The Federal Reserve's October 28 decision to hold the federal funds rate steady at 3.75–4.00 percent, following the September hike, has reinforced trader focus on inflation persistence and the high likelihood of a December move, with markets pricing in an 85–87 percent chance of a 25-basis-point increase. The S&P 500 closed October 28 at 7,743.98 amid resilient economic data, upgraded Fed growth assessments, and third-quarter earnings growth estimated at 31.8 percent year-over-year, driven by technology and AI infrastructure spending. Upcoming October 29–30 releases of the PCE inflation gauge and advance Q3 GDP will further shape rate-path expectations and equity multiples into month-end, with the index trading near its recent range after a 12.4 percent year-over-year advance.