European Investor
12 Feb 2026, 23:19
State Street Investment Management has launched the **State Street Prime Money Market ETF (MMK)**, an actively managed ETF designed to provide flexible, transparent, and cost-effective cash management.
The ETF aims to maximize current income while preserving capital and liquidity, investing in short-term, high-quality debt instruments such as U.S. government securities, certificates of deposit, commercial paper, asset-backed securities, mortgage-related securities, and repurchase agreements.
With an expense ratio of **18 basis points**, MMK is among the lowest-cost active prime money market ETFs in the U.S. As of December 31, 2025, State Street’s cash team managed approximately **$599.55 billion** in assets.
Source: Business Wire.
The ETF aims to maximize current income while preserving capital and liquidity, investing in short-term, high-quality debt instruments such as U.S. government securities, certificates of deposit, commercial paper, asset-backed securities, mortgage-related securities, and repurchase agreements.
With an expense ratio of **18 basis points**, MMK is among the lowest-cost active prime money market ETFs in the U.S. As of December 31, 2025, State Street’s cash team managed approximately **$599.55 billion** in assets.
Source: Business Wire.