The Consumer Price Index for All Urban Consumers (CPI-U) for the South increased 0.7 percent in September, the U.S. Bureau of Labor Statistics reported today. The energy index rose 6.8 percent over the month. The all items less food and energy index and the food index each edged up 0.2 percent in September. (Data in this report are not seasonally adjusted. Accordingly, month-to-month changes may reflect the impact of seasonal influences.)

The all items CPI-U increased 2.4 percent since September 2016. The all items less food and energy index moved up 1.7 percent over the last 12 months, and the energy index advanced 11.8 percent. The food index rose 1.0 percent over the year. (See chart 1.)

Food

The food index edged up 0.2 percent in September. Over the month, prices for food away from home edged up 0.3 percent, and prices for food at home inched up 0.1 percent.

The food index rose 1.0 percent since September 2016, reflecting higher prices for food away from home, up 2.1 percent. Over the year, prices for food at home edged up 0.2 percent.

Energy

The energy index rose 6.8 percent in September, led by a 15.7-percent increase in motor fuel prices. The electricity and utility (piped) gas service indexes declined over the month, down 0.5 and 1.3 percent, respectively.

From September 2016—September 2017, energy prices advanced 11.8 percent, reflecting a 23.6-percent increase for motor fuel prices. Prices for electricity and utility (piped) gas service also rose, up 1.3 and 8.5 percent, respectively.

All items less food and energy

The all items less food and energy index edged up 0.2 percent in September. Several categories recorded increases, most notably shelter (0.4 percent) and apparel (3.3 percent).

Since September 2016, the all items less food and energy index advanced 1.7 percent, led by an increase in the shelter index (3.3 percent).

Table A. South region CPI-U 1-month and 12-month percent changes, all items index, not seasonally adjusted

Month	2013		2014		2015		2016		2017
	1-month	12-month	1-month	12-month	1-month	12-month	1-month	12-month	1-month	12-month
January	0.4	1.6	0.3	1.7	-0.7	-0.4	0.0	1.2	0.5	2.6
February	0.9	1.8	0.4	1.2	0.5	-0.3	0.1	0.7	0.2	2.8
March	0.3	1.5	0.6	1.5	0.6	-0.3	0.6	0.7	0.0	2.2
April	-0.2	0.9	0.5	2.3	0.3	-0.6	0.4	0.9	0.2	2.0
May	0.0	1.3	0.2	2.4	0.4	-0.4	0.4	0.9	0.0	1.7
June	0.4	1.9	0.2	2.3	0.5	-0.1	0.4	0.8	0.2	1.5
July	0.2	2.2	-0.1	2.0	-0.1	-0.1	-0.2	0.7	-0.2	1.6
August	0.1	1.7	-0.2	1.7	-0.2	-0.2	0.1	1.0	0.4	1.9
September	0.0	1.3	0.1	1.7	-0.2	-0.4	0.2	1.4	0.7	2.4
October	-0.2	1.3	-0.3	1.6	0.0	-0.1	0.1	1.5
November	-0.3	1.5	-0.6	1.3	-0.2	0.3	-0.1	1.6
December	0.1	1.8	-0.6	0.6	-0.4	0.5	0.1	2.0

The Consumer Price Index for October 2017 is scheduled to be released on Wednesday, November 15, 2017.

Technical Note

The Consumer Price Index (CPI) is a measure of the average change in prices over time in a fixed market basket of goods and services. The Bureau of Labor Statistics publishes CPIs for two population groups: (1) a CPI for All Urban Consumers (CPI-U) which covers approximately 89 percent of the total population and (2) a CPI for Urban Wage Earners and Clerical Workers (CPI-W) which covers 28 percent of the total population. The CPI-U includes, in addition to wage earners and clerical workers, groups such as professional, managerial, and technical workers, the self-employed, short-term workers, the unemployed, and retirees and others not in the labor force.

The CPI is based on prices of food, clothing, shelter, and fuels, transportation fares, charges for doctors' and dentists' services, drugs, and the other goods and services that people buy for day-to-day living. Each month, prices are collected in 87 urban areas across the country from about 6,000 housing units and approximately 24,000 retail establishments—department stores, supermarkets, hospitals, filling stations, and other types of stores and service establishments. All taxes directly associated with the purchase and use of items are included in the index.

The index measures price changes from a designated reference date (1982-84) that equals 100.0. An increase of 16.5 percent, for example, is shown as 116.5. This change can also be expressed in dollars as follows: the price of a base period "market basket" of goods and services in the CPI has risen from $10 in 1982-84 to $11.65. For further details see the CPI home page on the Internet at www.bls.gov/cpi and the BLS Handbook of Methods, Chapter 17, The Consumer Price Index, available on the Internet at www.bls.gov/opub/hom/pdf/homch17.pdf.

In calculating the index, price changes for the various items in each location are averaged together with weights that represent their importance in the spending of the appropriate population group. Local data are then combined to obtain a U.S. city average. Because the sample size of a local area is smaller, the local area index is subject to substantially more sampling and other measurement error than the national index. In addition, local indexes are not adjusted for seasonal influences. As a result, local area indexes show greater volatility than the national index, although their long-term trends are quite similar. NOTE: Area indexes do not measure differences in the level of prices between cities; they only measure the average change in prices for each area since the base period.

The South region is comprised of Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia, and West Virginia.

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