Singapore shares clocked massive losses on Monday, losing more than 2%, tracking a similar pattern across the region amidst the US-Israel attacks on Iran during the weekend, with the conflict spilling over to the rest of the world.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 4,875.59 and 4,920.20 throughout the day. It ended the session at 4,890.86, down 104.21 points or 2.1% compared to Friday's close.

In corporate news, shares of Rex International (SGX:5WH) surged nearly 18% at the close, even as its loss attributable to owners widened to $109.1 million in the second half of 2025 from $32.4 million a year earlier.

Yangzijiang Maritime Development's (SGX:8YZ) shares were down over 3% as its profit attributable to equity holders declined 5% in 2025 to $129.7 million from $135.9 million a year earlier.

Meanwhile, shares of Nam Cheong (SGX:1MZ) were down over 2% at the close, as its profit attributable to owners climbed 17% in the second half of 2025 to 189.6 million ringgit from 161.4 million ringgit a year earlier.