Alloy Tether (AUSDT)

Alloy Tether and aUSD₮: How the Gold-Collateralized Dollar Token Worked Before Its Wind-Down

Alloy by Tether created aUSD₮, a dollar-denominated token backed by overcollateralized Tether Gold on Ethereum. Its design combined collateralized borrowing, liquidation rules, oracle pricing and secondary-market trading, but new minting has now closed and the platform is scheduled to wind down.

What Alloy by Tether was designed to do

Alloy by Tether was a platform for issuing Tethered Assets: digital tokens intended to track a reference price through overcollateralization and secondary-market liquidity rather than through a simple one-to-one fiat reserve. Its first product, aUSD₮, was denominated in U.S. dollars but used Tether Gold, or XAU₮, as collateral. This created a hybrid design: the token sought dollar-like usability while its collateral value was linked to gold.

The distinction from Tether’s conventional fiat-pegged tokens was material. According to the project’s documentation, aUSD₮ was not designed around direct redemption for one U.S. dollar. Instead, its intended stability depended on collateral valuation, minting and return rules, liquidations and market arbitrage. That structure exposed users to both the behavior of gold and the operational rules of the Alloy contracts.

How aUSD₮ was minted

A user wishing to mint aUSD₮ deposited XAU₮ into an Alloy vault. The vault recorded the user’s collateral and outstanding aUSD₮ in a Collateral Mint Position, or CMP. The project documentation describes these positions as isolated records associated with a verified Ethereum address, allowing the system to calculate the position’s Mint to Value ratio, or MTV.

The maximum MTV was 75%. In practical terms, the value of minted aUSD₮ could not exceed three-quarters of the oracle-reported value of the XAU₮ collateral without putting the position into liquidation territory. Minting also carried a documented 25-basis-point fee, while returning aUSD₮ carried a separate 25-basis-point fee. These fees were part of the position accounting rather than an optional exchange charge.

Liquidations and the intended dollar peg

If a CMP’s MTV reached the 75% liquidation point, the position could be liquidated by an approved liquidator. The liquidator returned aUSD₮ to the contract and received the user’s XAU₮ collateral at a discount to the oracle price. The mechanism was intended to reduce the outstanding debt and preserve collateral coverage, but it also meant that a sharp fall in gold’s value could force a collateral sale even if aUSD₮ itself remained close to its reference price.

The project’s documentation described two arbitrage paths. If aUSD₮ traded below one dollar, a user with an outstanding position could buy the discounted token and return it to the contract at the system’s reference valuation, potentially releasing collateral. If aUSD₮ traded above one dollar, users could mint against available XAU₮ and sell the new tokens in the market. These mechanisms were intended to pull market prices toward the reference value, but they depended on functioning liquidity, available collateral and continued access to the platform.

Access, control and Ethereum dependency

Alloy was not an unrestricted permissionless minting system. The documentation required users to complete verification and have Ethereum addresses whitelisted before interacting with the minting contracts. The project described the eligible users as verified individuals or institutions, while liquidations were also restricted to whitelisted liquidators. This compliance layer limited who could create or manage primary-market positions, even though token transfers and contract activity could be inspected on Ethereum.

The aUSD₮ token contract was deployed on Ethereum and appears on Etherscan as a proxy contract. The explorer identifies the contract at 0x9EEAD9ce15383CaEED975427340b3A369410CFBF and shows an implementation address and proxy-upgrade history. That architecture makes the contract address auditable, but it also means users must consider administrator permissions, upgrade controls and the possibility that contract behavior can be changed by authorized parties. The available documentation does not establish that Alloy had decentralized governance or a token-holder voting system.

What the wind-down changes

The project’s current official website states that Alloy by Tether and aUSD₮ are winding down and that new minting is closed. Tether’s June 17, 2026 announcement said the decision followed a review of user activity, market demand and broader company priorities. The announcement also said the interface would stop allowing new positions or new aUSD₮ issuance while existing users were given a path to return aUSD₮ and remove XAU₮.

As of September 15, 2026, the official Alloy site instructs users to return aUSD₮ and remove their XAU₮ by September 17, 2026. Tether’s announcement states that customers who have not returned their aUSD₮ by that date will no longer be able to recover their XAU₮ through the platform. This makes the wind-down, rather than future issuance or expansion, the central practical fact for anyone assessing aUSD₮ today.

Who the system was for, and its limits

Alloy was aimed at users and institutions that already held or could acquire XAU₮ and wanted to create a dollar-denominated asset without selling that gold exposure outright. The design offered a way to use gold collateral within an Ethereum-based system, but its usefulness depended on access to XAU₮, successful identity verification, Ethereum transaction costs, oracle inputs, liquidators and secondary-market liquidity.

The main limitation was that aUSD₮ stability was not equivalent to a guaranteed cash redemption. Users faced collateral-price risk, liquidation risk, smart-contract and upgrade risk, issuer and compliance risk, and the possibility that market liquidity would weaken. The scheduled closure adds a further operational risk: holders must follow the official wind-down process and should not assume that aUSD₮ can continue to be minted, returned or redeemed through the same interface after the stated deadline.

Key takeaways

• aUSD₮ was a dollar-denominated Tethered Asset backed by overcollateralized XAU₮ rather than a conventional one-to-one fiat reserve.
• Users created aUSD₮ by depositing Tether Gold into an Alloy vault and maintaining an MTV below the 75% liquidation point.
• Minting required verified users and whitelisted Ethereum addresses; liquidations were also restricted to approved participants.
• The system depended on oracle pricing, XAU₮ liquidity, liquidators, Ethereum and the controls of upgradeable smart contracts.
• New minting is closed, and the official wind-down instructions set September 17, 2026 as the key deadline for returning aUSD₮ and removing collateral.

Risks and open questions

• The design did not provide the same direct dollar-redemption model as a conventional fiat-backed stablecoin.
• A fall in XAU₮ value could increase a position’s MTV and trigger liquidation of collateral.
• The token contract is upgradeable, so authorized contract controls and implementation changes are material dependencies.
• The system required KYC, address whitelisting and approved liquidators, limiting permissionless access.
• Secondary-market liquidity and the ability to acquire aUSD₮ for returns were practical prerequisites for some users.
• The wind-down creates deadline and access risk for any holder who has not completed the required return and collateral-removal process.