The Extended National Consumer Price Index-15 (IPCA-15) was 0.35% in September, 0.07 percentage points above the August rate (0.28%). In the year, the IPCA-15 accumulated an increase of 3.74% and, in 12 months, of 5.00%, above the 4.24% in the previous 12 months. In September 2022, the rate was -0.37%.

The IPCA-E, which is the IPCA-15 accumulated in the quarter, was 0.56%, above the -0.97% recorded in September 2022.

Six of the nine groups surveyed recorded increases in September. The biggest change (2.02%) and the biggest impact (0.41 pp) came from Transportation. The Housing group (0.30% and 0.05 pp) slowed down in relation to the previous month (1.08%). Among the falls, the highlight was Food and beverages (-0.77%), which contributed with -0.16 pp. The other groups were between the drop in Household articles (-0.47%) and the rise in Wearing apparel (0.41%).

The drop in the Food and beverages group (-0.77%) was influenced by the decline in prices of food at home (-1.25%). Of note are the declines in potatoes (-10.51%), onions (-9.51%), carioca beans (-8.13%), long-life milk (-3.45%), meat (-2.73%) and chicken pieces (-1.99%). The prices of rice (2.45%) and fruits (0.40%) rose, especially lemons (32.20%) and bananas (4.36%).

Food away from home (0.46%) accelerated in relation to the previous month (0.22%). There were increases in snacks (0.74%) and meals (0.35%). In August, the changes in these sub-items were 0.14% and 0.35%, respectively.

In the Transportation group (2.02%), gasoline rose 5.18% and was the sub-item with the biggest individual impact on the month's index (0.25 pp). In relation to other fuels (4.85%), diesel fuel (17.93%) and vehicle gas (0.05%) increased, while ethanol (-1.41%) recorded a drop in prices. After a decline of 11.36% in August, there was an increase of 13.29% in airfares (13.29%) in September.

In Transportation, the increase in taxi fares (0.19%) is due to the 20.19% increase in fares from July 24th in Fortaleza (5.54%). In intercity buses (1.05%), there was an increase of 12.90% in Salvador (8.08%), as of August 10th and of 6.00% in Porto Alegre (1.09%), as of from August 1st.

In the Housing group (0.30%), the highlight is the increase in residential electricity (0.66%), influenced by the increase of 9.40% in Belém (8.81%), as of August 15th. The increase in the water and sewage fees (0.12%) is due to the 5.02% increase in Brasília (2.76%), as of August 1st. The drop in piped gas (-0.46%) is due to tariff reductions in two areas of coverage: in Curitiba (-1.47%), a reduction of 2.23%, as of August 4; and in Rio de Janeiro (-0.84%), an average reduction of 1.70%, as of August 1st.

In Health and personal care (0.17%), the highlight was the increase in the health plan item (0.71%), resulting from rises authorized by the National Supplementary Health Agency (ANS) for health plans signed before Law no. 9,656/98, with retroactive effect from July. Therefore, in September's IPCA-15, the monthly fractions of the old plans for the months of July, August and September were appropriated.

As for regional indices, only Salvador (-0.03%) recorded a negative result, with a rate influenced by the drop in the prices of onions (-16.60%) and meat (-3.95%). The biggest change was recorded in Belém (1.00%), due to the increase in residential electricity (8.81%) and gasoline (6.51%).

In order to calculate the IPCA-15, prices were collected from August 15th to September 14th (reference) and compared with those in force from July 14th to August 14th (base). The indicator refers to families with an income of 1 to 40 minimum wages and covers the Metropolitan Areas of Rio de Janeiro, Porto Alegre, Belo Horizonte, Recife, São Paulo, Belém, Fortaleza, Salvador and Curitiba, in addition to Brasília and the municipality of Goiânia. The methodology used is the same as the IPCA's, the difference is in the price collection period and geographic coverage.

Keywords: IPCA-15 é de 0, 35% em setembro e IPCA-E é de 0, 56%