USDD
TRON DAO Reserve's overcollateralized stablecoin — rebuilt with immutable contracts in 2024.
USDD (Decentralized USD) is a stablecoin issued by the TRON DAO Reserve, initially launched in May 2022 as an algorithmic design that briefly depegged to $0.97 in June 2022 due to TRX-heavy reserve composition during a market crash. Following that event, the protocol was substantially redesigned in the USDD 2.0 upgrade (2024), introducing fully on-chain overcollateralization with immutable smart contracts, a Peg Stability Module (PSM) for direct USDT redemption, and a 'Smart Allocator' mechanism that deploys reserves into market-neutral DeFi strategies to generate yield. As of Q1 2026, USDD's circulating supply was approximately $1.4B with collateral reserves — primarily TRX and sTRX (~63%), DeFi-deployed stablecoins (~31%), and USDT (~5%) — backing it at a collateral ratio typically reported above 100% (Pharos.watch, June 2026).
- Circulating supply approximately $1.4B as of Q1 2026, peak TVL of approximately $1.4B in January 2026 per KuCoin article — smaller than the $2.24B KuCoin promotional figure suggests, with DeFiLlama as the authoritative source.
- USDD 2.0 (2024) redesign removed algorithmic elements and introduced immutable smart contracts with no admin keys, on-chain overcollateralization, and a PSM for USDT redemption.
- Reserve composition as of June 3, 2026 (Pharos.watch): approximately 62.5% TRX, 1.1% sTRX, 31.5% Smart Allocator DeFi deployments, 4.9% USDT — heavily TRX-weighted, which is volatile.
- Historical depeg events: briefly traded below $0.97 in June 2022 and has had multiple minor deviations; the 2.0 overcollateral design has maintained the peg more consistently since.
- CertiK awarded USDD an 'AA' security rating (87.5/100) in November 2025 following the contract immutability upgrade.
Frequently asked questions
Is USDD safe after the 2022 depeg?
The 2.0 redesign fundamentally changed the architecture: USDD is now overcollateralized with no admin keys and a USDT PSM for arbitrage. However, the reserve remains heavily TRX-weighted (~63%), which means a severe TRX price crash could stress the collateral buffer. The collateral ratio is reported above 100% but is sensitive to TRX price. Users should review the live reserve dashboard at tdr.org before large positions.
How does USDD compare to DAI or USDS?
Both USDD and DAI/USDS are crypto-collateralized stablecoins, but DAI/USDS is backed by a diversified basket including ETH, real-world assets, and USDC, while USDD is primarily backed by TRX — a single, more volatile asset. DAI/USDS also has nine years of operating history and significantly larger TVL.
What is the USDD Smart Allocator?
The Smart Allocator is USDD 2.0's mechanism for generating yield from reserves. A portion of reserve assets (~31%) are deployed into market-neutral DeFi strategies (stablecoin pools, lending markets) to generate protocol revenue, which reduces the need for TRON DAO subsidies to maintain the peg. By June 2026, the system had generated over $8M in yield according to KuCoin reporting.