Also after the bell, Starbucks SBUX.O dipped 2.7% following its quarterly report, in which it lifted its annual forecast. By Noel Randewich and Krystal Hu April 27 (Reuters) - Tepid results from Tesla and 3M weighed on Wall Street on Tuesday, with the S&P 500 and Dow ending near flat as investors focused on wave of earnings reports from Microsoft, Alphabet and other corporate heavyweights. Investors will monitor the Federal Reserve's two-day meeting for cues on the central bank's thinking on inflation, bond buying and risks to the financial system posed by soaring asset prices.