PacWest Bancorp PACW.O and Zions Bancorporation ZION.O inched lower. By Carolina Mandl and Shristi Achar A May 10 (Reuters) - The S&P 500 and Nasdaq indexes rose on Wednesday, helped by a slightly lower-than-expected increase in April inflation and Alphabet Inc's GOOGL.Olatest artificial intelligence rollout. The Labor Department's Consumer Price Index (CPI) rose 4.9% in April from a year ago, compared with expectations of a 5% increase, raising hopes that the Federal Reserve's interest rate hiking cycle is close to an end.