The owners of the Standard & Poor's Indices and the Dow Jones Indices said they will create a joint venture in index services. McGraw-Hill Companies, the owner of the S&P Indices, and CME Group, which owns 90 percent of the existing CME Group/Dow Jones index venture, said they will combine their indices into a new index business. The new business, to be called S&P/Dow Jones Indices, will include both the S&P Indices business of McGraw-Hill and the Dow Jones Indexes business of CME Group and Dow Jones, a unit of News Corporation. McGraw-Hill will own 73 percent of S&P/Dow Jones Indices, CME Group will own 24.4 percent through its affiliates, and Dow Jones will own 2.6 percent. S&P/Dow Jones Indices is expected to be operational in the first half of 2012, subject to regulatory approval and customary closing conditions.