Invesco PureBeta MSCI USA Small Cap ETF (PowerShares PureBeta MSCI USA Small Cap Portfolio) 

The fund generally will invest at least 90% of its total assets in the securities that comprise the underlying index. Strictly in accordance with its guidelines and mandated procedures, MSCI Inc. (the "index provider") compiles, maintains and calculates the underlying index, which is designed to measure the performance of the small-capitalization segment of the U.S. equity market.