CBS News on Graffiti Art April 25, 2011 by Marion Maneker More from Art Market MonitorHockney’s Record-Setting Splash Painting Comes Back to Market at Sotheby’s for £20mBusinessWeek Discovers Emerging MarketsThe New Women of LondonArtcurial 1st Half 2014 = €105m ($142m)Sweet Home ChicagoThe Top of the Auction Market, 2007-2018