Singapore's stock market closed lower on Monday, responding to the Monetary Authority of Singapore's plans to rejuvenate the city-state's stock market.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 3,923.28 and 3,951.64 throughout the day. It ended the session at 3,927.75, down 2.19 points or 0.06% compared to Friday's close.

In economic news, Singapore's MAS core inflation, which excludes the cost of accommodation and private transport, fell to 0.8% year on year in January, from 1.7% in December 2024, due to lower inflation across all broad core categories.

In company news, Vallianz's (SGX:WPC) shares surged nearly 13% after the company reported a higher attributable profit to owners of the company of $18.0 million during the second half of 2024 from SG$4.1 million a year earlier.

Raffles Medical's (SGX:BSL) shares were up nearly 7% at the close after its attributable profit rose 4.3% in the second half of 2024 to SG$31.6 million from SG$30.3 million a year earlier.

Meanwhile, shares of Sats (SGX:S58) were down over 3% even after the company's attributable profit to owners surged 124% in the fiscal quarter ended Dec. 31, 2024, to SG$70.4 million from SG$31.5 million a year earlier.