The Federal Reserve raised its benchmark interest rate to 3.75%-4% on September 16, 2026, to combat elevated inflation, making borrowing more expensive across mortgages, auto loans, and credit cards. However, the rate hike disproportionately affects weaker sectors like housing while leaving booming AI investment largely unscathed, creating a two-speed economy. The decision reflects the Fed's commitment to its 2% inflation target amid persistent price pressures, including oil price increases from geopolitical tensions.