Asian Stock Markets Open Nervously Amid Escalating Iran-US Tensions
Asian-Pacific stock markets moved variably on Monday’s trading (20/4/2026) amid investors’ cautious outlook as they monitored developments in the Middle East conflict. Tensions have once again escalated between Iran and the United States following the latest military incident in the region.
According to CNBC, US President Donald Trump stated on Sunday that a guided-missile destroyer from the US Navy had fired upon and disabled an Iranian-flagged cargo ship in the Gulf of Oman. Subsequently, Marines reportedly boarded and seized the vessel.
This seizure marks an escalation from the ongoing blockade, following Iran’s actions in firing upon commercial ships transiting the Strait of Hormuz. This strategic waterway connects the Persian Gulf to the Gulf of Oman and serves as a vital route for global energy trade.
Since last week, the US has been enforcing a naval blockade on ships entering and exiting Iranian ports. Tehran views this move as a violation of the ceasefire and has cited it as the reason for cancelling scheduled negotiations in Islamabad.
Trump also warned of destroying Iran’s key infrastructure if it does not accept Washington’s terms to end the conflict. This strong statement has further heightened market concerns over the potential for a broader open conflict.
In the commodities market, oil prices surged sharply amid rising geopolitical risks in a major energy-producing region. West Texas Intermediate rose 8.11% to US$90.65 per barrel, while Brent strengthened 7.21% to US$96.90 per barrel.
Among regional stock markets, South Korea’s Kospi index rose 0.27%, while the Kosdaq fell 0.52%. In Japan, the Nikkei 225 gained 0.62% and the Topix rose 0.68%, whereas Australia’s S&P/ASX 200 weakened 0.39%.
Hong Kong’s Hang Seng index futures were at 26,502, higher than the previous close of 26,160.33. This movement reflects limited optimism amid global uncertainty.
On Wall Street, Dow Jones Industrial Average futures fell 425 points or 0.9%. Meanwhile, S&P 500 futures weakened 0.8% and Nasdaq-100 futures dropped 0.65%.
In Friday’s regular trading, the S&P 500 surged 1.2% to 7,126.06, breaking the 7,100 level for the first time. The Nasdaq Composite rose 1.52% to 24,468.48, marking a 13-day winning streak, the longest since 1992.