Plus: China has concluded \u201caround-the-clock\u201d military drills around Taiwan. Barclays will replace Goldman Sachs as the exclusive issuer of General Motors credit cards next year. J.R. Whalen reports.\n\n\n\nSign up for the WSJ's free What's News newsletter.\xa0\n\nLearn more about your ad choices. Visit megaphone.fm/adchoices