On a seasonally adjusted basis, the Consumer Price Index for All Urban Consumers (CPI-U) rose 0.5 percent in September, following a 0.1 percent decline in August. For the 12-month period ended in September, the CPI-U increased 3.5 percent.
The September upturn in the CPI-U reflects a sharp turnaround in the energy index, which increased 3.8 percent in September after declining 2.9 percent in August. The food index rose 0.2 percent in September. Excluding food and energy, the CPI-U rose 0.3 percent in September, following five consecutive monthly increases of 0.2 percent.
Consumer prices rose at a seasonally adjusted annual rate (SAAR) of 2.8 percent in the third quarter. This followed increases in the first and second quarters at annual rates of 6.1 and 2.6 percent rate, respectively, and brings the year-to-date annual rate to 3.8 percent. This compares with an increase of 2.7 percent for all of 1999.
Bureau of Labor Statistics, U.S. Department of Labor, The Economics Daily, Consumer prices in September at https://www.bls.gov/opub/ted/2000/oct/wk3/art04.htm (visited November 28, 2023).