On July 17, a joint research team from the Cheung Kong Graduate School of Business (CKGSB) and SDA Bocconi School of Management published the latest MM Art Indices — and the headline number is not the one you might expect. It is not a single price record, a blockbuster single-owner sale, or a landmark hammer at Christie's. It is something structurally more important: for the first time in several years, every major category tracked by the indices moved upward in the same auction season. Chinese art, Impressionist and Post-Impressionist works, and contemporary art all gained ground in Spring 2026. That is not coincidence; it is a signal — one serious collectors should read carefully, and selectively.
What the Indices Actually Show
The MM Art Indices are built on auction data drawn from Sotheby's, Christie's, and Phillips going back to 1873, covering transactions across New York, London, Paris, Hong Kong, Shanghai, Milan, Dubai, and beyond. They apply a repeat-sales methodology — tracking the same works as they re-enter the market over time — that strips out compositional bias and produces price return estimates with more rigour than simple average-price calculations. This is not a survey of collector sentiment; it is a quantitative read of what buyers have actually paid.
The Spring 2026 results, then, carry weight. According to the report, the MM Impressionist Art Index rebounded 15.0%, the MM Contemporary Art Index gained 10.8%, and the MM Chinese Art Price Index rose 1.7%. The simultaneous increase points to renewed confidence across major segments of the global auction market after several years of post-pandemic correction. As CKGSB Professor of Finance Jianping Mei put it: "The Spring 2026 auction season suggests that confidence is returning to parts of the global art market. At the same time, the data show that the recovery is uneven."
That second sentence is the one collectors should underline.
Where the Recovery Is Real — and Where It Isn't
The 15.0% rebound in the Impressionist index is the standout move. It is consistent with what Bank of America's spring 2026 art market analysis observed at the transaction level: price-to-estimate ratios were highest for Modern, Post-War, and Impressionist artists, demonstrating strong bidding for established names and a broader flight to quality. When buyers are uncertain, they migrate toward works with deep auction histories, stable attribution, and liquid secondary markets — all characteristics that define the canonical Impressionist canon from Monet and Renoir through to Cézanne and Pissarro. The 15% index move is not a one-season aberration; it is the quantified expression of that collector psychology.
The 10.8% gain for contemporary art is more nuanced. The Bank of America data showed that contemporary and young contemporary works made up 43% of lots offered in spring auctions — yet these categories fell below their estimates on average, a sign of softening prices within a segment that nonetheless continues to dominate supply. The volume is there; the premium conviction is not. Buyers are selecting, not sweeping. In 2025, 94% of auction transactions occurred below $1 million, with a substantial share from younger names — meaning the MM Contemporary index gain of 10.8% likely reflects appreciation concentrated in the upper tier of established contemporary names, not breadth across the category.
The Chinese art story is the most layered. The 1.7% gain in the headline MM Chinese Art Price Index sounds modest — and it is, relative to the other categories. But the context is essential: Chinese art prices fell 52.7% from their 2020 peak amid the pandemic, China's economic transition, and a global art market downturn. A 1.7% move after a 52.7% drawdown is stabilisation, not recovery — and the MM Chinese Art Sentiment Index, while improving since Autumn 2025, is only now nearing its historical average.
The Divergence Within Chinese Art
If you hold Chinese art, the sub-index breakdown is where the real intelligence sits. Within the MM Chinese Art Indices, the divergence is stark: Contemporary Art rose 18.6% and Oil Painting jumped 21.9%, while Modern Art declined 4.7% and Ink Painting fell 4.0%. The report characterises this as a selective market favouring internationally recognised and liquid categories.
That framing is precise and actionable. Chinese contemporary works — particularly those by artists with auction histories in New York, London, and Hong Kong simultaneously — and oil paintings in the Western academic tradition are attracting capital. Ink paintings and traditional modern works are not. The market is not betting on a broad Chinese art revival; it is betting on the slice of Chinese output that speaks fluently across geographies. For Western collectors with exposure to Chinese art, this is a meaningful distinction. Works by artists like Zao Wou-Ki, Sanyu, and Wu Guanzhong — whose liquidity crosses borders — are in a structurally different position than traditional guohua.
The long-run data reinforces the asymmetry. Since 2000, the MM Chinese Art Price Index has risen from a base of 1 to 6.83, equivalent to a compound annual growth rate of approximately 7.8% — compared with 3.5% for Impressionist Art and 4.8% for Contemporary Art. Chinese art is the strongest long-term performer in the index suite. The current trough may therefore represent one of the more compelling long-horizon entry points of the past decade, provided the collector focuses on the internationally liquid sub-categories.
The Broader Market Architecture
The MM indices do not exist in isolation. They land against a broader 2025–2026 market narrative that is cautiously constructive but structurally bifurcated. The Art Basel and UBS Global Art Market Report 2026 documented that global art sales increased 4% year-on-year to an estimated $59.6 billion in 2025 — the first growth year after two consecutive years of decline. Public auction sales increased by 9% in value. Within that auction rebound, the strongest growth came from the Impressionist and Post-Impressionist sector, where sales surged 47% year-on-year, and the Old Masters market expanded 30% to just under $1.2 billion.
The pattern is consistent across every data source available this season: the recovery is being led by established, historically legible work. Single-owner collections have been the primary engine — in 2025, single-owner collections helped lift global totals at Christie's, Sotheby's, and Phillips to $4.55 billion, an 11.1% increase from 2024 and the first growth year since 2022. But that rebound was heavily weighted toward lots priced above $10 million. For collectors operating in the mid-market — the $500,000 to $5 million range — supply has been inconsistent and competitive bidding patchy.
One segment that the data quietly flags as undervalued: classic photography. Auction data comparing the top 50 photography artists from 2017–2020 versus 2023 to present shows that many of the biggest names — from Walker Evans and Alfred Stieglitz to László Moholy-Nagy and Paul Strand — have average prices more than 40% below pre-Covid levels. For collectors who accept that the investment thesis for photographs is long-dated, this dislocation is historically unusual.
What Collectors Should Do With This Information
Synchronized recoveries across major art market categories are rare. They typically signal a turning point — not necessarily a sharp bull run, but the end of the correction phase and the beginning of a period where holding good work is rewarded. The MM data, corroborated by the Art Basel/UBS report and the Bank of America spring analysis, suggests that inflection is now underway.
Three positioning implications follow:
- Impressionist and Post-War works with strong provenance: The 15% index rebound and the flight-to-quality bidding patterns documented across spring 2026 make this the most consensus-validated segment right now. Works with clean auction histories, no restitution complications, and institutional-exhibition provenance should be treated as core positions. The window to acquire before renewed competition compresses spreads may be shorter than it appears.
- Selective Chinese contemporary and oil painting: The 18.6%–21.9% sub-index gains within Chinese art, against a backdrop of still-depressed headline prices and a long-run 7.8% CAGR, make internationally liquid Chinese works the highest-conviction contrarian thesis in the data. Prioritise artists with dual-market auction histories and works that have cleared compliance review in Western jurisdictions.
- Classic photography as a long position: The 40%-plus price discount relative to pre-2020 levels for canonical photographers — Stieglitz, Strand, Weston, Evans — represents the kind of dislocation that is straightforwardly identifiable but rarely acted on during periods of recovery enthusiasm. Condition and edition size matter acutely; focus on vintage prints and documented provenance.
The synchronized recovery does not mean the market is uniformly strong. Small and mid-tier galleries offering emerging work remain under structural pressure, and the data are explicit that contemporary works as a category are still clearing below estimate. The recovery, as Professor Mei noted, is uneven. That unevenness is precisely where the collector opportunity lies — not in chasing the categories that have already moved, but in identifying what the market's current flight to quality has left behind.
"The MM Art Indices bring much-needed transparency to a market that has traditionally lacked standardized benchmarks." — Brunella Bruno, Professor of Finance, SDA Bocconi
For collectors who read quantitative art market research the way equity investors read earnings data, Spring 2026 is a meaningful data release. The indices say the correction is ending. They also say that where you are positioned within that recovery will matter more than whether you are in the market at all.