A group of tourists pose for photographs in front of a sculpture of a gilded bauhinia at Golden Bauhinia Square in Hong Kong, China, on Tuesday, June 18, 2013. A shortage of housing, low mortgage costs and a buying spree by mainland Chinese have led home prices to more than double since the beginning of 2009, shrugging off repeated attempts by the government to curb gains amid an outcry over affordability. Photographer: Jerome Favre/Bloomberg via Getty Images