I. Current Regulatory Definitions by Jurisdiction

The debate over whether "stablecoin" should be a legally reserved term for tokens backed exclusively by cash and Treasuries has intensified as global regulatory frameworks mature. While the U.S. GENIUS Act (2025) and the EU’s MiCA have moved toward strict reserve mandates, the industry remains divided on whether a "Treasury-only" definition protects consumers or stifles the economic viability of the sector.

I. Current Regulatory Definitions by Jurisdiction

Regulatory bodies have begun codifying what constitutes a "stable" reserve, with a clear trend toward High-Quality Liquid Assets (HQLA).

II. Arguments for Restricting the Term

Proponents, including the Bank of England and the U.S. OCC, argue that a narrow definition is essential for financial stability.

• Elimination of Run Risk: The 2023 banking crisis highlighted that cash held in private banks carries counterparty risk (e.g., Circle’s $3.3B exposure to SVB). Restricting reserves to Treasuries or central bank deposits removes this risk.
• Liquidity Coverage Ratio (LCR) Protection: The ECB notes that when retail deposits move to stablecoins, banks lose stable funding and replace it with volatile wholesale deposits, which carry a 100% outflow rate under LCR rules.
• Transparency: A "Cash/Treasury" mandate simplifies oversight by removing the need for complex "haircuts" or mark-to-market valuations required for riskier assets like corporate bonds.

III. Arguments Against Strict Restriction

Industry groups like GFMA and SIFMA suggest that overly rigid definitions may have unintended consequences.

• Treasury Market Strain: Stablecoin issuers already hold ~2.1-2.5% of all outstanding U.S. T-bills. Projections suggest demand could reach $1 trillion by 2028, potentially causing liquidity shortages in the T-bill market.
• Business Model Viability: The GENIUS Act prohibits paying interest to stablecoin holders. If issuers are also restricted to low-yield Treasuries, the economic incentive to maintain the infrastructure diminishes.
• Innovation Arbitrage: Jurisdictions with more flexible "HQLA" definitions may attract more capital and developers than those with "Treasury-only" mandates.

IV. Market Composition and Impact (2026 Data)

As of April 2026, the total stablecoin market cap reached $317 billion. Major issuers have largely "self-regulated" toward high-quality assets to meet anticipated standards.

• Tether (USDT): Reported holding approximately $127B - $135B in U.S. Treasuries (roughly 63% of reserves) [Note: exact June 2026 figures are not independently confirmed].
• Circle (USDC): Maintains 1.0x backing with high-quality reserves, including T-bills and reverse repo positions [Note: specific 32% T-bill allocation claims are unverifiable].

Defensible Policy Recommendation

The most defensible policy appears to be a tiered labeling system rather than a single restricted term.

1. "Payment Stablecoins": Reserved for 100% cash/Treasury-backed tokens with direct redemption rights, suitable for retail payments.
2. "Asset-Backed Tokens": For tokens using broader HQLA (corporate bonds, etc.), requiring higher capital buffers and disclosure.
3. "Synthetic/Algorithmic": Explicitly prohibited from using the "stablecoin" label to prevent consumer confusion.

This approach balances consumer protection (by clarifying what is "as good as cash") with innovation (by allowing alternative collateral models under different labels).

Conclusion: While the U.S. has moved toward a strict "93-day Treasury" rule, the global consensus is a "Cash-Plus" model. The term "stablecoin" is effectively becoming a regulated label for HQLA-backed tokens, while algorithmic and credit-risky models are being pushed into separate, more transparently "risky" categories.

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Next Steps:

• Would you like a deep dive into the specific reserve transparency reports for USDT or USDC to verify their current Treasury allocations?
• I can monitor the U.S. Treasury's upcoming reports on stablecoin-driven T-bill demand to assess market strain risks.