The Fund invests in financial instruments that ProShare Advisors believes, in combination, should track the performance of the Index. The Index is designed to measure the performance of companies that stand to benefit from interest in or resources spent on pet ownership. The Index includes companies in at least one of eight FactSet Revere Business Industry Classification System Sub-Industries (RBICS Sub-Industries) that the index provider has identified as related to the pet ownership value chain, including pharmaceuticals, diagnostics, food and supplies manufacturers, retailers, and other pet care services providers. The eight eligible RBICS Sub-Industries are (1) internet pet and pet supply retail, (2) pet and pet supply stores, (3) pet food manufacturing, (4) pet supplies manufacturing, (5) veterinary diagnostics, (6) veterinary pharmaceuticals, (7) veterinary product distributors, and (8) veterinary services.