ipu
INFLATION PROTECTION UNIT

A reference for
lasting value.

A daily index of U.S. consumer prices,
designed for agreements that extend beyond today.

Explore IPU Index Read the methodology
OFFICIAL CPI DATAPUBLIC METHODOLOGYDAILY REFERENCE VALUESRESEARCH PREVIEW
THE IPU INDEX

The purchasing power reference.

View data provenance
IPU Index RESEARCH128.2465As of 2026-09-13 · UTC
Cumulative purchasing power adjustment+28.25%Since illustrative base date
Base index value100.000001 January 2021 · Illustrative base
PURCHASING POWER, OVER TIME

IPU Index · Historical series

IPU Index2026-09-13 128.2465
951041141231322021-012022-052023-102025-022026-09
Illustrative base: 01 Jan 2021 = 100 · Historical reconstruction · Missing CPI periods omittedExplore the index

Based on U.S. CPI-U NSA · Source snapshot retrieved 2026-09-12 · Daily interpolation of published monthly data. Research values are not approved for settlement.

HOW THE INDEX WORKS

Published data.
A calculation you can check.

IPU puts changes in U.S. consumer prices on a daily scale. The source series, reference dates and rounding rules are published, so you can work through the calculation yourself.

Understand the methodology

Official inputs

One defined series: U.S. CPI-U, all items, not seasonally adjusted.

A reproducible calculation

Three-month lag and daily interpolation, following the Treasury reference CPI approach.

Traceable values

Each result identifies its source snapshot and methodology version.

APPLICATIONS

For the life of an agreement.

Contracts, planning and data systems.
01

Long-term contracts

Specify how a payment should change as consumer prices move.

Explore contracts
02

Institutional planning

Compare commitments over time using the same CPI reference.

For institutions
03

Data integration

Retrieve daily values, source observations and calculation metadata.

Developer resources
IPU Coin logo
IPU COIN · RESEARCH STAGE

An inflation-resistant stablecoin.

IPU Coin explores a target dollar value that moves with consumer prices through the IPU Index. The design aims to account for inflation over time; reserves and redemption terms remain to be established.

Research proposal · No token issued
Explore IPU Coin
SOURCE DATA & DISCLOSURES

Follow the number back to its source.

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