https://www.reuters.com/article/us-usa-wechat-trump-stocks/u-s-listed-chinese-stocks-fall-as-trump-takes-aim-at-wechat-tiktok-idUSKCN2532EF >U.S.-listed shares of Chinese firms fell on Friday, a day after President Donald Trump unveiled bans on U.S. transactions with the China-based owners of messaging app WeChat and video-sharing app TikTok, escalating tensions between the two countries.