Ford Motor Company sports car maker Aston Martin in 1989, later selling it on March 12, 2007, although retaining an 8% stake. Ford purchased Volvo Cars of Sweden in 1999, selling it to Zhejiang Geely Holding Group in 2010. In November 2008, it reduced its 33.4% controlling interest in Mazda of Japan to a 13.4% non-controlling interest. On November 18, 2010, Ford reduced their stake further to just 3%, citing the reduction of ownership would allow greater flexibility to pursue growth in emerging markets. Ford and Mazda remain strategic partners through exchanges of technological information and joint ventures, including an American joint venture
China National Coal Group limited company. The group also acquired Shanxi Huayu Energy in the same year. China United Coalbed Methane, a joint venture of China Coal Group and PetroChina, became a wholly owned subsidiary of China Coal Group also in 2009. At the same time PetroChina acquired some assets from China United Coalbed Methane. China Coal Group later sold China United Coalbed Methane to China National Offshore Oil Corporation in tranches from 2010 to 2014. China Coal Group's subsidiary, China Coal Energy, has been listed on the Hong Kong Stock Exchange since 2006 and the Shanghai Stock Exchange since 2008. China Coal Group