1# data/README.md — F3-conf-0423## cpi_monthly.csv4- **Series**: Bank of Canada Valet series **V41690973** — Total CPI (Consumer Price Index, all-items, Canada, index 2002 = 100, **not seasonally adjusted**, monthly; published by Statistics Canada, table 18-10-0004-01, redistributed by the Bank of Canada).5- **Retrieval URL**: https://www.bankofcanada.ca/valet/observations/V41690973/json?start_date=1995-01-016- **Retrieved (UTC)**: 2026-10-30T03:25:10Z. Terms: https://www.bankofcanada.ca/terms/7- **Format**: `month` (YYYY-MM-01), `cpi` (index, one decimal, as served). 381 rows, 1995-01 to 2026-09-01. SHA-256 855d069176369d30d02cbbe0cc6456b76d2f3967cdaabc1b362c2461ef9015a2.89## cpi_quarterly.csv10Derived from the monthly file: `quarter` (first month of the quarter, YYYY-MM-01), `cpi_avg` (arithmetic mean of the three monthly index values, 6 decimals), `infl_annualised` (target series: 400 × (ln cpi_avg_q − ln cpi_avg_{q−1}), percent at annual rate, 6 decimals; empty for 1995Q1). Only complete quarters (three months) are included: 127 rows, 1995Q1 to 2026-07-01. SHA-256 c8652dec1567ec35e3b84ee8fa55545e9bf0ae4990a4d6d05b89a6d22f6801ea. Because the index is not seasonally adjusted, the quarterly inflation series has a pronounced seasonal pattern.1112## Vintage caveat13The CPI is not revised after publication (except for the periodic basket updates applied to the index chain by Statistics Canada), so the current vintage is essentially the real-time series; nevertheless the exercise treats a quarter's value as known at the end of that quarter (the actual publication occurs about three weeks after the last month), and no claim of historical real-time performance is made.14