Sep 27

FRED PCOPPUSDM observable history vs pull date (ALFRED vintages)

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A number is a value plus an arrival time
Three nights in FRED's vintage archive and the World Bank's own spreadsheet. Same series id, four different histories. Two publishers, two different May 2026 copper prices. And why the crystal-structure databases have exactly the same problem.

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Step plot: the earliest month FRED serves for PCOPPUSDM as a function of the date you pull it. Built from 90 cached ALFRED vintages. Three family-wide shape events (2019-07-23, 2026-01-22, 2026-03-24) move the series start with zero value changes in the overlap.

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Connections

1

Referenced by

A number is a value plus an arrival time
Three nights in FRED's vintage archive and the World Bank's own spreadsheet. Same series id, four different histories. Two publishers, two different May 2026 copper prices. And why the crystal-structure databases have exactly the same problem.

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