Strategy. The Fund seeks to outperform, before Fund fees and expenses, the investment results of the large- and mid-capitalization U.S. equity markets. The Fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of its net assets plus the amount of any borrowings for investment purposes in U.S. listed common stock of large- and mid-capitalization companies selected based on a proprietary Factor Rotation model developed by BFA and its affiliates. Investments in derivatives are counted toward the Funds 80% policy to the extent that they provide investment exposure to the securities included within that policy or to one or more market risk factors associated with such securities. For purposes of the Funds 80% policy, securities are … Show more… The Fund seeks to outperform, before Fund fees and expenses, the investment results of the large- and mid-capitalization U.S. equity markets. The Fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of its net assets plus the amount of any borrowings for investment purposes in U.S. listed common stock of large- and mid-capitalization companies selected based on a proprietary Factor Rotation model developed by BFA and its affiliates. Investments in derivatives are counted toward the Funds 80% policy to the extent that they provide investment exposure to the securities included within that policy or to one or more market risk factors associated with such securities. For purposes of the Funds 80% policy, securities are considered to be those of U.S. issuers where: (i) the company is domiciled in the U.S., (ii) the company is listed on a U.S. stock exchange, (iii) the companys principal operations are conducted in the U.S. or the company does a substantial amount of business in the U.S. or (iv) the issuer of securities is included in the Funds primary U.S. benchmark. The Funds 80% investment policy may be changed by the Trusts Board of Trustees (the Board) upon 60 days notice to shareholders. The eligible universe of securities that are part of the model includes U.S. listed common stock of large- and mid-capitalization companies. The proprietary model uses commonly-used equity style factors such as momentum, quality, value, growth, size and minimum volatility and dynamically allocates the factors, and seeks to emphasize those factors with the strongest near-term return prospects. The model incorporates two potential sources of return: long-term return premium and short-term returns from timing the cyclical behavior of each individual factor. The model incorporates information about the current economic cycle as well as the valuations and recent trends for each factor to compare the relative attractiveness of each factor and seeks to guide the portfolio to tilt into favorable factors and away from unfavorable factors in pursuit of incremental returns. While the Fund is actively managed, the Fund generally allocates its investments to securities based on the Factor Rotation model. The model allows for a company to be included under more than one of the equity style factors rather than being solely assigned to a single style factor. The Fund will hold common stock of those companies that fall into at least one of the equity style factors. The Fund may also invest in other securities, including but not limited to, cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates. The Fund is an actively managed ETF and does not seek to replicate the performance of a specified index and may have a higher degree of portfolio turnover than an index fund. Accordingly, the management team has discretion on a daily basis to manage the Funds portfolio in accordance with the Funds investment objective. Show less