The Fund generally will invest at least 80 percent of its total assets in the components of the Underlying Index. Strictly in accordance with its guidelines and mandated procedures, Morningstar, Inc. (Morningstar or the Index Provider) compiles, maintains and calculates the Underlying Index, which tracks the market value weighted performance of the 100 largest institutional leveraged loans based on market weightings, spreads and interest payments. Invesco Capital Management LLC (the Adviser) and the Funds sub-adviser, Invesco Senior Secured Management, Inc. (the Sub-Adviser), define senior loans to include loans referred to as leveraged loans, bank loans and/or floating rate loans. Banks and other lending institutions generally issue senior loans to corporations, partnerships or other entities (borrowers). These borrowers operate in a variety of industries and geographic regions, including foreign countries. To be included in the Underlying Index, leveraged loans must be senior secured, denominated in U.S. dollars and must have a minimum initial term of one year and a minimum initial issue size of dollar 50 million. A leveraged loan is typically rated below investment grade quality or is unrated but deemed to be of comparable quality.