The Invesco Dorsey Wright Energy Momentum ETF (Fund) is based on the Dorsey Wright Energy Technical Leaders Index (Index). The Fund will normally invest at least 90% of its total assets in the securities that comprise the Index. The Index is designed to identify companies that are showing relative strength (momentum), and is composed of at least 30 securities from the NASDAQ US Benchmark Index. Relative strength is the measurement of a security's performance in a given universe over time as compared to the performance of all other securities in that universe. The Fund and the Index are rebalanced and reconstituted quarterly.