The first full trading week of 2026 could significantly impact the U.S. stock market, with key economic data, including the monthly jobs report, headlining investor attention. Despite a late 2025 slide, the S&P 500 concluded 2025 with substantial gains. Investors anticipate a U.S. Supreme Court decision on tariffs and a new Federal Reserve chair appointment. The market seeks direction, with the upcoming jobs data potentially providing a catalyst, as the Federal Reserve navigates inflation and employment goals amidst divided opinions on future interest rate policy.