Singapore shares continued their downward spiral, tracking losses in most regional markets, following the US Federal Reserve's decision to cut borrowing costs by 25 basis points.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 4,308.50 and 4,327.89 throughout the day. It ended the session at 4,312.62, down 11.16 points or 0.26% compared to Wednesday's close.

In company news, shares of mm2 Asia (1B0.SI) plunged over 33% at the close as its associated company, MM2 Star Screen, received a writ of summons and statement of claim from Antenna Entertainments filed in the High Court of Malaya.

H2G Green (SGX:5AI) was up over 15% after its subsidiary, GasHubUnited, completed and commissioned a liquefied natural gas facility to a Singapore-based F&B manufacturer.

Meanwhile, shares of Serial Achieva (XHV.SI) were down over 10% after its subsidiary, Achieva Cloud Services, secured a data center project in Malaysia worth $22 million.