U.S. markets closed higher on Monday, with the Dow up 0.15%, S&P 500 rising 0.26%, and Nasdaq gaining 0.48%, led by a rebound in AI-related names after last week’s pullback. Gains came despite growing concerns over a potential U.S. government shutdown ahead of the Oct. 1 funding deadline, which could delay key economic data including Friday’s jobs report and add to volatility. Investors remain focused on the Fed’s October policy meeting, with risks tied to a slowing labor market, inflation pressures, and elevated valuations.