Auction Houses Clean Up as Art Gains Appeal - WSJ.com

Want to know where investors are placing some of their biggest bets? Look on their walls.

Art prices swelled last year, lifting sales at Christie's International PLC to $5.7 billion last year, up 14% from the year before. The London-based auction house said on Tuesday that the total includes $4.9 billion in auction sales and $808.6 million in art sales it brokered privately, as galleries typically do. The private-sale total doubled from a year ago, it added.