The fund is an actively managed exchange-traded fund ("ETF") that invests under normal circumstances at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of small-capitalization U.S. companies. The fund's sub-adviser defines a small-capitalization company as an issuer whose market capitalization at the time of purchase is in the range of those found in the Russell 2000 Index. The fund’s equity securities primarily include common stocks, real estate investment trusts (“REITs”), and American Depositary Receipts (“ADRs”) representing the stock of a foreign company.