Source: Wall Street Journal                         Date: 29 September, 2011

Rio Tinto increased its interest in Ivanhoe Mines to 49 percent, the maximum limit agreed upon by the two firms. Rio bought CAD 73.1 million via Credit Suisse to gain the extra half percentage point needed.Last December Ivanhoe established a standstill agreement that prohibited Rio from purchasing more than 49 percent of its stock, but granted Rio operating control over the Oyu Tolgoi copper and gold project. The standstill agreement is set to expire on January 18, 2012.  Ivanhoe holds a 66 percent stake in Oyu Tolgoi while Rio has indirect ownership through its Ivanhoe stake.Rio has steadily increased its interest on Ivanhoe from 19.7 percent at the start of the year. An outcome of the arbitration between Rio and Ivanhoe is expected for the near future.Oyu Tolgoi is the world largest untapped copper deposit located 80 kilometers north from China.