Tether launched a gold-collateralized synthetic dollar on Ethereum

Tether introduced Alloy by Tether on June 17, 2024, opening an Ethereum-based platform for minting synthetic assets against tokenized gold. Its first product, aUSD₮, was designed to track one U.S. dollar while using Tether Gold, or XAU₮, as overcollateralized backing.

The launch mattered because it joined three established digital-asset ideas in one instrument: a dollar-denominated unit, tokenized commodity collateral and an on-chain borrowing mechanism. It was not simply another version of USDT. Rather than representing a direct claim within USDT’s reserve structure, aUSD₮ was generated through collateral positions whose value and liquidation risk depended on XAU₮ and an oracle.

A dollar unit built on gold collateral

Under Tether’s June 17 product disclosure, customers who completed identity verification and onboarding could deposit XAU₮ into an Ethereum smart-contract vault and mint aUSD₮ against it. Tether described XAU₮ as representing an undivided interest in one fine troy ounce of gold on an identifiable London Good Delivery bar held by a custodian.

The disclosure defined a position’s “Mint-to-Value” ratio as outstanding aUSD₮ divided by the oracle-assigned value of its XAU₮ collateral. The stated liquidation point was 75%, subject to change upon notice. In practical terms, a customer could not mint more than $75 of aUSD₮ for each $100 of oracle-valued collateral without reaching that threshold.

If the ratio moved above the liquidation point, approved liquidators could acquire pledged XAU₮ at a discount by returning aUSD₮ to the position. Depositing additional XAU₮ or returning aUSD₮ would reduce the ratio. Those mechanics made aUSD₮ closer to a collateralized synthetic dollar than a conventional issuer-held dollar reserve token.

The peg was a design objective, not a guarantee

The system’s oracle always valued one aUSD₮ at one U.S. dollar when calculating collateral positions. That accounting rule did not establish the token’s price on an exchange. Tether’s own risk disclosure warned that the oracle value might differ from the market value and that the company did not guarantee aUSD₮ would continuously trade at one dollar.

Gold-price movements also mattered. The initial oracle methodology described an index weighted 90% to prices from two gold-market data providers and 10% to XAU₮ prices from two digital-asset service providers. The disclosure warned that spot-gold prices generally were unavailable during specified weekend hours, creating potential gap risk when conventional gold trading resumed.

These limitations were institutionally important. Although the collateral and minted supply could be inspected on Ethereum, users still depended on Tether-affiliated entities for onboarding, whitelisting, oracle administration and approved liquidators. The physical-gold layer also depended on the issuer’s custody and ownership representations rather than blockchain data alone.

A launch with limited market evidence

Tether said Moon Gold NA and Moon Gold El Salvador, both members of its corporate group, would issue and manage Alloy products. Bitfinex separately announced on June 17 that aUSD₮ deposits were scheduled to open at approximately 14:30 UTC. Trading against U.S. dollars and USDT was planned for June 19, subject to liquidity requirements.

That schedule meant June 17 established the product and its operating design, but not a meaningful record of secondary-market liquidity, peg performance or adoption. No event-day trading price, volume or market-capitalization claim is made here. The verifiable development was the launch of a distinct gold-collateralized dollar mechanism—and Tether’s expansion from issuing reserve-backed tokens toward infrastructure for user-created synthetic assets.