The third quarter of 2026 brought modest gains for U.S. equities amid rising oil prices, persistent inflation, and tighter Federal Reserve policy. While the S&P 500 remained relatively resilient, higher Treasury yields pressured bond markets, and ongoing tensions in the Persian Gulf continued to affect energy costs. Rothschild Wealth Partners examines the economic forces shaping markets, the influence of AI infrastructure investment, and what investors may want to consider as the year draws to a close.