State Street's reserve fund for stablecoin issuers.

A stablecoin is a digital token meant to hold a steady value, usually one US dollar, backed by real assets the issuer sets aside. On June 16, State Street launched a money market fund to hold those reserves. It buys only short-term US Treasuries and overnight loans secured by them, the assets the 2025 GENIUS Act names as acceptable backing.

What matters is where the dollars sit. A stablecoin is only as sound as what stands behind each token. If the reserves are hard to sell or verify, the peg holds until enough people redeem at once. Treasuries that mature in 93 days or less are meant to be sold fast without loss.

State Street is the fourth large manager to offer one of these, after BlackRock, Goldman, and Fidelity. The token on-chain is the visible part. Whether a dollar comes back depends on the quality and custody of the reserve behind it.