The AMR All Art Index
The All Art Index was created in response to requests for a single index to measure the global art market. The index deliberately includes both rare works and those regularly traded. It is updated every month.
is the same index, built from the same prices, narrowed to the artists who come to auction most often — those with thirty or more sales within two auction years.
All Art
Risen
- Sandro BOTTICELLI4.1%
- Cosimo Rosselli4.0%
- Jan LIEVENS2.8%
- Vincent van GOGH2.5%
- CANALETTO2.3%
Fallen
- TITIAN Tiziano Vecelli−8.8%
- Amedeo MODIGLIANI−5.5%
- Edgar DEGAS−4.5%
- CONSTANTIN BRANCUSI−3.0%
- Joan MITCHELL−2.9%
Each figure is that artist’s share of the month’s total movement — how much of the market’s rise, or its fall, came down to one name — measured across every constituent, not just the five shown. Shares only: no index values, no prices.
What it measures
Why art needs its own method.
The price paid for a work of art at auction is never down to the work alone — it’s also the result of the auctioneer’s craft. Collectors are gathered, estimates set, bidding encouraged. Unlike a share, value is set twice over: once by the object, once by the machinery that stages it. So a market index for art can’t simply be borrowed from finance. The All Art Index measures the global market by covering both — an annually fixed roster of houses, and the artists whose works come to market.
Recent sales count for more than old ones.
Every artist in the index gets a current price drawn from the lots that sold in the twenty-four months ending that month. Sales are weighted by age, so last month’s result carries substantially more weight than one from two years ago, and the price moves as the window slides forward.
The index is the sum of those prices across the whole constituent list. Auction turnover is strongly seasonal — spring and autumn carry the year — so the published series is smoothed to make the trend legible without erasing the seasons.
| Started | 1976, and published continuously since |
|---|---|
| Frequency | Monthly |
| Houses | Thirty-six auction houses worldwide, including their separate salerooms where they exist — a roster set annually and fixed for the year, listed in full in the methodology |
| Constituents | The ten thousand highest-ranked artists at auction worldwide, re-ranked every month — the roster is not fixed, so artists enter and leave as the market changes |
| Two series | All Art (the full list) and All Art Top Traded (the same prices, narrowed to artists with thirty or more sales within two auction years) |
| Window | 24 months, weighted inversely by age — the same window for both series |
| Smoothing | Exponentially weighted at a factor of 0.2 — the series as published. A factor of 0.5, and the unsmoothed series, are available to licensees |
| Prices | Hammer prices — buyer’s premium stripped out — converted to GBP, so every sale reads on the same basis |
| Published as | The Underlying Monetary Value in £, and the same series rebased to 1000 |
Historic values are never restated. A figure published in 1982 reads the same today.
Methodology paper
The full method, in print
The weighting, the constituent selection, the two series, the smoothing, the houses the index draws on and the price basis — stated so the published series can be reproduced from the paper alone.
Download the methodology →PDF · Abdey & Duthy · 2026 edition
Getting the figures
The index itself is licensed.
We publish what the index is doing — the percentage changes, the growth rates, which artists moved the market this month. The index values themselves are the product, and they are supplied under licence rather than posted on a webpage.
What a licence allows
The standard terms let you use the data for your own analysis and internal calculations, and cite All Art in your publications as percentage change or compound annual growth rate over the periods you need — including in cross-asset comparisons.
Those are the standard terms, not the limit of what we will agree. If you need the index inside your own published or aggregate indices, or for something these terms don’t anticipate, ask — we vary the licence where the use makes sense.
One-off
Historic dataset
£595 + VAT
The whole history from 1976 to the last completed year-end, as a single Excel file — both the Underlying Monetary Value and the rebased series.
One-time purchase, delivered by email. No updates and no renewal — if you need current values, take the annual licence.
Twelve months
Annual data licence
£1,095 + VAT, quarterly updates
£1,695 + VAT, monthly updates
The full history plus updated values as each period closes, delivered by email — and we supply the percentage change and CAGR figures for whatever periods you need.
Twelve-month term. It does not auto-renew — we will contact you before it expires.
The AMR All Art Index is a general information product. It is not a “benchmark” within the meaning of the UK Benchmarks Regulation or Regulation (EU) 2016/1011, is not administered under those regulations, and must not be used as a benchmark or reference for any financial instrument, financial contract or investment fund. It is not investment advice.
“AMR All Art” is a trademark of Art Market Research Developments Ltd · the index and its underlying data are the intellectual property of AMRD Ltd and are supplied under licence · published monthly since 1976.