QSIG's eligible universe includes investment grade, US-domiciled, USD denominated corporate debt, with maturities between one and five years. From this universe, the fund selects its fixed income securities by scoring companies based on their free cash flows over debt service, leverage ratios, and return on invested capital, and subsequently removing the lowest-scoring 20%. The fund weights its securities by scoring remaining bonds by their probability of default and duration, and gives preference to risk-adjusted higher income. The fundamental approach intends to identify companies with healthy balance sheets and cash flows, while tilting towards higher income. Prior to June 8, 2024, the fund tracked the WisdomTree U.S. Short-term Corporate Bond Index, and traded under the ticker SFIG.