Microsoft, Lennar fall; Apellis, US Steel rise May 17, 2021 FacebookTwitterEmail AT&T Inc., down 87 cents to $31.37. The telecom giant will combine media businesses including CNN and HBO with Food Network-owner Discovery. United States Steel Corp., up 86 cents to $26.36. The European Union and the U.S. will temporarily suspend measures at the heart of a steel tariff dispute. Newmont Corp., up $3.25 to $74. The gold company completed its buyout of GT Gold. Marathon Petroleum Corp., up $1.44 to $61.52. Oil prices ticked higher and helped lift energy company stocks. Apellis Pharmaceuticals Inc.,...