Regarding the contribution of commodity and service groups to the inflation rate recorded during the first nine months of 2026, inflation was driven by the contribution of the rents item by about 0.72 percentage points, while transport contributed about 0.66 percentage points, oils and fats about 0.27 percentage points, and tobacco and cigarettes about 0.17 percentage points.
As for the inflation recorded in September 2026 compared to the same month in 2025, it was driven by the contribution of a number of goods and services, most notably the transport group by about 1.13 percentage points, followed by the rents item with a contribution of 0.76 percentage points, and the oils and fats item by about 0.29 percentage points.
Conversely, the decline in the prices of a number of items limited the rise in inflation during September, most notably the vegetables, dry and canned legumes item, which contributed to reducing the inflation rate by about 0.21 percentage points, fruits and nuts by about 0.18 percentage points, and dairy products and eggs by about 0.04 percentage points.
It is noteworthy that the calculation of the Consumer Price Index (inflation) is based on a basket of consumer goods comprising 850 items, including 325 food items and 525 non-food items, and a survey sample size of 3,400 establishments from which the prices of goods and services are collected.
