SDFI provides exposure to the broad fixed income space while targeting short-term, income-producing securities to achieve high current income and capital preservation. These securities may include government and corporate debt, non-government mortgage-backed and other asset-backed securities, certificates of deposit, and commercial paper. It holds US and foreign bonds of any maturity but aims to maintain a dollar-weighted average portfolio duration of less than three years. At least 65% of the portfolio will be invested in investment grade securities and up to 35% may be allocated to junk bonds. The fund bases its security selection on its assessment of risks and return characteristics while employing active management. It also considers certain factors in the selection process including credit quality and sensitivity to interest rates. SDFI was converted from the AB Short Duration Income Portfolio, an open-ended mutual fund, to an ETF with $101.17 million in assets on June 10, 2024.