Recent August Core PCE data, released September 30 at 3.0% year-over-year against a 3.3% consensus, has anchored trader expectations for the September reading amid BEA annual revisions that lowered prior figures and highlighted persistent but moderating underlying inflation. With 3.0% and 3.1% outcomes holding nearly identical implied probabilities near 34% and 33.5%, markets reflect uncertainty over whether the softer monthly trend—core PCE up just 0.2% in August versus 0.3% expected—will extend, especially as consumer spending accelerated sharply to 0.9%. Key swing factors include October 29 release timing, labor market signals, and any further Fed communications on the 2% target, where even modest upside surprises could shift odds toward 3.2% or higher given the index's role in monetary policy calibration.