Shares of Zscaler Inc ZS.O rose 20.63% after the cloud security company raised its annual forecast. By Shreyashi Sanyal, Shristi Achar A and Carolina Mandl May 8 (Reuters) - U.S. stocks paused on Monday after a strong rally in the prior session as investors shift focus to a key inflation reading later this week. The spotlight this week will be on the Labor Department's inflation reading on Wednesday, which is expected to show the consumer price index (CPI) likely climbed 0.4% in April after gaining 0.1% in March.