Gains in financial and healthcare shares bolstered the three main U.S. stock indexes on Monday, with investors focusing on developments around the Russia-Ukraine crisis and the upcoming Federal Reserve policy meeting. The conflict has hammered global financial markets and fueled concerns about runaway inflation as oil prices skyrocketed in the wake of tough Western sanctions against Russia, a top commodity exporter. Talks between Ukraine and Russia paused on Monday and will continue on Tuesday, one of Ukraine’s negotiators said on Twitter. Kyiv had begun “hard” talks on a ceasefire, immediate withdrawal of troops, and security guarantees with Moscow, despite the shelling of a residential building in Kyiv. “What we should be focused on is that talks are going to continue between Russia and Ukraine. That’s a positive,” said Thomas Hayes, chairman and managing member at Great Hill Capital in New York. Seven of the 11 major S&P sectors advanced in …