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Oil prices resume their climb and Asian markets decline as US prepares for blockade of strait

Reported by Wtop
Apr 13, 2026· 3 min read
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Key Takeaways
  • • Crude oil surged 8.7% to $104.95/barrel (U.S. benchmark) and Brent crude rose 7.4% to $102.23/barrel on Monday following President Trump's announcement of a U.S. military blockade of Iranian ports, with Brent having climbed from ~$70/barrel in late February to above $119 at peak levels.
  • • U.S.-Iran ceasefire talks in Pakistan concluded without agreement, prompting Trump to authorize the blockade effective Monday at 10 a.m. EDT (5:30 p.m. Iran time), targeting all Iranian ports amid shipping stalls through the Strait of Hormuz since late February.
  • • Asian equity markets declined broadly on geopolitical risk and oil price volatility: Japan's Nikkei 225 fell 1.0% to 56,357.40; Hong Kong's Hang Seng dropped 1.5% to 25,513.42; South Korea's Kospi declined 1.1% to 5,795.15; Australia's S&P/ASX 200 shed 0.5% to 8,913.50.
  • • Global trading expected to remain turbulent, with Astris Advisory Japan's Neil Newman noting failed diplomatic outcomes and oil price concerns will sustain market volatility; U.S. markets ended last week with modest gains despite choppy trading, with optimism over weekend peace talks subsequently erased.
  • • Supply disruption risk intensifies: The Strait of Hormuz, through which nearly 20% of global oil supply flows, has experienced shipping stalls since late February, with the blockade announcement cementing supply-side constraints and upside pressure on energy prices.
Summary
Oil prices accelerated sharply on Monday as the U.S. military prepared to enforce a comprehensive blockade of Iranian ports, following the collapse of ceasefire negotiations in Pakistan. Benchmark U.S. crude surged $8.38 per barrel, or 8.7%, to close at $104.95, while Brent crude, the international standard, gained $7.00, or 7.4%, to $102.23. This latest move represents a continuation of the upward trajectory that began in late February; Brent crude has climbed from approximately $70 per barrel before the conflict to peaks exceeding $119 as shipping through the Strait of Hormuz—a critical chokepoint handling roughly 20% of global oil supply—has been essentially stalled since the outbreak of hostilities.

President Trump announced the blockade after U.S.-Iran negotiations in Pakistan ended without resolution, with the U.S. military formally initiating operations against all Iranian ports at 10 a.m. EDT (5:30 p.m. Iran time) on Monday. The failure to achieve a ceasefire agreement reversed market sentiment that had briefly buoyed equities over the weekend on hopes for a diplomatic resolution.

Asian markets broadly declined in response to the geopolitical escalation and elevated energy costs. Japan's Nikkei 225 index fell 1.0% to 56,357.40, while Hong Kong's Hang Seng slipped 1.5% to 25,513.42. South Korea's Kospi dipped 1.1% to 5,795.15, and Australia's S&P/ASX 200 shed 0.5% to 8,913.50. The Shanghai Composite was relatively resilient, falling just 0.2% to 3,976.57. U.S. markets, which had posted a second consecutive weekly gain through Friday despite choppy trading—with the S&P 500 essentially flat, the Dow down 0.6%, and the Nasdaq up 0.4%—are expected to face continued pressure from elevated oil prices and geopolitical uncertainty.

Market strategists have flagged sustained volatility ahead. Neil Newman, Managing Director and Head of Strategy at Astris Advisory Japan, observed that "the outcome of the talks was not really what people were hoping for" and emphasized that "oil prices are a big concern" as conditions deteriorate. With the blockade now operational and shipping disruptions likely to persist, energy inflation poses a material headwind to risk appetite and corporate earnings across Asia-Pacific and global markets more broadly.

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Sources

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AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Wtop Oil prices resume their climb and Asian markets decline as US prepares for blockade of strait