U.S. stock indexes fell more than 1 percent on Monday, dragged by concerns about the impact of tighter COVID-19 curbs on the global economy, and a potentially devastating setback to President Joe Biden’s investment bill. Surging global infections of the Omicron coronavirus variant have sparked worries in financial markets as many European nations and Britain weigh the possibility of restrictions during Christmas. Travel stocks fell the most, with the S&P 1500 airlines index dropping 2.0 percent. Royal Caribbean Group slipped 1.8 percent after saying 48 people on its Symphony of the Seas cruise ship tested positive for COVID-19. “Typically what happens in Europe is a bit of a preview for what we see in the United States. So, if we see a lot more infections in the U.S., it could stress hospitals, make people less reluctant to get out, spend, and partake in the economy. That’s definitely a cause of …