Geopolitical worries are clouding the outlook for US stocks, even as Russia’s invasion of Ukraine moderates expectations for how aggressively the Federal Reserve will tighten monetary policy in coming months. Concerns over the conflict weighed on the S&P 500.SPX on Friday, as the index pared a rally that has seen it rise 5.2% from its Feb 24 intraday low. The see-saw moves come as investor hopes that the Fed may raise rates less severely than anticipated vied with worries about inflation and higher commodity prices, stoked by sanctions against Russia, one of the world’s biggest commodity expor…