Sotheby's uses the Sotheby's Mei Moses database, acquired in 2016, to analyze art market performance against other asset classes by tracking price changes of the same artworks across repeated sales. This tool provides data-driven insights to collectors and internal specialists.

The Mei Moses Art Indices, renamed Sotheby's Mei Moses after acquisition, track repeat sales of over 45,000 objects in eight collecting categories, updated with approximately 4,000 new repeat sales each year. The methodology compares the investment performance of art against other asset classes and measures the impact of macroeconomic forces on the art market. It provides objective, verifiable market data to complement Sotheby's human specialists and to offer collectors analysis of overall market trends, individual artist trends, and consignment timing insights.