State Street SPDR Portfolio Ultra Short T-Bill ETF (SPTU)

The State Street SPDR Portfolio Ultra Short T-Bill ETF is an exchange-traded fund from State Street Global Advisors that invests in very short-term U.S. Treasury bills. It is part of the SPDR Portfolio lineup and is designed to offer exposure to the front end of the Treasury yield curve.

Treasury bills are short-dated obligations backed by the full faith and credit of the U.S. government, so the fund's holdings carry minimal credit risk and very limited sensitivity to interest-rate changes. Its returns generally track prevailing short-term interest rates, and it is commonly used as a cash-management tool. The fund is listed on NYSE Arca.