Amazon falls after guidance disappoints and cloud-computing growth misses estimates, Affirm jumps after fiscal second-quarter earnings beat analysts’ forecasts, and Pinterest soars after posting its ...

Pershing Square Capital Management Chief Executive Officer Bill Ackman said he took down a critical post about UnitedHealth Group Inc. after the company’s lawyers told him the claims about the company ...

Former bond king Bill Gross says that the hot energy pipeline stocks “‘seem to be topping” after a big run and that he has ...

Lawmakers are said to be working on a bill to block the Chinese chatbot app from government devices, underscoring concerns ...