Gemini Dollar

Gemini Trust Company introduced GUSD in September 2018 after New York approved the product. Its white paper began with an unusual concession for crypto: a fiat stablecoin still depends on a centralized issuer.

Ethereum would publish supply, while a regulated trust company would hold dollars and process creation and redemption.

Before launch, Trail of Bits spent eight person-weeks examining minting, burning, sweeping and upgrades. It found nine issues—two high, two medium, four low and one informational—and reported that Gemini resolved them.

The review tells us how the 2018 code was challenged; it is not a standing opinion on every later implementation or reserve operation.

A customer buys GUSD on Gemini with dollars and the issuer creates matching tokens. To leave, the customer submits a GUSD sell order, the token balance is debited, and dollars are credited or sent from reserve assets.

The current agreement treats redemption as complete after Gemini has fully processed the compliant sell order and initiated the transfer from reserve assets. It allows no more than one full business day after the business day of receipt, tighter than NYDFS’s default T+2 baseline, but does not guarantee when the receiving bank will post the funds.

The door has conditions. Only Gemini customers may create or redeem directly, and suspected conduct violations can stop an order. A person who receives GUSD in an external wallet has a transferable ERC-20 but no direct bank relationship.

NYDFS expects lawful holders to receive par redemption subject to successful onboarding and other reasonable legal requirements; the path back to dollars therefore runs through Gemini’s identity and compliance process.

The 2018 paper spoke simply about dollars matching tokens. NYDFS turned that idea into a more exact operating rule in 2022: end-of-day reserves must cover every unit and remain segregated for holders.

The same rule requires eligible short-term assets and monthly CPA examination at month-end and on a randomly selected day.

Gemini’s present agreement permits bank deposits, government money-market funds and Treasury obligations. Interest generated by those accounts goes to Gemini as a fee, not automatically to GUSD holders.

BPM’s report for May tested May 4 and May 29. On May 29 it matched 40,136,854.84 GUSD with the same net reserve amount, after a $500,211.38 settlement adjustment; the assets were cash deposits at State Street and Western Alliance Bank.

That result is a point-in-time examination. Gemini’s public report feed ended at May, so it did not verify the reserve mix against September’s smaller 39,285,184.62 on-chain supply.

GUSD’s public address stays fixed, but it is only a Proxy. It delegates token logic to an implementation and keeps balances in a separate Store.

The live implementation accepted mint requests and required custodian confirmation, while a PrintLimiter set a 1.36 billion GUSD ceiling that its custodian could raise.

A verified Custodian required two signatures and used one-hour or extended 24-hour locks; the Proxy’s own direct custodian contract did not have verified source on the reviewed explorer.

This design was intentional. Gemini’s agreement says it may modify the contracts for a catastrophic event, maintenance or legal compulsion, and that GUSD implicated in conduct violations may be frozen, seized, forfeited or destroyed.

The current implementation’s sweep path requires a signed holder message; there is no simple verified per-address blacklist function there. Yet the upgrade chain means today’s methods are not the outer limit of Gemini’s technical control.

Gemini says reserve accounts are separated from its operating accounts and held for customers. It also says only Gemini and its agents can instruct the banks, and a non-customer holder has no relationship with those banks.

Redemption is the practical route from token to reserve value; an ERC-20 balance is not a title to a particular Treasury bill or bank account.

The FDIC language needs the same precision. Cash at an insured bank may qualify for pass-through treatment if records and other conditions hold and the bank enters resolution.

GUSD itself is not a deposit insured by the U.S. government. Treasury obligations and money-market fund shares do not become FDIC-insured because they sit in the reserve.

The peg rests on reserve quality, timely redemption, reporting and Gemini’s continued operational access—not on Ethereum alone.