AI Art Valuations

I am hardly alone among appraisers to be blistering over Daniel Cassady’s article published in ARTnews last week, initially titled “AI Art Valuations Are Starting to Give Some Market Players an Edge,” then quietly subsequently changed on the website to “AI Art Valuation Companies Think They Can Give Market Players an Edge.” [NB: Notwithstanding the title change, almost all of the article remains intact, and the initial title is unchanged on the magazine’s Instagram account.]

It is extremely problematic to peer into our profession, as Mr. Cassady does, and blithely suggest that certain appraisers have an “edge” over others, and further, that appraisers using AI can “appraise works more quickly and accurately than ever before.” Mr. Cassady offers no grounding for such sweeping claims about the relative speed or accuracy with which we do our jobs. Instead, he relies on unsubstantiated testimonials from a small group of tech-forward actors who appear to be advocating for their own business interests.

To the tech-as-panacea crowd, there is seemingly always an innovation to be hailed as transformative, but art appraisal relies on real—not artificial—intelligence, diverse lived experience in the art world, networks of relationships in an array of allied professions, and a large body of knowledge cultivated over time.

In addressing the use of technology in appraisal, Mr. Cassady should offer concrete examples of how, if at all, the blockchain, AI, or other technology can meaningfully augment appraisal. He should also address the major limitations of technology in a field in which individual expertise is critical. Mr. Cassady does his readers a disservice by failing to include commentary from relevant professionals who feel that the above-mentioned technology does not meaningfully augment apprasial, and may be a superfluous business cost.

The most egregious issue in the article is, in my view, Mr. Cassady’s uncritical use of unreliable sources, above all, appraiser Carolyn Taylor. Mr. Cassady writes: “Along the way, I became an appraiser and was shocked at how that industry ran,” Taylor told ARTnews. “After a few years, it became very clear there were no neutral appraisers. Every appraisal firm is also a dealer.”

Ms. Taylor is also a member of the Appraisers Association of America. As such, she must be compliant with the current (2024) edition of the Uniform Standards of Professional Appraisal Practice (USPAP), which states in its “Definitions” section that an appraiser is “one who is expected to perform valuation services competently and in a manner that is independent, impartial, and objective” (p. 3). The language of neutrality is found throughout USPAP. The “Conduct” section of the Ethics Rule of USPAP reiterates that an appraiser “must perform assignments with impartiality, objectivity, and independence, and without accommodation of personal interests” (p. 9).

It is not only wrong but frankly unprofessional for Ms. Taylor to assert that there are “no neutral appraisers,” when, in fact, all serious professional appraisers in this country, herself included, have in essence, taken a vow of neutrality with respect to the works they are appraising, by complying with USPAP.

An appraiser may indeed have commercial interest in works not being appraised at the time. Many professional appraisers also work in an advisory capacity, acting in the interests of their clients for purchases and/or sales; these assignments, when undertaken properly, do not compromise the appraiser’s “neutrality,” nor do they necessarily make these parties “dealers.” It should be noted, further, that many appraisers do not work in an advisory capacity, nor as private dealers.

Mr. Cassady errs again when he uncritically cites Taylor a second time: “Appraisal Bureau’s neutrality has fostered strong relationships with galleries, according to Taylor, who are more willing to share data with a company not involved in sales.” 

 Mr. Cassady offers no evidence to support this statement, nor is the assertion balanced with comments from appraisers whose experience proves otherwise. I, for example, routinely work with my professional gallery contacts – or make new ones – to learn about relevant private sales, as necessary, to give credible, accurate valuations. The fact that I also assist clients in an advisory capacity for other works does not impact my neutrality as an appraiser, nor does it compromise my ability to secure the necessary data for an assignment.

Appraisal Bureau’s claimed “neutrality” is not in fact a point of difference in a profession in which all reputable appraisers have vowed impartiality, and to suggest as such, is misleading. Mr. Cassady should have further researched this matter before using a source who apparently distorted the truth to promote her own business in a quotation.

As for the larger question of the use of AI in art appraisal, I have much more to say about the severe limitations of its applicability. More to come on this topic.

Basquiat, "Portrait of the Artist as a Young Derelict" at Sotheby's London

Basquiat’s Portrait of the Artist as a Young Derelict will be offered in Sotheby’s Evening Sale in London on Tuesday, June 25, estimated at £15-20 million (approx. $19 - 25 million), with a third-party guaruntee.

Although I usually appreciate ARTnews for its comparatively straightforward coverage of the art market (relative to other major publications), Daniel Cassady premised his article about this offering, “Basquiat Triptych to Sell at Sotheby’s London for Half Its Price from Two Years Ago”, on an inaccuracy.

Cassady notes that the painting was offered at Christie’s in 2022 with a $30 million estimate. However, he cites the present estimate as 15-20 million USD (NOT GBP, as it should be). Today’s GBP-to-USD currency conversion is 1.27, so his numbers were off by a lot. Sotheby’s low estimate is nearly two thirds, not half the previous estimate, and it certainly may sell above this guaranteed price.

Most works that are withdrawn or bought-in and then offered for public sale again just two years later would be unlikely to carry low estimates that are much higher than 2/3 of the previous unmet estimate. Not even Basquiat is immune from the strong drive among collectors to buy what's fresh to market — and to expect to pay much less for what is not.

Furthermore, a repeat sale which is guaranteed to fetch nearly two thirds of an overconfident estimate from just two years prior does not necessarily reflect what Cassady refers to as a “dip in prices.”

To express this point, Cassady cites the sale of Basquiat’s Untitled (ELMAR) at Phillips, New York last month for $46.5 million against an estimate (on request) of $60 million — but is this a dip? One must keep in mind that this price was far higher than any other auction price realized for a Basquiat containing Xerox collage.

Also this season, The Italian Version of Popeye has no Pork in his Diet (1982) sold for $32 million at Christie’s NY, slightly above its EOR of $30 million, and Sotheby's eclipsed the record for a Basquiat/ Warhol collaboration with the sale of an untitled 1984 painting for $19.3 million. And Kenny Schachter reported that Ken Griffin bought the Basquiat from Maezawa for $200 million this year, turning a profit of nearly $90M in just seven years.

Jean-Michel Basquiat, Portrait of the Artist as a Young Derelict, 1982, oil, oil stick, and acrylic on wood and metal, 80 x 82 inches



Matthew Wong, Shangri-La

Auction buy-ins (lots that fail to sell) are often used as convenient yardsticks for measuring market health (or lack thereof). While this metric has certain utility, buy-ins must be understood in their specific context.

For example, Matthew Wong’s “Shangri-La” failed to sell at Christie’s, Hong Kong in the May 2024 Evening Sale, when offered with an estimate of of HKD 42,000,000 - 62,000,000 ($5,376,798 - $7,937,178). This low estimate was higher than all but one hammer prices ever realized for Wong.

Perhaps even more notable was the fact that the low estimate was nearly $1 million (US) higher than the realized price (with buyer’s premium) of $4,470,000 for this painting at Christie’s, New York, just three and a half years earlier; that price was over six times its high estimate of $700,000.

Repeat sales in short succession typically carry more cautious estimates than this — even in robust markets. The wisdom of such a practice may be all the more apparent when a successive offering follows meteoric growth, as was the case for Wong.

“Shangri-La” is a visually distinctive, yet stylistically highly characteristic, and undoubtedly attractive painting. It was simply not fresh to the eyes of prospective collectors. Perhaps a more timid estimate would have been irresistible to some, and this might have ultimately proved to yield a sale.

My takeaway is that one might not extrapolate too much about larger trends from certain examples without analyzing the specificities of the sale.

Matthew Wong, Shangri-La, 2017, oil on canvas, 96 x 72 inches