Mainland-listed technology shares surged on Monday, driven by expectations of support from Beijing in response to US moves on Chinese-owned software companies.

A gauge for Shanghai’s Star board of tech startups climbed as much as 6.6% to set a fresh record high in morning trade, while Shenzhen’s ChiNext Index rose as much as 2.4%.

The gains come amid signs that the US will announce measures against Chinese-owned software deemed to pose national-security risks. President Donald Trump last week said he planned to ban TikTok, the popular music-video app owned by ByteDance Ltd., one of China’s biggest tech companies.

Comments by US Secretary of State Michael Pompeo suggest a possible widening of US measures beyond the popular app. Microsoft Corp. was said to be exploring an acquisition of TikTok’s operations in the US.

“Investors hold the belief that whatever sector the US bans, China will step up support in that area to push for greater development at home,” said Zhang Gang, a strategist with Central China Securities Co. “Following the threat of the TikTok ban, there are growing expectations that more supportive policies could be rolled out to boost the technology sector, and that’s lifting the related shares.”

Guangdong Advertising Group Co., which provides marketing services on ByteDance platforms including TikTok, surged by 10% daily limit, while Shunya International Martech (Beijing) Co., whose wholly-owned unit handles TikTok ads for clients, also jumped 10% to a fresh all-time high. Co., which cooperates with Douyin -- the Chinese equivalent of TikTok -- over supply chain and live broadcasting segments, added as much as 7.4%.