Singapore stocks remained marginally lower on Wednesday, tracking mixed regional results following the US mid-terms, with a potential Democratic-led Congress sparking fears of tighter regulatory scrutiny and political blocks on data-center construction.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 5,192.31 and 5,276.09 throughout the day. It ended the session at 5,268.63, down 0.66 points or 0.01% compared to Tuesday's close.

AEM SGD up 7%; UMS up over 6%; Top Glove, Seatrium up around 5%; YZJ Maritime, Sheng Siong, iFast up over 2%.

On the corporate front, shares of Acrophyte Hospitality Trust closed nearly 5% higher as the trust posted net property income of $11.6 million for the third quarter, compared with $11.1 million a year ago.

The Hour Glass was up over 3% at the close as the luxury watch company logged SG$96.3 million in profit attributable to owners in the fiscal first half, compared with SG$75.7 million a year earlier.

Meanwhile, Samudera Shipping Line signed contracts with Jiangsu New Yangzi Shipbuilding and Jiangsu Yangzi-Mitsui Shipbuilding for two new 3,000 TEU container vessels. Shares closed flat.