The Invesco Zacks Mid-Cap ETF (Fund) is designed to track the performance of the Zacks Mid-Cap Core Index (Index). A minimum of 90% of the Fund's total assets will be allocated to the securities comprising its underlying Index. The Index itself selects its constituents from a broad pool of mid-capitalization companies, specifically including master limited partnerships (MLPs), American depositary receipts (ADRs), and business development companies (BDCs). Both the Fund and the Index undergo rebalancing every quarter.