What actually backs a stablecoin

Every dollar stablecoin claims to be worth a dollar. What differs — enormously — is why it should be worth a dollar, and who is obliged to make that true when it isn't. That mechanism is the entire product. Everything else is branding.

Three families, three different promises

Fiat-backed. The issuer takes real dollars, holds them in cash and short-dated government paper, and issues tokens against them. The peg holds because approved parties can redeem tokens for dollars at par. This is the simplest structure and the one most regulation is written around.

Crypto-backed. The token is minted against crypto collateral locked in smart contracts, deliberately over-collateralised — you might lock $150 of assets to mint $100 of stablecoin. The peg holds through liquidation mechanics: if collateral falls in value, positions are automatically closed to keep the system solvent. No bank is involved, which is the point; the trade-off is dependence on collateral liquidity and on the code working under stress.

Synthetic / delta-neutral. The token is backed by a position — typically holding an asset while shorting a derivative against it, so the combined value stays roughly flat in dollar terms. These can pay an attractive yield, because the funding on that derivative position is the yield source. They are also the most structurally involved, and they depend on derivatives venues functioning normally and on that funding staying positive.

None of these is inherently unsound, and none is inherently safe. But they fail in completely different ways, so "stablecoin" tells you almost nothing on its own.

Attestation is not audit

This distinction does more work than any other in this space, and it is routinely blurred.

An attestation is an accountant confirming that, at a specific moment, the reserves the issuer showed them existed and totalled a certain amount. It is a photograph. It generally does not test internal controls, does not cover the period between photographs, and does not opine on whether the business as a whole is sound.

An audit is a much broader examination of the financial statements, with an opinion attached and a firm putting its name to it.

Most stablecoin issuers publish attestations — often monthly. Fewer publish full audited financials. An attestation is genuinely useful information and far better than nothing, but if a project's page says "audited" and links to a monthly attestation report, that is a wording problem worth noticing.

Then there is on-chain proof of reserves, where reserve holdings are verifiable on a blockchain in real time. This is powerful for crypto-collateralised systems, where the collateral genuinely lives on-chain and can be checked by anyone. It is much weaker as evidence for a fiat-backed coin, because the thing you actually want to verify — dollars in a bank account — is not on a blockchain. A dashboard showing token supply is not proof that the cash exists.

Redemption rights are what hold the peg

A stablecoin trades at a dollar because someone can profitably buy it below a dollar and redeem it for a dollar. When that arbitrage works, the peg is self-correcting. So the questions that matter are:

• Who can redeem? Direct redemption is often limited to verified institutional partners, not retail holders.
• What is the minimum? If it is $100,000, the peg is maintained on your behalf by others.
• In what window? Business days only? Subject to suspension?
• Under what conditions can it be paused? Read this clause specifically.

If you cannot redeem, your exit is the open market — which is exactly where the price falls when everyone else wants out too.

Regulation tells you who is on the hook

Regimes now exist in several jurisdictions setting rules for reserve composition, segregation of client assets, disclosure and redemption. Where an issuer is licensed determines what it is obliged to do and who supervises it — and, if things go wrong, what you can actually claim.

Being regulated somewhere is not a guarantee of anything. But an unregulated issuer's promises are enforceable only as ordinary contract, in whatever jurisdiction it happens to sit.

The checklist

Before holding any meaningful amount:

1. Which family is it — fiat, crypto-collateralised, or synthetic?
2. What exactly is in reserve — cash, T-bills, repo, other crypto, a derivatives position?
3. Who verifies it, how often, and is that an attestation or an audit?
4. Can you redeem, at what minimum, and can that be suspended?
5. Who regulates the issuer, and in which jurisdiction?
6. Has it de-pegged before, and what happened — did the mechanism work, or did someone step in?

Work through those six for any coin you hold, and check them against the issuer's own transparency page rather than a summary of it — the answers change more often than the marketing does.

One thing to keep in perspective

Stablecoins de-peg. It has happened to large, well-regarded, fully-reserved coins for reasons that had nothing to do with their own reserves — a bank they used got into trouble, and the market priced the uncertainty until it was resolved. Most recovered. Some did not.

Holding any token carries issuer risk, custody risk, regulatory risk and smart-contract risk simultaneously. Understanding the mechanism does not remove those risks; it just means you know which one you are taking.