Forced online due to Covid-19, this year's American Art Fair boasts more exhibitors as auction houses see new records set for late 19th century works

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

Abbott Laboratories suspects fakes found their way into its collection during conservation process

Monet carries Christie's evening sale while a Magritte shines at Sotheby's, marking an auction record for the Surrealist painter

The auction house hopes the works will surpass previous records by several million