Asian Stock Markets Volatile After US Seizes Iranian Ship, Trump Issues Stern Threats
Asian-Pacific stock markets were volatile at the opening of trading today, Monday, 20 April 2026. The fluctuations follow market participants’ cautious monitoring of developments in the Middle East conflict after tensions between the United States (US) and Iran heated up again.
US President Donald Trump stated that a guided-missile destroyer from the US Navy fired upon and disabled an Iranian-flagged cargo ship in the Gulf of Oman, culminating in the seizure of the vessel. This act of seizure marks an escalation in the blockade.
The incident occurred after Iran fired upon a commercial vessel attempting to cross the Strait of Hormuz on Sunday morning. As is known, the Strait of Hormuz is a sea route connecting the Persian Gulf and the Gulf of Oman.
Since last week, the US has imposed a naval blockade on ships entering and leaving Iranian ports. Iran views this blockade as a violation of the ceasefire reached between the two countries and claims it as one reason for cancelling the scheduled negotiations on Monday, 20 April 2026, in Islamabad.
On Sunday, 19 April 2026, Trump threatened to destroy every power plant and every bridge in Iran if Tehran does not agree to Washington’s terms to end the war.
According to CNBC International, South Korea’s Kospi index rose 0.27 per cent. The Kosdaq index, comprising small-capitalisation company shares, fell 0.52 per cent.
In Japan, the Nikkei 225 index recorded a gain of 0.62 per cent. The Topix index also strengthened by 0.68 per cent.
In Australia, the S&P/ASX 200 index corrected by 0.39 per cent. Hong Kong’s Hang Seng futures traded higher at 26,502 from the previous level of 26,160.33.
Meanwhile, the two benchmark indices on Wall Street in the US hit intraday and closing highs on Friday’s trading session, 17 April 2026. The S&P 500 surged 1.2 per cent to 7,126.06, surpassing the 7,100 mark for the first time.
The Nasdaq Composite followed with a 1.52 per cent rise, closing at 24,468.48. This marks the 13th consecutive gain, the longest positive streak since 1992.