{"id":"usdd","hidden":false,"ipfs":"QmNoHXMYPn58YA7CDjJ7edKe1CuBWTnuaXQbtF5RkJtJU7","language":"en","transactionHash":"0x2ac27c9f634c5f09b62f8e3ed32ed158fb3ddbe98eb328e4336af53e3c33f203","created":"2023-05-24T17:45:26.375Z","updated":"2026-06-08T23:47:36.853Z","title":"USDD","summary":"USDD is a decentralized, over-collateralized USD-pegged stablecoin that originated as an algorithmic design on TRON in 2022 and was upgraded in 2025 to USDD 2.0, a multi-chain, vault-based stablecoin with a Peg Stability Module and on-chain governance.","content":"**USDD (Decentralized USD)** is a decentralized, over-collateralized [stablecoin](https://iq.wiki/wiki/stablecoin) that aims to maintain a 1:1 peg to the US dollar using crypto-asset reserves and on-chain governance across the TRON, [Ethereum](https://iq.wiki/wiki/ethereum), and [BNB Chain](https://iq.wiki/wiki/binance-smart-chain) networks.[\\[1\\]](#cite-id-v1ug2j8dc0i)​[\\[2\\]](#cite-id-34ta8zvm9w7)​[\\[3\\]](#cite-id-91ey3njaz) It was initially launched in May 2022 as an algorithmic stablecoin governed by the TRON DAO [Reserve](https://iq.wiki/wiki/reserve), often referred to as USDD 1.0 or USDDOLD, and was redesigned in January 2025 as USDD 2.0, a fully on-chain, collateral-backed system using over-collateralized user vaults and a Peg Stability Module (PSM).[\\[11\\]](#cite-id-2jhrnvk9ngq)​[\\[15\\]](#cite-id-2lkke229kw)​[\\[16\\]](#cite-id-oftv5zu2xi)​\n\n[YOUTUBE@VID](Pnu_-9oxT8k)\n\n## History\n\nOn April 21, 2022, TRON founder [Justin Sun](https://iq.wiki/wiki/justin-sun) published an open letter describing a “stablecoin Era 3.0” and announcing USDD as a decentralized algorithmic USD stablecoin intended to remove reliance on centralized custodians for price stability.[\\[5\\]](#cite-id-ccts4rsqy1j)​[\\[7\\]](#cite-id-jz9ib2bpcc)​[\\[6\\]](#cite-id-0aon3hqxstld) USDD launched on May 5, 2022 on the TRON network with an initial supply of 100 million tokens and was made natively available on [Ethereum](https://iq.wiki/wiki/ethereum) and [BNB Chain](https://iq.wiki/wiki/binance-smart-chain) via [BitTorrent](https://iq.wiki/wiki/bittorrent) Chain’s cross-chain protocol.[\\[8\\]](#cite-id-7jq7yak7tjw)​[\\[9\\]](#cite-id-w19s4t6n9x) In this first iteration (USDD 1.0 / USDDOLD), the protocol combined an algorithmic mint-and-burn mechanism between USDD and TRX with a reserve managed by the TRON DAO [Reserve](https://iq.wiki/wiki/reserve) (TDR) and participation from TRON Super Representatives, alongside a stated goal of over-collateralization using assets such as BTC and USDT.[\\[10\\]](#cite-id-bt6jq98172d)​[\\[11\\]](#cite-id-2jhrnvk9ngq)​\n\nIn October 2022, USDD was designated as legal tender in the Commonwealth of Dominica as part of a broader collaboration between Dominica and the TRON ecosystem.[\\[11\\]](#cite-id-2jhrnvk9ngq) During 2022, the original design experienced several de‑pegging episodes: in June 2022, USDD traded down toward $0.97 and briefly around $0.93, and in November 2022, amid the FTX collapse, it again fell below $0.97 while its Curve [liquidity pool](https://iq.wiki/wiki/liquidity-pool) became heavily imbalanced in favor of USDD.[\\[12\\]](#cite-id-2cels0xsgon)​[\\[13\\]](#cite-id-2tjzyhkbfjn)​[\\[11\\]](#cite-id-2jhrnvk9ngq) These incidents drew external scrutiny of the hybrid algorithmic model and reserve transparency, and they are discussed in more detail in the Controversy or Litigation section.\n\nFollowing community discussion and governance within the TRON ecosystem, USDD underwent a major architectural upgrade to USDD 2.0. The over‑collateralized, vault‑based model was launched on TRON on January 25, 2025, replacing algorithmic issuance with fully on‑chain [collateral](https://iq.wiki/wiki/collateral) vaults and an expanded Peg Stability Module.[\\[15\\]](#cite-id-2lkke229kw)​[\\[17\\]](#cite-id-e3b6pzqh1x) USDD 2.0 was later deployed natively on Ethereum on September 8, 2025, further extending the stablecoin’s presence beyond its original cross-chain bridges.[\\[15\\]](#cite-id-2lkke229kw)​\n\n## Design and Mechanism\n\nUSDD 2.0 is designed as an over‑collateralized [stablecoin](https://iq.wiki/wiki/stablecoin) system in which users mint and redeem USDD through fully on‑chain vaults. These vaults accept [collateral](https://iq.wiki/wiki/collateral) assets such as TRX, staked TRX (sTRX), USDT, and [USDC](https://iq.wiki/wiki/usdc); users can permissionlessly mint USDD by depositing supported collateral, provided their position remains above a protocol‑defined minimum [collateralization ratio](https://iq.wiki/wiki/collateralization-ratio).[[15]](#cite-id-2lkke229kw) When the value of collateral in a vault falls and the position becomes under‑collateralized relative to this threshold, the system triggers [liquidations](https://iq.wiki/wiki/liquidation) via public mechanisms, enabling other participants to repay USDD and acquire the discounted collateral, thereby maintaining solvency.[[16]](#cite-id-oftv5zu2xi) The protocol targets an aggregate collateralization level above 100%—that is, collateral of greater value than the circulating USDD supply—with all vault collateral and system parameters verifiable on‑chain.[[1]](#cite-id-v1ug2j8dc0i)​[[17]](#cite-id-e3b6pzqh1x)\n\nA core component of USDD’s peg maintenance is the Peg Stability Module (PSM), an on‑chain contract that allows users to swap between USDD and major stablecoins such as USDT and USDC at a fixed 1:1 rate with no price [slippage](https://iq.wiki/wiki/slippage).[[10]](#cite-id-bt6jq98172d)​[[11]](#cite-id-2jhrnvk9ngq) This mechanism provides a low‑friction [arbitrage](https://iq.wiki/wiki/arbitrage) channel: when USDD trades below $1 on secondary markets, users can buy it and swap via the PSM into other stablecoins at par, and conversely, when it trades above $1, they can swap into USDD at par and sell it, helping to restore the peg. Under USDD 2.0, PSM flows and on‑chain vault dynamics work together to stabilize the price while keeping collateral management transparent and auditable.[[15]](#cite-id-2lkke229kw)​\n\nUSDD’s original model (USDD 1.0 / USDDOLD), used from launch in May 2022 until the 2025 upgrade, relied more heavily on algorithmic mint‑and‑burn mechanisms and the TRON DAO [Reserve](https://iq.wiki/wiki/reserve). When USDD traded below $1, users were able to burn USDD in exchange for $1 worth of TRX, reducing [circulating supply](https://iq.wiki/wiki/circulating-supply); when USDD traded above $1, they could burn $1 worth of TRX to mint 1 USDD, expanding supply.[[11]](#cite-id-2jhrnvk9ngq) This design was supplemented by reserve assets (including BTC and USDT) held by the TRON DAO Reserve and by the involvement of 27 TRON Super Representatives—[validators](https://iq.wiki/wiki/validator) elected by TRX holders—who participated in maintaining network security and the broader economic environment around USDD.[[10]](#cite-id-bt6jq98172d)​[[11]](#cite-id-2jhrnvk9ngq) With the transition to USDD 2.0, these earlier algorithmic mechanisms have been largely superseded by the vault‑based over‑collateralization model, which no longer depends on TRX mint‑and‑burn for peg stability.[[17]](#cite-id-e3b6pzqh1x)\n\n## Tokenomics and Distribution\n\nUSDD does not have a fixed maximum supply; instead, its total and [circulating supply](https://iq.wiki/wiki/circulating-supply) expand or contract based on user demand and [collateral](https://iq.wiki/wiki/collateral) deposits, with the protocol aiming to maintain a dollar peg through over‑collateralization and risk controls.[[3]](#cite-id-91ey3njaz)​[[2]](#cite-id-34ta8zvm9w7) As of 2026, the circulating supply is roughly 1.5–1.6 billion USDD, backed by diversified digital-asset collateral held in on‑chain vaults and related reserve mechanisms.[[3]](#cite-id-91ey3njaz)​[[1]](#cite-id-v1ug2j8dc0i) Under USDD 2.0, each token is intended to be backed by more than one dollar’s worth of collateral, with system parameters calibrated by governance to keep the overall collateral ratio above 100%.[[15]](#cite-id-2lkke229kw)​\n\nUsers can obtain USDD in several ways: by minting it directly through over‑collateralized vaults on supported chains; by swapping other [stablecoins](https://iq.wiki/wiki/stablecoin) such as USDT and [USDC](https://iq.wiki/wiki/usdc) for USDD via the PSM at a 1:1 rate; or by purchasing it on centralized and decentralized exchanges where USDD is listed.[[10]](#cite-id-bt6jq98172d)​[[15]](#cite-id-2lkke229kw)​[[2]](#cite-id-34ta8zvm9w7) Within the ecosystem, an interest‑bearing token, sUSDD, allows holders to earn yield on USDD through a “Smart Allocator” that deploys underlying collateral into DeFi strategies, with the resulting returns reflected in the value of sUSDD while keeping redemptions fully on‑chain and backed by USDD.[[1]](#cite-id-v1ug2j8dc0i)\n\n## Governance\n\nUSDD emphasizes decentralized, on‑chain governance processes in which protocol changes are introduced through community proposals and implemented following on‑chain voting.[[1]](#cite-id-v1ug2j8dc0i) Within the broader JUST and TRON DeFi ecosystem, JST functions as the primary [governance token](https://iq.wiki/wiki/governance-tokens), with holders able to participate in setting or adjusting parameters such as [collateral](https://iq.wiki/wiki/collateral) types, [collateralization ratios](https://iq.wiki/wiki/collateralization-ratio), interest‑rate policies, and risk controls across associated protocols that interact with USDD.[[1]](#cite-id-v1ug2j8dc0i)​[[17]](#cite-id-e3b6pzqh1x)\n\nUnder USDD 2.0, governance decisions include the onboarding and weighting of collateral assets in vaults, refinement of [liquidation](https://iq.wiki/wiki/liquidation) incentives and safety margins, and configuration of base APY settings for savings products tied to USDD and sUSDD.[[16]](#cite-id-oftv5zu2xi) Migration‑related parameters, such as the schedule for sunsetting USDDOLD and the mechanics of the 1:1 upgrade path, have also been subject to community‑oriented processes, reflecting an intention to reduce reliance on centralized control over time.[[18]](#cite-id-hjyihrm8br)​[[19]](#cite-id-042jda16wi)\n\n## Regulation\n\nIn October 2022, the Commonwealth of Dominica granted USDD legal tender status as part of an agreement that recognized several TRON‑based tokens for use within the country, making USDD one of the few crypto-asset [stablecoins](https://iq.wiki/wiki/stablecoin) to receive such designation from a sovereign state.[[11]](#cite-id-2jhrnvk9ngq) Outside Dominica, USDD functions as a crypto‑asset stablecoin issued and used within decentralized networks, and it operates within the generally applicable regulatory frameworks for digital assets and stablecoins in each jurisdiction where exchanges and users access it, rather than under a single, bespoke global regulatory regime.[[2]](#cite-id-34ta8zvm9w7)​\n\n## Controversy & Litigation\n\nShortly after USDD’s initial launch in May 2022, the [stablecoin](https://iq.wiki/wiki/stablecoin) traded below its intended $1 peg, dipping toward $0.97 and briefly around $0.93 on some platforms.[[12]](#cite-id-2cels0xsgon)​[[11]](#cite-id-2jhrnvk9ngq) The TRON DAO [Reserve](https://iq.wiki/wiki/reserve) responded by injecting hundreds of millions of dollars’ worth of [collateral](https://iq.wiki/wiki/collateral), including 700 million [USDC](https://iq.wiki/wiki/usdc), and stated that USDD’s [collateralization ratio](https://iq.wiki/wiki/collateralization-ratio) had been raised to around 300%, arguing that volatility within approximately ±3% could still be acceptable for a stablecoin under stress.[[12]](#cite-id-2cels0xsgon) External observers nevertheless questioned the transparency and composition of the reserves and the robustness of the hybrid algorithmic design during extreme market conditions.[[11]](#cite-id-2jhrnvk9ngq)\n\nIn November 2022, during the collapse of FTX and related entities, USDD again de‑pegged, falling below $0.97.[[13]](#cite-id-2tjzyhkbfjn) The main USDD [liquidity pool](https://iq.wiki/wiki/liquidity-pool) on [Curve Finance](https://iq.wiki/wiki/curve-finance) became heavily imbalanced, with roughly 80% of the pool consisting of USDD, suggesting that many holders were seeking to exit the stablecoin relative to other assets.[[13]](#cite-id-2tjzyhkbfjn) [Justin Sun](https://iq.wiki/wiki/justin-sun) publicly suggested that [Alameda Research](https://iq.wiki/wiki/alameda-research) had been selling USDD to raise liquidity, contributing to selling pressure in the pool.[[14]](#cite-id-pulohctaar)​[[11]](#cite-id-2jhrnvk9ngq) These episodes intensified scrutiny of USDD’s early algorithmic and reserve structure and formed part of the context for the later migration to the fully over‑collateralized USDD 2.0 architecture, which its backers present as more conservative and transparent.[[15]](#cite-id-2lkke229kw)​[[17]](#cite-id-e3b6pzqh1x)","recentActivity":"{\"items\":[{\"id\":\"be1bc6bd-8869-4f02-931e-4064f421c73c\",\"title\":\"USDD\",\"description\":\"USDD is a decentralized USD stablecoin launched by TRON on BNB Chain, Ethereum, and TRON networks, aimed at overcoming limitations of earlier 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