The global art market was valued at $67.4 billion in 2018, the second highest year ever. The United States, United Kingdom and China are the three largest art markets in the world. Their sales combined make up 84% of the global art market. The auction house is one of the biggest drivers of the art market. Sales at public auctions exceeded $29 billion last year. Two auction houses—Christie's and Sotheby's— compete head to head each year capturing more than 40% of global auction sales. » Subscribe to CNBC: cnb.cx/SubscribeCNBC » Subscribe to CNBC TV: cnb.cx/SubscribeCNBCtelevision » Subscribe to CNBC Classic: cnb.cx/SubscribeCNBCclassic About CNBC: From 'Wall Street' to 'Main Street' to award winning original documentaries and Reality TV series, CNBC has you covered. Experience special sneak peeks of your favorite shows, exclusive video and more. Connect with CNBC News Online Get the latest news: www.cnbc.com/ Follow CNBC on LinkedIn: cnb.cx/LinkedInCNBC Follow CNBC News on Facebook: cnb.cx/LikeCNBC Follow CNBC News on Twitter: cnb.cx/FollowCNBC Follow CNBC News on Instagram: cnb.cx/InstagramCNBC #CNBC How Two Companies Dominate The $67 Billion Art World