A better-than-expected second-quarter profit at Celgene Corp. and news of a planned exit by Gilead Sciences Inc. CEO John Milligan led a parade of earnings news, carried by a drumbeat of estimate-beating results at companies including Alexion Pharmaceuticals Inc., Vertex Pharmaceuticals Inc. and Alkermes plc as demand for key products at the companies grew. Pricing pressures remained a specter, gaining at least some outward acknowledgment at Celgene, while tariff troubles dogging other sectors remained, blissfully for biopharma investors, at bay. Amgen Inc. also reported earnings following the market's close.