Singapore's Straits Times Index ended flat on Thursday, following overnight declines in US and European markets and rising treasury bond yields that prompted sell-offs.

During the day, the benchmark Singapore Strait Times Index ranged between 3,307.54 and 3,326.65, ending 0.01% or 0.180 points higher at 3,323.38.

In company news, shares of Oceanus Group (SGX:579) soared over 22% after it signed a 200 million yuan investment intention agreement with Shaoxing Huangjiu Town.

Grand Venture Technology's (SGX:JLB) shares were up nearly 10% after it posted an after-tax net profit of SG$2 million in the first quarter, up over 34% from SG$1.5 million a year earlier, reflecting revenue growth across all business segments.

Oxley Holdings (SGX:5UX) was down over 3% after it struck off its subsidiaries, Orchard Suites Residence, Oxley Connections and Oxley Jasper, from the register.