 On March 17, 2008, New York Mercantile Exchange (NYMEX) (owner of both the NYMEX exchange and the COMEX exchange) accepted an offer from CME Group, to purchase NYMEX for $8.9 billion in cash and CME Group Stock.The acquisition was formally completed on August 22, 2008, and the NYMEX systems were fully integrated by September 30, 2009.Also in 2007, NYMEX in a joint venture with partners on the Arabian Peninsula opened the Dubai Mercantile Exchange (DME).