USDD is TRON’s premier decentralized stablecoin, providing a secure, 1:1 USD-pegged asset backed by a transparent, overcollateralized reserve. Through advanced mechanisms like the Peg Stability Module (PSM) and automated collateral vaults, USDD serves as a high-yield savings engine and a stable medium of exchange across the global DeFi landscape.
Official domain: usdd.io
While USDD began as a single stablecoin within the JUST suite, it has grown into a self-contained ecosystem with its own minting vaults, peg stability infrastructure, savings protocol, and yield engine. It operates across both TRON and Ethereum (deployed natively on both chains since 2025), and its reserve management and yield generation touch multiple DeFi protocols.
Every USDD in circulation is backed by reserve assets worth more than $1.00. The TRON DAO Reserve holds a basket of:
| Reserve asset | Role |
|---|---|
| USDT | Primary peg stability anchor — enables 1:1 PSM swaps |
| USDC | Secondary stablecoin reserve |
| TRX | Native TRON collateral — used in minting vaults |
| sTRX | Liquid staked TRX — earns yield while serving as collateral |
| WBTC | Diversification asset — reduces TRON-specific concentration risk |
The real-time collateralization ratio and full reserve breakdown are visible on the USDD dashboard at usdd.io. The protocol targets persistent overcollateralization — total reserve value exceeding circulating USDD supply — as its primary stability guarantee.
The PSM is the mechanism that keeps USDD at $1.00. It enables 1:1 swaps between USDD and major stablecoins (USDT, USDC) with no slippage and minimal fees:
This two-way arbitrage loop maintains tight peg stability under normal market conditions. The PSM reserves are funded by the TRON DAO Reserve.
USDD utilizes a Multi-Collateral Vault system similar to Sky (formerly MakerDAO), allowing users to choose between safety and capital efficiency across different tiers.
Users can mint USDD directly by depositing collateral into these vaults:
| Vault type | Collateral | Min. Collateral Ratio | Stability Fee | Notes / Use Case |
|---|---|---|---|---|
| TRX-A | TRX | 130% | ~0.5% | Conservative; lowest stability fees. |
| TRX-B | TRX | 125% | Varies | Balanced; standard for most DeFi users. |
| TRX-C | TRX | 120% | Higher | Aggressive; highest capital efficiency. |
| sTRX-A | sTRX | 117% - 130% | ~1.0% | Liquid Staked TRX; earns yield while acting as collateral. |
| WBTC-A | WBTC | 150% | 2.5% | Conservative Bitcoin-backed USDD. |
| WBTC-B | WBTC | 130% | 3.5% | High-efficiency Bitcoin-backed USDD. |
Vault users must maintain their collateral ratio above the liquidation threshold. If the value of the deposited collateral falls below the minimum, the vault is automatically liquidated to protect the protocol’s solvency.
USDD Savings — accessible at usdd.io/sa — allows users to deposit USDD and earn passive yield. In return for depositing, users receive sUSDD, a yield-bearing receipt token.
sUSDD is not a reward token — it is a receipt token with an appreciating exchange rate. The value of 1 sUSDD in terms of USDD increases continuously as yield accrues to the savings pool. This means:
The yield paid to sUSDD holders comes from the Smart Allocator — the protocol’s on-chain treasury management system. The Smart Allocator:
All Smart Allocator activities are transparent and verifiable on-chain. The yield is real — derived from actual DeFi activity, not from inflationary token emissions.
| Parameter | Value |
|---|---|
| Peg target | $1.00 USD |
| Collateralization model | Overcollateralized (reserve > supply) |
| PSM swap rate | 1:1 (USDD ↔ USDT/USDC) |
| Savings token | sUSDD (appreciating exchange rate) |
| Yield source | Smart Allocator (DeFi lending, LP fees, funding rates) |
| Native chains | TRON, Ethereum |
| Governance | TRON DAO Reserve + JUST DAO |
| Vault liquidation ratios | 117%–150% (varies by vault type) |
Depeg risk
USDD relies on overcollateralization and PSM arbitrage to maintain its $1.00 peg. Under extreme market conditions — such as simultaneous sharp declines in TRX and BTC — the reserve buffer may be stressed. The peg has deviated from $1.00 historically. Monitor the collateralization ratio at usdd.io.
Vault liquidation risk
Users who mint USDD via collateral vaults are exposed to liquidation if their collateral ratio drops below the threshold. Cascading liquidations during market downturns can amplify volatility. Always maintain a safety margin above the minimum ratio.
Smart Allocator counterparty risk
The yield paid to sUSDD holders depends on the Smart Allocator’s DeFi deployments. If any of the downstream protocols (lending platforms, DEXes) experience exploits or failures, it could impact the yield or, in extreme scenarios, the reserve value.
Reserve centralization
While USDD operates through on-chain smart contracts, the management of reserve allocation strategies and some custody decisions rely on the TRON DAO Reserve’s operational security and multi-sig infrastructure. This introduces a degree of centralization risk.