Plus: Amgen shares decline following disappointing results from a late-stage study of a drug that would treat a type of eczema. Berkshire Hathaway sold $863 million of Bank of America shares from Friday through Tuesday. 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