Definition
The CPI is calculated monthly by Statistics Canada. It measures the price change of a reference basket representing typical Canadian household spending: food (16%), shelter (29%), transportation (19%), health care (6%), recreation (12%), clothing (5%), and other (13%).
Shelter is the heaviest CPI component and includes: homeowners' replacement cost (proxy for purchase cost), mortgage interest costs, rents, property taxes, and utilities. A rise in mortgage rates paradoxically increases CPI via the 'mortgage interest costs' component.
Core inflation measures (excluded from formal target but monitored by BoC): CPI-median, CPI-trim, CPIX (excluding food and energy).