When Sotheby’s and Christie’s Diverged in Contemporary Evening Sales May 15, 2014 by Marion Maneker ArtTactic has a convenient chart to see where the two auction houses began to diverge in the crucial Contemporary Art category. It all began in 2010 but accelerated in 2013. More from Art Market MonitorSotheby’s to Sell Items from Northumberland CollectionWarhol Kennedy Joins National Portrait GalleryUNTITLED Art Fair Tests Digital Engagement, Draws Buyers with New Virtual Reality FormatLA Bears Up for Its Art FairsTate's Hedge Fund LossesUnveiling Abu Dhabi