U.S. stock indexes slipped on Thursday after three straight days of gains following positive updates on the Omicron coronavirus variant, with focus now turning towards inflation data for clues on the Federal Reserve’s policy decision. Ten of the 11 major S&P sectors declined, with real-estate, energy and consumer discretionary shares falling the most. Heavyweight technology stocks including Microsoft Corp., Nvidia Corp. and Tesla Inc. fell to weigh the most on the Nasdaq index, while Apple Inc. and Meta Platforms rose. The iPhone maker’s shares were about $7 shy of their mark to reach $3 trillion in valuation that would make the company as big as the world’s fifth-largest economy after Germany. “As Apple gets bigger and bigger, it’s a reminder of the dominance of those stocks … that could make things difficult for investors who are not really looking to own those names,” said David Keller, chief market strategist at …