US President Donald Trump has announced a significant escalation in the administration's trade policy, unveiling a new round of tariffs targeting dozens of countries.

The move marks a sharp intensification of the ongoing trade conflict, moving beyond previous bilateral disputes to a broader multilateral confrontation.

Markets reacted swiftly to the news, with global equities facing renewed pressure as investors recalibrate risk models for supply-chain disruptions.

The broad scope of the tariffs introduces uncertainty for multinational corporations reliant on complex international logistics, potentially squeezing margins and delaying capital expenditure plans.

The announcement follows earlier reports that the administration was preparing to unveil such measures as early as this week.

The new tariffs are framed by the White House as necessary to protect domestic industries, but critics argue they risk triggering retaliatory measures from affected nations, further fragmenting the global trading system.