Our pick of items from auctions and fairs around the world over the next fortnight

The London-based collector Davinder Toor holds one of the most significant collections of Sikh works in the US and the UK

The first rule of art fairs is don't talk about auctions—but sometimes they can benefit artists and their dealers

Ethics specialist Piergiorgio Pepe claims the power in the art industry is still held in the hands of a few

Barnes Foundation’s sale of founder’s items follows nominal payment for lease of valuable land

Our pick of highlights for sale over the next fortnight

Around 18,000 people invested in the now bankrupted company's manuscripts collection, but state says many items of historical importance should never have been sold

The auction house cites increasing interest in Aboriginal art among US collectors and institutions

Christie's American art sales this week realise a new record for Hartley but Sotheby's struggles to get the pricing right on Hopper's Shakespeare scene

After the San Francisco Museum of Modern Art's sale of its Rothko, we discuss the principles that guide deaccessioning in the US and speak to activists about the Whitney vice-chairman's problematic link to a weapons manufacturer

Dana Schutz’s record broken twice in one night at Phillips then Sotheby's, while the bidder behind the $91m Koons Rabbit buys Lee Krasner painting for $10m

Post-war and contemporary sale in New York also produced a big sale for Robert Rauschenberg and new records for Louise Bourgeois and Jonas Wood

Market is alive and kicking at the top for prime Impressionist works, though Bouguereau's uncomfortably placed, 19th-century Bacchanalian scene failed to sell

Fresh material from big collections led the $399m New York auction, while mid-tier Monets primed the market for his $55m haystacks work at Sotheby's tonight

Christie’s values the Japanese-influenced picture of the asylum garden at $25m

Our pick of highlights from upcoming auctions

Our picks from upcoming fairs and auctions in the next fortnight

The curator’s attribution to the Renaissance master helped Christie’s achieve a world record price for the painting

Our picks from upcoming fairs and auctions in the next fortnight

Settlement came day before trial was due to start, but its suit against financier will continue

The latest Art Basel and UBS report makes for uncomfortable reading

The acquisition will make public 4,000 international auction house sale records

Online-only auctions may focus on the lower end of the market, but they are key to expanding clientele. We survey ten auction houses to find out their strategy

Overall results are down 42.7% on last year, but European buying remains strong despite Brexit

Art Fund raises concerns about consignment of 152 works to auction by Hertfordshire County Council

£63m auction total is half that of last year, but bidding from Asia and Russia helps make new record for Oskar Schlemmer and a Venetian view by Monet

Our highlights from upcoming fairs and auctions

Proceeds would go toward acquisitions that “address art historical gaps’’

Twenty-six of the seized works were to be auctioned at Auktionshaus Weidler tomorrow

Sculpture of Peter Pan and painting by Gluck were among the stars of five-hour long auction