Asia Markets Slump, Oil Soars as Iran Conflict Raises Fears Over Critical Energy Corridors

TOKYO (AP) — Financial markets across Asia-Pacific tumbled on Tuesday, mirroring global anxiety over the potential disruption to energy flows from the Middle East. The immediate trigger was a surge in oil prices, fueled by fears that the ongoing war in Iran could severely impact shipments through the Strait of Hormuz, a vital chokepoint for global crude.

Japan's Nikkei 225 led the regional sell-off, plunging 2.1% to close at 56,853.48. As a nation heavily reliant on imported energy, Japan is seen as particularly vulnerable to any blockade or instability around the Strait, through which the bulk of its oil and natural gas imports pass. "The Hormuz question is an existential one for Japan's economy," noted Kenji Tanaka, a senior analyst at Marubeni Research Institute in Tokyo. "While strategic reserves provide a buffer, the market is pricing in a new, persistent risk premium."

The losses were widespread. South Korea's Kospi, reopening after a holiday, sank 4.8% to 5,946.06. Australia's S&P/ASX 200 dropped 1.2%, while benchmarks in Hong Kong and Shanghai also edged lower.

On commodity markets, the reaction was stark. Benchmark U.S. crude rose 77 cents to $72.00 a barrel, while Brent crude, the international standard, added $1.10 to reach $78.84. This followed volatile trading on Monday, where prices spiked before paring gains, yet remained elevated. The specter of sustained supply constraints continues to loom over traders.

Sectoral moves told a clear story. Japanese energy giants Eneos Corp. and Idemitsu Kosan fell nearly 6% and 4%, respectively. Conversely, defense stocks, which had rallied recently on expectations of increased military spending, retreated as investors locked in profits. Mitsubishi Heavy Industries dropped 5%.

The contagion spread to travel. Airline stocks were hammered globally on Monday, and the pain continued in Asia. Japan Airlines fell 5.2%, Korean Air plunged 8.9%, and Qantas lost 2.9%, as investors fretted over soaring fuel costs and operational chaos from closed airspace.

Despite the turmoil, some analysts urged perspective. "History suggests markets can absorb oil shocks unless they are profound and prolonged," said Stephen Innes, Managing Partner at SPI Asset Management. "The playbook isn't new. For this to truly derail U.S. equities, we'd likely need to see oil sustainably above $100." This view was echoed in Monday's U.S. session, where the S&P 500 staged a late recovery to end slightly higher, aided by rallies in oil majors and defense contractors like Northrop Grumman.

In other markets, gold climbed 1.2% as a traditional safe haven. The yield on the 10-year U.S. Treasury note rose to 4.04%, reflecting a slight shift away from bonds. The U.S. dollar was little changed against the yen and euro.

Market Voices: A Split Reaction

David Chen, Portfolio Manager, Horizon Capital (Singapore): "This is a classic risk-off move, but it's tempered. The market is differentiating between a regional conflict and a full-blown crisis that strangles global trade. The focus is on supply chain resilience and alternative routes, which are limited in the short term."

Akari Sato, Economist, Tokyo First Bank: "For Japan, the economic calculus is suddenly grim. Every sustained $10 increase in oil prices could shave 0.2-0.3% off GDP growth. The government's talk of stockpiles is cold comfort to industries facing immediate cost pressures."

Michael Roberts, Independent Trader (Hong Kong): "It's absolute madness. Central banks are already fighting inflation, and now we're adding an oil shock into the mix? This isn't just a 'risk premium'—this is the first domino in a stagflation scenario that policymakers are utterly unprepared for. The mild rebound in the U.S. is pure complacency."

Priya Sharma, Head of Research, Emirates Financial (Dubai): "The reaction in energy markets is logical, but the equity sell-off in Asia seems overdone for now. The region's fundamentals are stronger than during past oil crises. Investors are likely to quickly pivot towards identifying winners, such as energy exporters within ASEAN and renewable energy firms."

AP Business Writer Stan Choe contributed from New York.