https://www.cnbc.com/2019/01/03/apple-china-worries-highlight-us-companies-trade-war-vulnerabilities.html > Apple — one of the world's most valuable public companies by market capitalization and a bellwether for the technology sector — slashed its revenue guidance on Wednesday, highlighting just how vulnerable large American companies are to the ongoing U.S.-China trade war. > Apple CEO Tim Cook told CNBC's Josh Lipton that the trade dispute between the world's two largest economies is exacerbating economic issues in China, which is an important source of revenue for the company