Singapore shares recovered to surge on Tuesday as the city-state reported a cool down in its core inflation during August, while the regional indices closed mixed ahead of US inflation data that could have a bearing on the Federal Reserve's future interest rate policy.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 4,281.03 and 4,315.16 throughout the day. It ended the session at 4,302.67, up 5.30 points or 0.12% compared to Monday's close.

In economic news, Singapore's core inflation, which excludes the cost of accommodation and private transport, cooled to 0.3% in August from 0.5% in July.

In company news, shares of iWOW Technology Limited surged nearly 31% at the close after it unveiled plans to raise around SG$3 million through the issuance of 15 million shares to shareholder Mehta Vimesh Piyush at SG$0.20 apiece.

Mooreast was up nearly 3% as it agreed to collaborate with Chinese state-owned infrastructure developer, China Communications Construction Company.

Meanwhile, shares of Keppel DC Reit were up over 1% after it agreed to acquire a 98.47% stake in Tokyo Data Centre 3 in Japan for 82.1 billion Japanese yen.

STI up 0.1%; iWOW Technology up 31%; Seatrium up 4%; Yangzijiang Shipbuilding rose 1%; Singtel fell 2%.