U.S. stock indexes held near record levels on Tuesday, with the S&P 500 and Dow Jones Industrial Average touching new highs before closing mixed ahead of the Federal Reserve's anticipated interest rate decision. The Fed is expected to announce its first rate cut in over four years on Wednesday, with market speculation divided between a 25 and 50 basis point reduction. Retail sales data showed a 0.1% increase in August, surpassing expectations and indicating economic resilience. Microsoft shares rose after a dividend hike and a new share buyback program, while Intel gained on news of a collaboration with Amazon. Overall, market sentiment remains cautious as traders await the Fed's move and its implications for the economy.