Money funds, not stablecoins, drove $550B Treasury-bill surge
In brief
- Money funds absorbed ~85% of $550 billion net bill increase in July-August
- Stablecoin reserves total ~$200 billion in US Treasury holdings
- Circle's USDC keeps 84% of reserves in government money-market fund
- Fed purchased over $300 billion in bills through reserve operations
- Stablecoins could become larger Treasury demand source as regulation develops
Money funds led the charge
Money-market mutual funds absorbed approximately 85% of the US government's latest Treasury-bill surge, giving traditional cash managers the clearest claim to the marginal demand behind the summer issuance wave. The Treasury's estimate applies specifically to the additional bills issued during July and August, not the entire bill market. Net bill supply grew by more than $550 billion during that two-month period, an increase of roughly 8%.
The Federal Reserve also played a material role. The Fed purchased more than $300 billion in Treasury bills through reserve-management purchases and reinvestment of principal payments from agency securities.
Stablecoins' hidden role
Stablecoin reserves may be invested through government money-market funds and repurchase agreements, which means some stablecoin demand appears within the money-fund category itself. Circle disclosed that approximately 84% of USDC reserves were held in the Circle Reserve Fund at June 30. The company describes the vehicle as a Rule 2a-7 government money-market fund.
This structure means USDC reserve demand can appear inside the money-fund category, making the true stablecoin contribution to Treasury demand harder to isolate from the headline 85% figure. Stablecoins are already material Treasury-linked investors and could become a larger source of demand as regulation takes shape.
Total stablecoin holdings sit at nearly $200 billion in US government debt.
Frequently asked questions
Why do stablecoin holdings appear in money-fund data?
Stablecoin reserves are invested through government money-market funds and repurchase agreements. Circle, for example, holds 84% of USDC reserves in a Rule 2a-7 government money-market fund, so stablecoin demand gets counted within the broader money-fund category rather than separately.
Could stablecoins become bigger Treasury buyers in the future?
Yes. Stablecoin providers are already material holders of short-dated government debt and could become a larger source of demand as regulation takes shape and the industry matures.
