Singapore shares dropped in the red zone on Friday, mirroring regional indices, after a US appeal court threw a curveball at investor optimism by giving Donald Trump's sweeping tariffs a momentary reprieve.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 3,894.61 and 3,917.85 throughout the day. It ended the session at 3,894.61, down 22.23 points or 0.57% compared to Thursday's close.

In economic news, total Loans and advances to residents in Singapore totaled SG$841.9 billion in April, down from SG$846.5 billion in the preceding month, according to data released by the Monetary Authority of Singapore.

Shares of Fuji Offset Plates Manufacturing (SGX:508) surged 67% at the close, as the company entering into a subscription agreement with a private investor for the subscription of 10,000,000 shares at SG$0.45 per share, or an aggregate consideration of SG$4.5 million.

King Wan's (SGX:554) shares fell over 7% as the company's attributable profit to the owners of the company slid 89% for the half year ended March 31 to SG$1.1 million from SG$9.4 million a year earlier.

Meanwhile, shares of Ley Choon (SGX:Q0X) were down over 4% at the close, as the company's attributable profit to owners jumped 30% for the half year ended March 31 to SG$7.2 million from SG$5.5 million a year earlier.