An APY displayed next to a stablecoin tells you almost nothing on its own. A dollar-pegged token sitting idle in a wallet earns zero. Yield appears only when some other party decides to pay it, whether a platform subsidizing holders, borrowers paying interest, a protocol sharing surplus, or a fund passing through income from the assets it holds. Those are different businesses with different failure modes, and U.S. law is about to treat them differently.
That legal change is already on the books. The GENIUS Act, enacted on July 18, 2025 as Public Law 119-27, forbids a permitted payment stablecoin issuer from paying a holder any form of interest or yield solely in connection with holding, using, or retaining the token. What is easy to miss is that the prohibition is not yet operative. Section 20 sets the effective date at the earlier of 18 months after enactment, which lands on January 18, 2027, or 120 days after the primary federal regulators issue final rules.
A proposed rule is not a final rule. On September 29, 2026, the Federal Reserve published an implementing proposal and opened a comment period that closes on November 30, 2026. The proposal would let the Board treat certain payments routed through an affiliate or a white-label partner as an attempt to evade the prohibition unless the issuer can rebut that presumption with evidence. The direction is clear, but the operative date still waits on final regulations that do not exist yet.
For now, the practical question is who is actually paying. A platform-funded reward is a conditional subsidy under a program’s terms, so the holder depends on that platform’s solvency and its right to change rates. A DeFi lending rate is a market output: supplied tokens accrue interest at the current supply rate, which moves with utilization and governance parameters. A savings token such as sUSDS reflects a variable protocol rate funded from aggregate protocol surplus, a claim that shifts over time rather than a fixed coupon.
A tokenized Treasury fund is different again. It is a securities structure with a net asset value, management fees, and transfer restrictions, not a payment stablecoin. The same headline number, say four percent, can mean Treasury income, borrower demand, a loyalty subsidy, or a leveraged basis trade. The number is not the product.
The practical checklist is short. Identify the payer. Identify what claim you hold after depositing, whether ordinary tokens, a lending position, a savings token, a fund share, or a custodial balance. Trace where the cash flow comes from, and ask what must go wrong for principal to fall below a dollar: a depeg, a contract bug, a bridge failure, bad debt, a custody freeze, or a legal restriction.
The U.S. rule, when it takes effect, will not make all stablecoin yield illegal. It targets issuers paying yield for merely holding their token, and the Fed proposal is aimed at workarounds that route the same payment through third parties. Independent DeFi lending, tokenized funds, and genuinely third-party programs sit in different legal boxes. But the distinction that matters most to an investor is older than the statute: every return has a payer and a loss path, and no peg makes either one disappear.
Source: BTC-Pulse.