Asian markets opened with modest losses as President Trump revived trade tensions with tariff threats targeting Greenland. This unexpected move spooked investors, pulling down regional benchmarks and dampening appetite for risk assets. The Nikkei and Hang Seng both traded lower in early session.

The renewed tariff feud echoes the 2018-2019 trade war that disrupted global supply chains and hurt corporate earnings. Investors now fear a repeat of that damaging cycle, which saw multi-billion dollar market cap losses across Asia. The focus shifts to potential retaliation from affected nations.

What to watch next: Analysts will monitor Washington's policy signals and Beijing's response. Any escalation could pressure export-heavy economies like South Korea and Taiwan. The market's next move hinges on whether this remains a rhetorical threat or translates into concrete trade barriers.