Singapore shares posted gains on Tuesday, gaining more than 1% at the close, despite mixed results in the regional markets, with investors responding positively to a potential end to the US government shutdown.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 4,499.41 and 4,552.05 throughout the day. It ended the session at 4,542.20, up 54.07 points or 1.2% compared to Monday's close.

In company news, shares of Riverstone (SGX:AP4) were down over 6% at the close as its attributable profit to equity holders in the third quarter declined to 52.0 million ringgit from 72.2 million ringgit a year earlier.

CSE Global (SGX:544) was down over 6% after it agreed to grant nearly 63 million warrants to Amazon.com NV Investment at SG$0.7671 per share.

Aoxin Q & M Dental Group (SGX:1D4) was up nearly 13% with the company targeting to raise over SG$15.3 million through a renounceable non-underwritten rights issue of up to 511.5 million shares.