Sotheby’s Now & Contemporary Evening Opens New York’s $600 Million Spring Auction Week on May 14 — Basquiat’s ‘Museum Security’ at $45 Million Anchors a Fortnight the Diamond District Is Already Watching

New York’s spring auction fortnight opens at Sotheby’s York Avenue on May 14 with the Now & Contemporary Evening Auction — $202.2 million in combined low estimates, $268.8 million on the high side, across a single night’s bidding. The top lot is Jean-Michel Basquiat’s Museum Security (Broadway Meltdown) from 1983, offered at a public auction for the first time in more than a decade, with an estimate in excess of $45 million.

Sotheby’s York Avenue previews are free and open through May 18. The May 14 session begins at 7:00 PM EDT. It is the first of three major evening sales across a ten-day window: Christie’s 20th Century Evening on May 18, and Sotheby’s Modern Evening on May 19 — headlined by a Picasso from the Donati collection at approximately $40 million. Combined low estimates across all three houses approach $600 million, making this the heaviest single auction period in the 2026 calendar.

Museum Security belongs to a suite of twelve large-scale works Basquiat painted in 1983 during an extended residency in Los Angeles. The closest comparator, Hollywood Africans, is permanently held by the Whitney Museum of American Art on the Upper East Side. The institutional ownership of the reference piece narrows the secondary market supply of this sub-category and concentrates collector demand on the handful of museum-quality 1983 Basquiats that remain in private hands. The Museum Security estimate prices that scarcity.

The broader sale roster runs from postwar abstraction through the contemporary blue-chip tier. Mark Rothko’s Untitled is estimated at $10–15 million. Alexander Calder’s Mobile Blanc at $5–7 million. Agnes Martin, Helen Frankenthaler, and Alma Thomas represent the color-field layer that has outperformed the wider art index in the first quarter of 2026. Andy Warhol, Keith Haring, and Kerry James Marshall anchor the contemporary tier. The composition is structured as a test of the art market’s K-shape thesis: trophy assets at the top end of each category, with mid-market works consigned at or below previous hammer.

For Manhattan’s Diamond District, the May results function as a quarterly recalibration of the signed-art-and-jewelry collateral floor. The same collector profile that uses a Basquiat or a Rothko as loan collateral also holds signed jewelry — and lenders who write against Cartier, Bulgari, or Van Cleef will update their blue-chip asset models within 48 hours of the May 14 and May 18 hammers. When the trophy art tier performs, it signals confidence across the full ultra-high-net-worth balance sheet; when it disappoints, the ripple reaches every collateral category within the same week.

The fortnight runs concurrent with Frieze New York at The Shed (May 13–17), which brings 67 international galleries to Hudson Yards and adds gallery-market pricing to the auction data set. The two calendars overlap intentionally: Frieze’s gallery sales test works before they reach the auction room, and sharp collectors use the gallery-to-auction spread as a signal for where the market’s liquidity is concentrated in a given season.

For asset-backed borrowers in Manhattan, the practical implication is straightforward: if your portfolio includes blue-chip postwar or contemporary art, the week of May 14–19 will produce the most current, most liquid pricing data available for your holdings until the fall season opens in November. Loan-to-value calculations made against Basquiat, Rothko, or Calder will be materially more accurate on the morning of May 15 than they are today.

From the Borro desk: For the national view on how the May auction fortnight fits the broader luxury asset K-shape, see Behind the Marquee: How the May 2026 Auction Calendar Actually Works.