About

A neutral yardstick for money.

Every exchange rate is a ratio of two currencies, so every move has two readings: "the dollar fell" or "the lira rose". TEYMUR removes the ambiguity. It prices each currency against the whole world's money at once — a GDP-weighted mass of member currencies — in a synthetic unit called TYMR. One number per currency per day, computed by a written rule, published once and never revised.

What TEYMUR is

• An index of world money. Member currencies are combined by their share of world nominal GDP (IMF World Economic Outlook, point-in-time vintages) into a weighted geometric mass. Today the index has 29 members; membership follows a threshold rule, not discretion.
• A unit of account: TYMR. On 3 January 2005, 1 USD = 1 TYMR. From that anchor the series {CCY}TYMR states how many TYMR one unit of a currency buys. Rising means the currency gained against world money; falling means it lost.
• Two layers. The Official value is computed once per TARGET business day from central-bank reference rates and is immutable once published. The Live value is a 10-minute indicator from market rates under the same weights and constant — useful for orientation, not a substitute for the official value.
• A verifiable record. Inputs, weights, chain events and outputs are stored so that any published day can be recomputed from its inputs. The full recipe is on the methodology page.

What TEYMUR is not

TEYMUR is not a currency, not an asset, not a forecast and not a recommendation. It carries no claim about where any exchange rate is going. It is a measurement, published for information, with a method that is open enough to be checked line by line.

Reading the site

• Index — the latest official day: all currencies in TYMR, period changes, weights, breadth and the live indicator.
• Currencies — one page per currency (for example USDTYMR) with the full history since 2005, ranges, volatility, membership and the input used for the latest day.
• Day — any official day since 3 January 2005, with every currency's value and its change against the previous official day.

Publisher

TEYMUR is designed, computed and published by Keltis, an AI company pointed at financial markets, operating from two bases. TEYMUR and TYMR are designations of Keltis.

Data and reuse

Published values may be referenced with attribution ("TEYMUR Index, Keltis"). Machine-readable files — latest values, full series, immutable daily snapshots and the manifest chain — are prepared for publication; a public data endpoint will be announced on the methodology page. Terms, privacy and the investment disclaimer are on the legal page.

See today's index →