VUSB, Vanguards first active bond ETF, aims to invest in high quality investment-grade securities rated A3 or better, while also allocating a smaller portion of the fund in securities at the lower-end of the investment-grade spectrum. Securities that may be included are USD denominated fixed income securities, investment-grade credit and government bonds. The fund expects to maintain a dollar-weighted average maturity of 0 to 2 years. VUSB utilizes the same investment strategy and portfolio management team as its mutual fund counterpart, Vanguard Ultra-Short-Term Bond Fund.