A stablecoin is a digital token designed to hold a fixed value — almost always one U.S. dollar — by being backed with reserves of cash and short-term government securities. Stablecoins are the cash leg of blockchain markets: the settlement money that tokenized assets trade against, now operating under a federal regulatory framework.
How stablecoins work
The dominant model is fiat-backed: an issuer sells tokens for dollars, holds the proceeds in reserves (cash, Treasury bills, and equivalents), and redeems tokens at par on demand — economically, a bearer claim on a money-market-style reserve pool, transferable globally in minutes. The peg holds because arbitrage works when redemption works: any discount invites buying tokens and redeeming at par. The model’s history supplies its risk lessons — reserve quality and redemption access are everything, and the category’s failures (algorithmic designs backed by circularity rather than assets, most famously the 2022 Terra collapse; depeg scares when reserves touched troubled banks) all trace to one or the other.
The GENIUS Act framework. The 2025 federal stablecoin law established the rules U.S. payment stablecoins now operate under: permitted issuers (federally or state supervised), full 1:1 reserves in high-quality liquid assets with monthly public disclosure, redemption rights, and a prohibition on issuers paying interest or yield to holders — the provision that keeps payment stablecoins classified as payment instruments rather than securities, and that channels yield-seeking demand toward tokenized money-market funds instead. The framework’s arrival did what regulatory clarity usually does: accelerated institutional entry, bank and fintech issuance plans, and integration of stablecoin rails into mainstream payments.
Why an alternatives glossary includes them: stablecoins are infrastructure the RWA market runs on — subscription and redemption money for tokenized funds, settlement for on-chain credit, collateral movement — and their reserve pools have become a structurally significant buyer of short-term Treasuries, a macro footnote with real rate-market commentary attached. The advisor framing: a stablecoin is cash plumbing, not an investment — it yields nothing to the holder by design, its risk is issuer/reserve/operational rather than market, and “which stablecoin” is a counterparty-quality question (reserve composition, attestation, regulatory status) rather than a portfolio one.
FAQ
What is a stablecoin in simple terms?
A digital dollar: a token redeemable one-for-one for U.S. dollars, backed by reserves of cash and Treasury bills, used as the money of blockchain markets.
Are stablecoins safe?
Regulated fiat-backed stablecoins under the federal framework hold full reserves in high-quality assets with disclosure and redemption requirements — the residual risks are issuer operations and reserve access, not market price. Unregulated and algorithmic designs have failed badly.
Do stablecoins pay interest?
Not to holders — U.S. law prohibits issuer-paid yield on payment stablecoins. The reserves earn interest for the issuer; yield-seeking capital uses tokenized money-market funds instead.
Related terms
Tokenization / RWA · Alternative Investment · Special Purpose Vehicle (SPV) · Liquidity
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