The Invesco Dorsey Wright Energy Momentum ETF (PXI) is structured to track the performance of the Dorsey Wright Energy Technical Leaders Index. The Fund generally commits at least 90% of its total capital to the constituent securities of this underlying Index. The Index's primary objective is to pinpoint and include companies demonstrating robust relative strength, commonly known as momentum. It is constructed from a selection of no fewer than 30 equities originating from the NASDAQ US Benchmark Index. Relative strength is defined as the measure of a security's historical performance within a given market against that of its peer group over a specified timeframe. Both the ETF and its associated Index are subject to quarterly rebalancing and reconstitution.