A monitor shows the stock exchange at the Saudi Stock Exchange, or Tadawul, on June 15, 2015 in the capital Riyadh. Saudi Arabia's stock exchange allowed foreign investors to trade shares for the first time, boosting efforts by the world's top oil exporter to become a major global capital market. AFP PHOTO / FAYEZ NURELDINE        (Photo credit should read FAYEZ NURELDINE/AFP/Getty Images)