The investment seeks to track the performance, before fees and expenses, of the Hoya Capital Housing 100 TM Index. The index is a rules-based index composed of 100 companies that collectively represent the performance of the U.S. residential housing industry. Normally at least 80% of the fund?s net assets will be invested in real estate and housing-related companies. It will generally use a ?replication? strategy to achieve its investment objective, meaning it generally will invest in all of the component securities of the index in approximately the same proportion as in the index.