This index is designed to track the collective performance of its constituent Master Limited Partnerships (MLPs). These MLPs are characterized by generating the vast majority of their income from specific operations within the energy commodities sector. The index's weighting methodology is capped, adjusted for publicly available shares (float-adjusted), and based on market capitalization. The approved energy-related activities that qualify include compression, gathering and processing, liquefaction, marketing, pipeline transportation, rail terminating, and the storage of various energy commodities.