State Street Investment Management, the asset management arm of State Street Corporation (NYSE: STT), announced the launch of the State Street SPDR Portfolio Ultra Short T-Bill ETF (SPTU) on October 8, 2025. The new fund expands the firm’s low-cost SPDR Portfolio ETF Suite, providing investors with exposure to U.S. Treasury bills maturing between one and twelve months at an expense ratio of just 0.05%—making it one of the lowest-cost ETFs in its category.

SPTU tracks the ICE BofA U.S. Treasury Bill Index and gives investors a way to manage liquidity or short-term cash while capturing yields at the ultra-short end of the curve. The ETF is also designed to qualify as a permitted investment and margin collateral under CFTC Regulation 1.25, enabling its use by derivatives market participants, including futures commission merchants (FCMs) and clearing organizations (DCOs).

Anna Paglia, Chief Business Officer at State Street Investment Management, said the fund provides a flexible, low-cost option to help clients manage income generation, liquidity, and risk, and may serve as an efficient collateral tool for institutional investors.

With the addition of SPTU, State Street’s SPDR Portfolio U.S. Treasury lineup now covers the entire yield curve — from short-term (SPTS) to long-term (SPTL) Treasurys — and includes more than $323 billion in assets across its low-cost ETF family. State Street Investment Management oversees over $5 trillion in assets globally, offering index, ETF, and fixed-income products to institutional and retail investors in more than 60 countries.