Federal Reserve Chair John Williams stated that we need to wait for December data to more accurately assess inflation trends, as current data is not sufficient to confirm a continued decline in inflation. November CPI data may be underestimated due to technical factors, partly because data collection in the first half of October and November was not normal, leading to distortions in some components or a downward pressure on CPI by about 0.1 percentage points. November CPI year-over-year was 2.7%, below the market expectation of 3.1%. (CNBC)