted that President Trump is likely to be sensitive to the inflation swing, with further spikes possible if peace talks fail [3].
In addition to the blockade, Trump threatened China with 'staggering tariffs' of around 50% if Beijing provides military assistance to Iran, potentially escalating tensions further [4]. European investors also monitored political developments in Hungary, where the forint rallied after a pro-EU opposition victory [4].
CONCLUSION
President Trump's decision to blockade the Strait of Hormuz after failed Iran talks has sent shockwaves through global markets, driving oil above $100 and sparking fears of stagflation and supply disruptions. Risk assets sold off, energy stocks rallied, and inflation concerns intensified, with analysts and policymakers warning of further volatility if the conflict escalates or negotiations remain stalled.