Energy stocks including Occidental Petroleum Corp OXY.N, APA Corp APA.O and Chevron Corp CVX.N fell between 1.3% and 4% as oil prices declines sharply. By Medha Singh May 11 (Reuters) - Wall Street's main indexes were set to open sharply lower on Tuesday, signaling another day of losses for technology-related stocks with lofty valuations on worries over inflation. The yield on benchmark U.S. 10-year Treasury note US10YT=RR ticked up to 1.604% ahead of consumer price index report on Wednesday, with investors fearing a strong reading could prompt the Federal Reserve to alter its ultra loose monetary policy.