How Does Djed Stablecoin Work?
Djed is a formally verified algorithmic stablecoin on Cardano, developed by IOG (Input Output Global) and powered by COTI. DJED maintains its dollar peg through overcollateralization with ADA tokens, targeting a 400-800% reserve ratio. The dual-token system uses SHEN as a reserve coin — SHEN holders absorb ADA price volatility in exchange for earning protocol fees and ADA staking delegation rewards. Djed is unique in being one of the few stablecoins with formal mathematical verification of its safety properties. It has maintained its peg since launching in January 2023, running reliably for over 2.5 years on Cardano mainnet.
TVL
$8M
Sector
CDP
Risk Grade
C+
Value Grade
D+
Core Mechanisms
6.1.1
ADA-collateralized stablecoin with 400-800% reserve ratio enforced by smart contract
DJED is overcollateralized by ADA held in reserve pool. Minting and burning DJED adjusts supply based on oracle-reported ADA/USD price. Reserve ratio maintained between 400-800%.
1.4.3
NovelDual-token seigniorage with DJED stablecoin and SHEN reserve coin
SHEN acts as reserve coin absorbing ADA volatility. SHEN holders take leveraged ADA exposure in exchange for earning protocol fees and delegation rewards. Formally verified dual-token model based on IOG research paper.
6.4.1
External oracle for ADA/USD price feed on Cardano
Uses external oracle for ADA/USD pricing to determine minting/burning ratios and reserve adequacy. Oracle accuracy is critical for the entire dual-token balancing mechanism.
2.2.1
Protocol fee distribution to SHEN holders from minting/burning operations
SHEN holders earn fees from every DJED and SHEN mint/burn operation. Additionally earn ADA delegation rewards from staked reserve pool ADA. Aligns SHEN holder incentives with system stability.
3.1.1
ADA delegation rewards from reserve pool staking
ADA in the reserve pool is delegated to Cardano stake pools, generating additional yield for SHEN holders. Delegation rewards supplement protocol fee income.
5.2.1
NovelSmart contract enforced reserve ratio bounds preventing dangerous minting/burning
Smart contract automatically prevents DJED minting when reserve ratio would drop below 400% and prevents SHEN burning when ratio would drop below 400%. Formally verified safety bounds.
How the Pieces Interact
During severe ADA crash, reserve ratio drops rapidly. Once below 400%, DJED minting is blocked but SHEN burning is also restricted, potentially trapping SHEN holders in a declining-value position with no exit.
If SHEN demand declines during prolonged ADA downturn, the system cannot attract new reserve capital. Without sufficient SHEN overcollateralization, DJED peg becomes increasingly fragile.
Oracle latency or manipulation directly affects the price at which DJED and SHEN are minted/burned. Stale prices during volatile periods enable arbitrage at the expense of the reserve pool.
ADA delegated to stake pools has an unbonding period. During mass DJED redemptions, delegated ADA may not be immediately available, creating temporary liquidity constraints.
What Could Go Wrong
- Single-asset collateral (ADA only) means a severe ADA crash could breach the 400% overcollateralization buffer and threaten DJED peg
- SHEN reserve coin holders must absorb ADA volatility — if SHEN demand drops during prolonged downturn, system loses its stability buffer
- Cardano ecosystem has limited DeFi liquidity, constraining DJED utility and exit options during stress
ADA Crash Breaching Reserve Ratio Floor
ModerateTrigger: ADA price drops more than 70% in under two weeks while SHEN holders simultaneously attempt to exit
- 1.ADA price crashes severely in a broad market downturn — Reserve ratio drops rapidly from 400%+ toward the critical floor
- 2.SHEN holders attempt to burn and exit as their leveraged ADA position loses value — SHEN burning restricted by smart contract when ratio approaches 400%, trapping holders
- 3.No new SHEN minting occurs as rational actors avoid entering a declining system — Reserve buffer stagnates or declines with no new capital inflow
- 4.If ADA decline continues past reserve buffer capacity, DJED redemptions return less than $1 — DJED peg breaks; confidence collapse triggers rush to exit both DJED and SHEN
Risk Profile at a Glance
Overall: C+ (38/100)
Lower score = safer