Table 4 
Consumer Price Index statistics, preferred measures of core inflation – Bank of Canada definitions, year-over-year percent change, Canada1,2 

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Consumer Price Index statistics, preferred measures of core inflation – Bank of Canada definitions, year-over-year percent change, Canada,
  September
2018		 October
2018		 November
2018		 December
2018
  % change% change% change% change
CPI-common3,5 1.9 1.9 1.9 1.9
CPI-median4,6 1.9 1.9 1.8 1.8
CPI-trim4,7 2.0 2.1 1.9 1.9
Source(s):
Table 18-10-0256-01.

Table note 1

For more information on these measures of core inflation, please consult the methodology and general information documents found in our Definitions, data sources and methods - record number 2301.

Table note 2

The Bank of Canada's preferred measures of core inflation, CPI-common, CPI-median and CPI-trim, are subject to revision. In the case of CPI-median and CPI-trim, this results from the fact that these measures are based on seasonally adjusted price index series. In the case of CPI-common, revisions are due to the statistical technique used, as the factor model is estimated over all available historical data. The table 18-10-0259-01 contains the historical release data for these three measures and will be updated every month.

Table note 3

This measure is based on the Consumer Price Index (CPI) series adjusted to remove the effect of changes in indirect taxes.

Table note 4

This measure is based on CPI series that have been treated to remove the effect of changes in indirect taxes, and that have been seasonally adjusted.

Table note 5

CPI-common is a measure of core inflation that tracks common price changes across categories in the CPI basket.

Table note 6

CPI-median is a measure of core inflation corresponding to the price change located at the 50th percentile (in terms of CPI basket weights) of the distribution of price changes in a given month.

Table note 7

CPI-trim is a measure of core inflation that excludes CPI components whose rates of change in a given month are located in the tails of the distribution of price changes.
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