U.S. Indexes Trim Gains After Strong Week

Plus: American Express shares fell after its outlook for the year disappointed investors. Verizon stock rose after beating Wall Street expectations. And Novo Nordisk surged after positive results from a clinical trial of an experimental weight loss drug. Danny Lewis reports. Sign up for the WSJ's free What's News newsletter.  Learn more about your ad choices. Visit megaphone.fm/adchoices