Is State Street's SSCXX the New Standard for Stablecoin Reserves?

In brief: State Street Investment Management has launched SSCXX, a Rule 2a-7 government money market fund structured specifically to hold reserves backing dollar-denominated payment instruments under the GENIUS Act. The fund accepts anchor investment from State Street Bank and Trust Company and Anchorage Digital and positions one of the world's largest custodians directly in the reserve management business. For institutions evaluating how to issue, structure, or capitalize payment instruments at scale, the product sets a new bar for what compliant reserve infrastructure looks like.

The GENIUS Act Creates a Mandatory Reserve Architecture

The Guiding and Establishing National Innovation for U.S. Stablecoins Act, passed into law by the United States Congress in July 2025, creates a clearer regulatory framework to utilize money market funds registered under the Investment Company Act of 1940 to back the issuance of stablecoins.

That framework is not permissive - it is prescriptive. Issuers are required to hold at least one dollar of permitted reserves for every one dollar of stablecoins issued, with permitted reserves limited to coins and currency, deposits at insured banks and credit unions, short-dated Treasury bills, repurchase agreements and reverse repos backed by Treasury bills, government money market funds, central bank reserves, and any other similar government-issued asset approved by regulators.

Compliance is not simply a matter of asset selection. The GENIUS Act defines the disclosure requirements of any payment stablecoin issuer, including its redemption policy, monthly attestations of the composition of the reserves, and monthly CEO and CFO certifications of the reports. Issuers operating above the threshold face an additional layer of scrutiny: issuers with more than $50 billion in stablecoins outstanding are required to submit audited annual financial statements.

The Congressional Research Service's overview of the GENIUS Act and the Federal Reserve Bank of Richmond's analysis both confirm that the 1:1 reserve requirement, segregation of reserve assets, and prohibition on rehypothecation are binding obligations - not guidance.

State Street's Product: Structure and Participants

State Street Investment Management's fund is among the first GENIUS Act-aligned government money market funds to support stablecoin issuance at scale. It trades under the symbol SSCXX.

Operating as a registered Rule 2a-7 government money market fund, SSCXX places assets into cash holdings, short-dated U.S. Treasuries, repurchase agreements, and comparable cash equivalents - a configuration intended to deliver liquidity, preserve capital stability, and generate income for reserve holdings.

Its mandate focuses on cash, short-term U.S. Treasuries, repurchase agreements, and other cash equivalents, with objectives that fit stablecoin reserves: preserving principal, maintaining daily liquidity, and keeping a stable $1 net asset value per share.

State Street Bank and Trust Company and Anchorage Digital, home to the first federally chartered crypto bank in the United States, are initial investors in the fund. State Street Investment Management, the asset management arm of State Street Corporation, oversees more than $5 trillion in assets and ranks among the world's largest investment managers.

Why Reserve Management Is Now a Competitive Market

The reserve management business is no longer incidental to stablecoin issuance - it is the central commercial prize. The move intensifies competition among major asset managers such as BlackRock, Franklin Templeton, Fidelity, and JPMorgan to oversee the Treasury bills, cash, and money market funds that support stablecoins. With Tether and Circle already holding tens of billions of dollars