Strategy. 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 U.S.-listed companies focused on building technologies or products that enable the generation of clean energy, such as solar, wind, geothermal, hydrogen, and hydroelectric. The Index includes U.S. and non-U.S. countries. The index provider uses a natural language processing algorithm to identify companies that fall into one or more of the following categories: (1) Technologies (hardware, software, or materials) used for clean energy capture, including solar modules, wind blades and turbines, inverters, etc., (2) Technologies used for green hydrogen production and energy generation, including electrolyzers and stationary fuel cells, (3) Installation of these … Show more… 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 U.S.-listed companies focused on building technologies or products that enable the generation of clean energy, such as solar, wind, geothermal, hydrogen, and hydroelectric. The Index includes U.S. and non-U.S. countries. The index provider uses a natural language processing algorithm to identify companies that fall into one or more of the following categories: (1) Technologies (hardware, software, or materials) used for clean energy capture, including solar modules, wind blades and turbines, inverters, etc., (2) Technologies used for green hydrogen production and energy generation, including electrolyzers and stationary fuel cells, (3) Installation of these technologies for use in residential or commercial applications, and (4) Advanced energy storage devices, such as utility-scale batteries. The index provider determines whether a company falls into those categories by using an automated scan of certain recent company-issued filings with securities regulators in search of terms and phrases that describe a company as producing products or services related to clean energy technology. The index provider then reviews each company to verify that the rules of the automated scan were implemented correctly. For purposes of determining Index weight, companies are classified as either core or non-core. Core companies are those where a significant portion of business operations are involved in products and services related to clean energy technology. All other selected companies are classified as non-core. The companies in each category are initially equal-weighted, but core companies are then given a higher weighting than non-core companies. The Indexs composition and the assigned weights are reevaluated every May, with an additional weight adjustment occurring in November. The Index is constructed and maintained by S&P Dow Jones Indices LLC. More information about the Index can be found using the Bloomberg ticker symbol KCLEANN. Under normal circumstances, the Fund will invest at least 80% of its total assets in components of the Index or in instruments with similar economic characteristics. The Fund will invest principally in the financial instruments listed below. ? Equity Securities Common stock issued by public companies. ? Depositary Receipts The Fund may invest in depositary receipts, which principally include: ? American Depositary Receipts (ADRs), which represent the right to receive securities of foreign issuers deposited in a bank or trust company and are an alternative to purchasing the underlying securities in their national markets and currencies. ProShare Advisors uses a mathematical approach to investing in which it determines the type, quantity and mix of investment positions that it believes, in combination, the Fund should hold to produce returns consistent with its investment objective. The Fund seeks to remain fully invested at all times in financial instruments that, in combination, provide exposure consistent with the investment objective, without regard to market conditions, trends or direction. The Fund will generally use a replication strategy to achieve its investment objective, meaning that it will invest in all of the component securities of the Index in approximately the same proportion as the Index. However, the Fund may also use a representative sampling strategy to invest in or gain exposure to only a representative sample of the securities in the Index or to securities not contained in the Index or in financial instruments, with the intent of obtaining exposure with aggregate characteristics similar to those of the Index. For example, the Fund may utilize a representative sampling strategy when the Advisor believes a replication strategy might be detrimental or disadvantageous to shareholders, such as when buying each security in an Index is impracticable or inefficient, or when there are practical difficulties or additional costs involved in replicating an Index. The Fund also may use representative sampling if the Advisor believes one or more securities in the Index becomes illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations (such as tax diversification requirements) that apply to the Fund. Please see Investment Objectives, Principal Investment Strategies and Related Risks in the Funds Prospectus for additional details. Show less