The Amplify CEF High Income ETF (YYY) comprises a selection of 60 closed-end funds (CEFs), whose inclusion is determined by a predefined, rule-based system rather than discretionary management. Specifically, the underlying Nasdaq CEF High Income Index meticulously evaluates and identifies CEFs that exhibit top performance across three crucial metrics: their distribution yield, the extent to which they trade below their Net Asset Value (NAV), and their market liquidity. This systematic approach ultimately constructs a diversified portfolio that incorporates a wide range of asset classes, investment methodologies, and professional fund managers.