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24 October 2026 · Updated at 07:47 GMT FR EN ES Member area Log in
Market

Global index

The OIMAP global index tracks changes in art market prices at constant quality, every month, since 2015.

Updated : October 28, 2026· 3 min read

Pages in this section

Portrait of Gianfrancesco Gonzaga di Ròdigo, 1443–1496, Lord of Sabbionetta (reverse), Antico (1479)Monthly trendThe curve of the OIMAP global index month by month in 2024, with the events that moved it.› View of Venice, Jacopo de' Barbari (1500)By segmentThe global index broken down into five segments: painting, contemporary art, sculpture, furniture and tribal art.› Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748)By regionThe global index broken down into five regions: North America, Europe, Asia-Pacific, Middle East, Africa and Latin America.›

A thermometer of the market

Stater: BODVOC on plain field (obverse); Horse, Wheel, and Crescent (reverse) (10 BCE–20 CE)
Stater: BODVOC on plain field (obverse); Horse, Wheel, and Crescent (reverse) (10 BCE–20 CE)

The OIMAP global index stands at 163.4 at the end of 2024, against 154.4 a year earlier: prices rose by 5.8% at constant quality.

The index measures the change in the price level, not that in the volume of sales. It compares identical works sold several times, which prevents an exceptional sale from distorting the reading.

Three pages detail the series: the monthly trend, the breakdown by segment and that by region.

  • Base 100
  • Monthly
  • Constant quality

The index in figures

163.4Value at end 2024
+5.8%Change over 2024
+63.4%Since January 2015
41,800Sale pairs

Base 100 in January 2015.

Three readings of the index

Dune Scene with Peasant Figures, Willem van de Velde (mid-1650s)TimeMonthly trend

The curve month by month, with the highlights of 2024.

›Yokkaichi: View of the Mie River, from the series The Fifty-Three Stations of the Tōkaidō, Utagawa Hiroshige (c. 1833–34)SegmentsBy segment

Painting, contemporary, sculpture, furniture, tribal art.

›Seven Jeweled Mountain (late 1800s)GeographyBy region

Five regions, from the most mature market to the most dynamic.

›

How the index is built

Each time a work is resold, the difference between its two successive prices is recorded. By aggregating tens of thousands of pairs, the Observatory calculates the average price change, weighted by the weight of each segment.

Prices are adjusted for fees and exchange rates. Works whose condition or attribution changed between two sales are excluded from the calculation.

Guinea: Anne (obverse); Shields and rose (reverse) (1703)
Guinea: Anne (obverse); Shields and rose (reverse) (1703)
Arrival of the "Southern Barbarians" (c. 1600)
Arrival of the "Southern Barbarians" (c. 1600)
Christ Driving the Money Changers from the Temple, Rembrandt van Rijn (1635)
Christ Driving the Money Changers from the Temple, Rembrandt van Rijn (1635)

From price to index point

  1. Collection

    Declaration of sales by approved operators.

  2. Matching

    Identification of resold works through the OIMAP number.

  3. Adjustment

    Removal of fees, conversion into constant euros.

  4. Weighting

    Application of the weight of each segment.

  5. Publication

    Published on the tenth working day of the month.

Index change 2024 by segment

Tribal art+9.4%
Contemporary art+8.7%
Sculpture+5.2%
Painting+4.9%
Furniture and other+3.1%

Annual change, December 2023 to December 2024.

Index landmarks

Landmarks
DateValueComment
January 2015100.0Base of the index
December 2019128.7Before the health crisis
December 2020121.3Low point
December 2023154.4Return to growth
December 2024163.4All-time high

End-of-period values.

The stages of the index

  1. Creation

    First publication, base 100.

  2. Weighting by segment

    Taking into account the weight of each segment.

  3. Exchange-rate-adjusted index

    Neutralisation of exchange-rate effects.

  4. Regional index

    Publication by region.

  5. Matching by OIMAP number

    Making repeat sales more reliable.

What the index does not say

Global index or sector index

Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748)

Global index

All segments, all regions
  • Overview
  • More stable
  • Weighted by the weight of the segment

To follow the general trend.

Solidus with Busts of Constans II and Constantine IV (obverse) (659–661)

Sector index

A segment or a region
  • More precise
  • More volatile
  • Fewer sale pairs

To analyse a particular market.

Creamer, Louis Rorimer (c. 1910)
Creamer, Louis Rorimer (c. 1910)
Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748)
Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748)
Portrait of Pope Paul II Barbo (obverse) and (reverse), Cristoforo di Geremia (c. 1468)
Portrait of Pope Paul II Barbo (obverse) and (reverse), Cristoforo di Geremia (c. 1468)

Reading the index well

A point of method

Plate: Diana and Acteon, Maestro Giorgio Andreoli (1522)
« An index's strength lies less in its precision than in its constancy: it must measure the same thing from one year to the next. »
Dr. Camille Roussel, Director of the Observatory

Vocabulary of the index

Base 100
Reference value set at the starting point of the series.
Constant quality
Comparison of identical works over time.
Weighting
Weight given to each segment in the calculation.
Margin of error
Interval within which the true value lies.

Frequently asked questions

How often is the index published?

Every month, on the tenth working day.

Is the index revised?

The last three months may be revised slightly when new declarations arrive.

Can I download the series?

Yes, in the databases.

What is the margin of error?

It is ±0.6 points on the global index, more on the sector indices.

Useful documents

Contacts

The Pyramid of Cestius, Rome, Michiel van Overbeek (c. 1650–80)
The Pyramid of Cestius, Rome, Michiel van Overbeek (c. 1650–80)
OIMAP ObservatoryParis — Headquarters+33 1 00 00 01 00observatoire@oimap.exampleMonday to Friday, 9 am – 5 pm

Going further

Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748)

Consult the monthly curve of the index in 2024.

See the monthly trend
Image credits (22)
  • Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748) — Cleveland Museum of Art, CC0 1.0
  • Portrait of Gianfrancesco Gonzaga di Ròdigo, 1443–1496, Lord of Sabbionetta (reverse), Antico (1479) — Cleveland Museum of Art, CC0 1.0
  • View of Venice, Jacopo de' Barbari (1500) — Cleveland Museum of Art, CC0 1.0
  • Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748) — Cleveland Museum of Art, CC0 1.0
  • Stater: BODVOC on plain field (obverse); Horse, Wheel, and Crescent (reverse) (10 BCE–20 CE) — Cleveland Museum of Art, CC0 1.0
  • Dune Scene with Peasant Figures, Willem van de Velde (mid-1650s) — Cleveland Museum of Art, CC0 1.0
  • Yokkaichi: View of the Mie River, from the series The Fifty-Three Stations of the Tōkaidō, Utagawa Hiroshige (c. 1833–34) — Cleveland Museum of Art, CC0 1.0
  • Seven Jeweled Mountain (late 1800s) — Cleveland Museum of Art, CC0 1.0
  • Guinea: Anne (obverse); Shields and rose (reverse) (1703) — Cleveland Museum of Art, CC0 1.0
  • Arrival of the "Southern Barbarians" (c. 1600) — Cleveland Museum of Art, CC0 1.0
  • Christ Driving the Money Changers from the Temple, Rembrandt van Rijn (1635) — Cleveland Museum of Art, CC0 1.0
  • Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748) — Cleveland Museum of Art, CC0 1.0
  • Solidus with Busts of Constans II and Constantine IV (obverse) (659–661) — Cleveland Museum of Art, CC0 1.0
  • Creamer, Louis Rorimer (c. 1910) — Cleveland Museum of Art, CC0 1.0
  • Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748) — Cleveland Museum of Art, CC0 1.0
  • Portrait of Pope Paul II Barbo (obverse) and (reverse), Cristoforo di Geremia (c. 1468) — Cleveland Museum of Art, CC0 1.0
  • Plate: Diana and Acteon, Maestro Giorgio Andreoli (1522) — Cleveland Museum of Art, CC0 1.0
  • The Pyramid of Cestius, Rome, Michiel van Overbeek (c. 1650–80) — Cleveland Museum of Art, CC0 1.0
  • Medal Commemorating Commodore Oliver Hazard Perry (1785-1819) and the Battle of Lake Erie, Moritz Fürst (1813) — Cleveland Museum of Art, CC0 1.0
  • An Indigo Factory, Allahabad, Louis-Théophile Marie Rousselet (1865–68, published 1869–70) — Cleveland Museum of Art, CC0 1.0
  • Sweet Melancholy, Joseph-Marie Vien (1756) — Cleveland Museum of Art, CC0 1.0
  • Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748) — Cleveland Museum of Art, CC0 1.0
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