The Dow Jones Brookfield Oil & Gas Storage & Transportation Infrastructure Index is a global index that is designed to measure the performance of pure-play infrastructure companies in the oil & gas storage & transportation sector. To be included in the index, a company must derive at least 70% of cash flows from infrastructure lines of business and at least 50% of cash flows from the development, ownership, lease, concession, or management of oil and gas (and other bulk liquid products) fixed transportation or storage assets and related midstream energy services. The index is a subset of the Dow Jones Brookfield Global Infrastructure Index.