CNBC | US Top News and Analysis Follow Qualcomm shares fall after China opens antitrust probe into the U.S. chip giant Qualcomm has a big business in China selling its smartphone chips to some of the biggest players in the country such as Xiaomi. https://www.cnbc.com/2025/10/10/qualcomm-shares-today-after-china-opens-antitrust-probe.html cnbc.com