Singapore shares ended in the red zone on Thursdaay once more, as investors weighed a volatile geopolitical landscape against a backdrop of shrinking foreign exchange reserves across Asian markets.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 4,980.53 and 5,015.09 throughout the day. It ended the session at 4,995.94, down 8.02 points or 0.2% compared to Wednesday's close.

On the corporate front, shares of AEM (SGX:AWX) surged nearly 19% at the close as the semiconductor solutions provider reported a 329% increase in its net profit during the first quarter of the year to SG$14.3 million from SG$3.3 million a year earlier.

Singapore Post's (SGX:S08) shares closed over 5% lower, as its attributable profit to equity holders fell 82% in the fiscal second half ended March 31 to SG$41.2 million from SG$222.5 million a year earlier.

Meanwhile, shares of Wee Hur (SGX:E3B) were down over 1% even as the company's private residential development in Singapore, Bartley Vue, secured a temporary occupation permit.

STI down 0.2%; Nio up 5%; Singtel up 1%; SingPost down 5%; Genting Sing down 3%; SIA Engineering, UOL, Keppel down 2%.