The fund seeks to achieve its investment objective by investing under normal circumstances at least 80% of its assets (net assets plus the amount of any borrowings made for investment purposes) in the component securities ("Component Securities") of the RAFI Multi-Factor U.S. Index (the "index"). The index provider uses a rules-based approach to construct five factor portfolios within the index. The index equally weights each of the factor portfolios into a combined portfolio of stocks that are weighted by their fundamental size (e.g., earnings, revenues, book value).