The investment seeks investment results that correspond generally, to the performance of its underlying index, the Janus Henderson Small/Mid Cap Growth Alpha Index. The fund pursues its investment objective by normally investing at least 80% of its net assets in the securities that comprise the underlying index. The underlying index is composed of common stocks of small- and medium-sized companies that are included in the Solactive Small/Mid Cap Index, a universe of 2,500 small- and medium-sized capitalization stocks.