Singapore, Feb. 24 -- A series of recent tariff announcements by the US administration has created fresh uncertainty for businesses in Singapore, raising concerns over higher export costs and a more volatile trading environment.

On February 20, the Supreme Court of the US struck down so-called reciprocal tariffs imposed under the International Emergency Economic Powers Act (IEEPA), ruling that US President Donald Trump had exceeded his constitutional authority. Shortly after, the White House issued an order to impose a 10% global tariff under Section 122 of the Trade Act. A day later, Trump announced that the rate would be raised to 15% on all goods entering the US.

Singapore is among a handful of countries around the world and the only...