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
Published daily fixing RESEARCH128.580702026-10-27 · Published 2026-10-27 15:55:03.459 UTC
Cumulative price adjustment+28.58%Since the illustrative base date
Base index value100.0000001 January 2021 · Illustrative base
Today’s publication window has not closedLast successful source check: 2026-10-27T15:55:03.459Z · Last published date: 2026-10-27Research release · Not approved for settlementPublication records →
RECONSTRUCTED REFERENCE128.59386

2026-10-28 · Calculated from the identified source snapshot under 0.2.0-research. This is a calculation, not evidence of publication on that date.

Download source dataset ↗
RECONSTRUCTED REFERENCE

IPU Index · Historical calculation

IPU Index2026-10-28 128.59386
951041141231322021-012022-062023-112025-052026-10
01 Jan 2021 = 100 · Reconstructed under methodology 0.2.0; unavailable dates remain gapsExplore the index

U.S. CPI-U NSA, with the explicitly registered Treasury contingency input for October 2025. Research values are not approved for settlement.

Published fixing ledger →Public calculation parameters →
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

U.S. CPI-U, all items, not seasonally adjusted. Any registered Treasury contingency is identified separately.

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.

Explore transparency