WeChat, and its Chinese equivalent Weixin, have a combined 1 billion users, but have long been criticised for censoring posts and messages in China and for submitting to demands for information about users from the Chinese state.
Neil Campling, head of TMT at Mirabaud Securities, said: “US companies will be scrambling their lawyers to work out the implications. WeChat is an essential channel for not just communications but also for brands to get access to consumers.
“Mr Trump risks cutting off that whole area of growth for many corporates.”
His concerns were echoed by legal experts, who warned that US