Macro & Inflation Nowcast · daily ban:high tC

Walmart grocery fixed-basket index

Daily price of ~60 fixed UPCs (milk, eggs, bread, ground beef, bananas, chicken breast, etc.) via Walmart's grocery.walmart.com item API/GraphQL by zip

Feed detail

Domain

Macro & Inflation Nowcast

Measures

Daily price of ~60 fixed UPCs (milk, eggs, bread, ground beef, bananas, chicken breast, etc.) via Walmart's grocery.walmart.com item API/GraphQL by zip

Source

grocery.walmart.com item pages / internal GraphQL endpoint (unofficial, reverse-engineered)

Access

json-api

Cadence

dailyupdates once a day

Thesis

Walmart is the single largest US grocery seller; fixed-SKU repricing leads the BLS Food-at-Home CPI print by 3-5 weeks since retailers reprice continuously while BLS samples monthly

Maps to

CPI Food at Home, grocery inflation nowcast

Crowdedness

contested

Tier

Ban-risk

ban:high

Where this stands

This is a catalogued data feed with a research idea attached, not a validated edge. Being listed here means it has a specific source and a one-sentence causal mechanism mapped to what it should move — it doesn’t mean it has cleared the five-stage validation gate (point-in-time hygiene, out-of-sample holdout, multiple-testing correction, and the portfolio-layer backstop). As of today, every score on this site is prior-only; zero signals in the catalog have been promoted to “measured” status. See the methodology page for the full validation process and current counts.

Browse the rest of Macro & Inflation Nowcast — High-frequency price and activity series that nowcast CPI, GDP, and other macro prints before the official release.