The Yorkshireman's 1970s Californian scene, Portrait of an Artist, sold on the nose at $80m at Christie's in New York last night

Guarantees can be lucrative, but in the face of savvy competition, novices can get burnt when backing works as a third-party

New York auction topped by Monet's Le bassin aux nymphaés, sold to an Asian buyer at $31.8m

The “snake jug” shattered the previous record for Anna Pottery, a niche favourite of Americana collectors

Two-day auction will include works by Picasso, Matisse, Egon Schiele, collected by Bernd Schultz over six decades

The 20-lot sale spans the auction house's New York and London locations and includes works ranging from Old Master paintings to a Monet

Pair of portraits by Frans Hals expected to lead two-day sale of collection of Dutch entrepreneur, who was advised by the dealer Robert Noortman

Auction house sold the painting by Emma Sandys for £62,500 earlier this year, but now 19th century work is caught up in a legal battle

Middle Eastern and South Asian works owned by embattled Dubai-based private equity firm carry much lower estimates than prices paid a decade ago

Today, art history is increasingly being written by dealers and auctioneers to suit their own purpose

Just when we thought Frieze week was all over, twists and turns provide high drama at Sotheby’s contemporary evening sale on Friday night

Francis Bacon's lighter depiction of George Dyer leads auction at £17.5m, with strong prices for Hurvin Anderson, Bridget Riley and Albert Oehlen

Fair focuses on women but market still favours men

Move follows a record-breaking breaking year for Paris auctions in 2017

No buyer's premium and bidding paddles on your phone, but founder still believes holding physical auctions is key

Stringent cultural heritage laws and bureaucracy are making consignments much harder to find

Just two paintings significantly damaged the auction house's bottom line in the second quarter

Book provides a sampling of personalities, acquisition strategies and collections that many Europeans may not know

Rockefeller auction plus leap in private and online sales drive 26% increase

A “purr-fect” ending to the story of the missing pottery object found in the collection of the artist’s secret granddaughter

Tacca's Hercules is star of the bronzes, while Carracci's military portrait and Rembrandt's print find favour where Rubens's daughter flounders in £31.1m sale

No big hitters, but overall quality and new buyers from Asia and Latin America buoyed £42.6m auction, with £5.3m record for Canova set in day sale

Veteran Old Master dealer will join the auction house in New York at the end of the summer, months after selling his inventory there

Bronze and marble take centre stage during Old Masters sales week, although Dresden Mars returns home without going on the block at Sotheby's

Christie’s introduces day sale format and established names give way to new talent

Artist was 80 years old when he began the painting of a former Tate cataloguer

The Romanian painter’s prices have increased 160-fold over the past decade. But who, or what, is behind this steep rise?

Sotheby's sale fell below estimate while Christie’s provided some cheer, showing there is still money in Monet – but only the right one

Anny Shaw asks if auction houses and dealers should pay their dues to the artists from whom they profit

Object was returned to consigner not museum from where it was looted at the end of Second World War