Economic agencies revise previously published data as better survey responses, tax records, and benchmarks become available. GDP, payrolls, and unemployment all change after initial publication. Some series like the fed funds rate and treasury yields are never revised.Documentation Index
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Use this file to discover all available pages before exploring further.
How GDP revisions work
The Bureau of Economic Analysis (BEA) publishes GDP on a schedule:Advance estimate (~30 days)
First look at the quarter. Based on incomplete survey data. This is the number that moves markets.
Second estimate (~60 days)
More survey responses incorporated. Typically moves the number by a few billion.
Querying revisions
Pass a specific observation date to see every published value:| Published | Value | What changed |
|---|---|---|
| 2023-10-26 | 22,491.567 | Advance estimate |
| 2023-11-29 | 22,506.365 | +$14.8B |
| 2023-12-21 | 22,490.692 | -$15.7B |
| 2024-09-26 | 22,780.933 | +$290.2B (annual revision) |
| 2025-09-25 | 22,840.989 | +$60.1B (annual revision) |
Which series get revised?
| Series | Revised? | Pattern |
|---|---|---|
| GDPC1 (GDP) | Yes | 3 estimates + annual revisions |
| CPIAUCSL (CPI) | Rarely | Seasonal factors updated each February |
| UNRATE (Unemployment) | Yes | Monthly revisions, annual benchmark |
| PAYEMS (Payrolls) | Yes | Two monthly revisions + annual benchmark |
| FEDFUNDS (Fed Funds) | No | Set by the Fed, published once |
| Treasury yields | No | Market rates, final on the day |
Revisions + point-in-time
Revisions tell you how a data point changed. Point-in-time queries tell you what was known when. Use both:as_of for backtesting, revisions for understanding how much a number moved.