YFFI invests in investment grade fixed income securities of any maturity. The fund targets corporate bonds but may hold US Treasurys, asset-backed securities, and preferred stocks perceived to offer attractive cash flow and yield. It assesses relative yield or the typical yield spread differences between bonds and the yield difference for the same company issuing both corporate debt and preferred stocks. In addition, the fund analyzes fundamental and technical data for credit rating, coupon, yield to worst, and maturity date. Weights are then assigned using these variables relative to their target company and sector exposure. The fund selects securities that maximize cash flow and yield based on current and expected market conditions and the portfolios current composition. Holdings are reviewed monthly, while the models are reviewed quarterly for possible reconstitution. However, as an actively managed ETF, the fund manager has full discretion to buy or sell securities at any time.