How Does sDAI Work?
sDAI is the simplest way to earn yield on the DAI stablecoin. You deposit DAI into MakerDAO's savings module and receive sDAI, a token that automatically grows in value as interest accrues. Currently earning about 3.5% APY, funded by MakerDAO's revenue from lending and real-world assets like US Treasury bills. With ~$85M TVL, it is a well-established, low-complexity DeFi product.
TVL
$79M
Sector
Yield
Risk Grade
B+
Value Grade
D-
Core Mechanisms
Token/ERC-4626-Vault
sDAI: ERC-4626 tokenized vault wrapping the Dai Savings Rate module
sDAI is an ERC-4626 representation of DAI deposited in the DSR. Users deposit DAI and receive sDAI, which appreciates in value as yield accrues. Standard vault pattern with no novel mechanics.
Yield/Savings-Rate
Dai Savings Rate (DSR) providing yield on deposited DAI from MakerDAO protocol revenues
The DSR distributes yield funded by MakerDAO/Sky stability fees, RWA revenue, and protocol surplus. Rate is governance-controlled, currently ~3.5% APY after recent reduction from 5.5%. Well-established mechanism since 2019.
Governance/DAO-Controlled-Rate
MakerDAO/Sky governance sets DSR via executive proposals
The yield rate is set by governance vote. Historical volatility: DSR has ranged from 0% to 8% depending on market conditions and protocol strategy. Users have no guarantees on rate stability.
Stablecoin/Multi-Collateral
DAI backed by crypto collateral, RWA (US Treasuries, institutional loans), and PSM stablecoins
DAI's backing has shifted significantly toward RWA exposure. Over 50% of DAI backing comes from real-world assets including US Treasury bills, reducing crypto volatility risk but introducing custodial and regulatory risk.
Integration/Cross-Chain
sDAI available on Ethereum mainnet and L2s via canonical bridges
sDAI is primarily used on Ethereum but bridgeable to L2s. Spark Protocol launched sDAI-equivalent products on Avalanche (spUSDC). The core DSR module remains on Ethereum mainnet.
How the Pieces Interact
sDAI's value is directly tied to DAI's peg. If DAI depegs due to collateral liquidation cascades or RWA custodian failure, sDAI redemptions return depeg'd DAI, crystallizing losses for all sDAI holders regardless of yield earned.
MakerDAO governance can change the DSR at any time. Rapid rate cuts (e.g., from 8% to 3.5% in 2024-2025) can cause sudden capital outflows as yield-seekers move to higher-rate alternatives, potentially destabilizing DAI demand.
RWA revenue (US Treasuries, institutional loans) funds a large portion of DSR yield. If US Treasury yields drop significantly or an RWA counterparty defaults, the protocol surplus shrinks, forcing DSR cuts or potential underfunding.
sDAI is widely used as collateral in lending protocols and yield aggregators. A vulnerability in the ERC-4626 implementation or unexpected share price behavior could propagate losses across all integrated DeFi protocols.
What Could Go Wrong
- sDAI yield is entirely dependent on the Dai Savings Rate (DSR) set by MakerDAO/Sky governance — rate changes directly affect user returns with no notice requirement
- Underlying DAI stablecoin peg risk: if DAI depegs due to MakerDAO collateral failures, sDAI inherits the same loss
- RWA-heavy backing of DAI introduces counterparty risk from off-chain custodians and traditional finance intermediaries
DAI Depeg via RWA Counterparty Failure
TailTrigger: A major RWA custodian holding a significant portion of DAI's backing (e.g., tokenized US Treasury provider) becomes insolvent or assets are frozen by regulators, causing DAI to lose its peg
- 1.RWA custodian managing 20%+ of DAI backing is sanctioned, frozen, or becomes insolvent — DAI backing ratio drops below 1:1 as RWA assets become inaccessible
- 2.DAI depegs to $0.85-0.95 on secondary markets as holders rush to exit — sDAI redemptions return depeg'd DAI; sDAI market price drops proportionally
- 3.DeFi protocols using sDAI as collateral trigger liquidations across Aave, Morpho, and others — Cascading liquidations amplify selling pressure on DAI and sDAI
- 4.MakerDAO governance scrambles to activate emergency shutdown or recapitalize the system — Extended uncertainty period where sDAI yield accrual is meaningless against capital losses
Risk Profile at a Glance
Overall: B+ (19/100)
Lower score = safer