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 MonitorLondon Imp-Mod Auction Analysis: A Picker’s MarketRussian Collectors Not Yet Ready to Surrender Best WorksKaws and Ossorio Score at AuctionA Billion Worth of CharmVilla Grisebach’s Fall Auction Total €21mChristie's London I/M Eve. Sale = £61.88m