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Of the major dollar-pegged stablecoins, USDT and USDC are backed by dollars in a bank; is backed by crypto locked in a smart contract that no one can unilaterally freeze. That difference — trust in a company vs. trust in code — is the whole bet of . The experiment has now survived a 40% crash, a governance controversy, and the addition of real-world assets to its balance sheet. It is the closest thing DeFi has to a reserve currency — and its survival is not guaranteed.
The premise: a stablecoin without a bank
Most stablecoins are simple: a company holds dollars in a bank and issues one token per dollar. The trust model is “trust the company.” MakerDAO's design inverts this. There is no bank. There is only a smart contract — the Maker Protocol — and a set of parameters set by holders of the MKR governance token.
To mint DAI, you lock up collateral (ETH, WBTC, and increasingly other assets) in a Vault (formerly a “CDP”). The protocol lets you borrow DAI against it up to a (e.g., 150% — you must lock $1.50 of ETH to mint $1 of DAI). The collateral stays locked until you repay the DAI plus a small (an interest rate set by MKR holders). If the value of your collateral falls below the liquidation ratio, the protocol liquidates it — selling the collateral to repay the DAI.
The design goal is a stablecoin that is decentralized: no single issuer, no bank account to freeze, no KYC. The cost of that property is a much more complicated system and an exposure to crypto volatility that dollar-backed stablecoins don't have.
How the peg actually works
DAI's peg to $1 is not enforced by redemption (as USDC's is). You can't always hand the protocol $1 of DAI and demand $1 of collateral back. Instead, the peg is held by two reinforcing mechanisms:
- Arbitrage via the stability fee. If DAI trades above $1, minting DAI is cheap (you borrow at the fixed stability fee), so people mint more, increasing supply and pushing the price down. If DAI trades below $1, MKR holders can raise the stability fee, making borrowing more expensive and incentivizing repayment (which buys DAI on the market, pushing the price up).
- The Peg Stability Module (PSM). Introduced after the 2020 crash, the PSM lets users swap USDC for DAI 1:1 (minus a tiny fee). This effectively lets the protocol import USDC's (dollar-backed) stability whenever DAI drifts. The PSM is also the reason DAI's backing now includes a lot of centralized stablecoins — a trade-off that critics see as a retreat from the original decentralization goal.
MKR holders bear the residual risk: if a collateral crash leaves the system undercollateralized, the protocol mints and sells new MKR to recapitalize. MKR is, in effect, the first-loss capital of the system.
The timeline
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Rune Christensen and the early Maker team begin building a stablecoin system on Ethereum. The premise: a dollar-pegged token whose backing is crypto collateral locked in smart contracts — not dollars in a bank account.
The first DAI is minted, backed only by ETH (a "Single-Collateral" system called SAI). The Purple Paper sets out the design for the multi-collateral successor.
MakerDAO migrates to Multi-Collateral DAI (MCD), allowing multiple collateral types (ETH, WBTC, USDC, and eventually real-world assets). The Maker token (MKR) governs parameters: stability fees, collateral ratios, debt ceilings.
ETH crashes ~40% in a day. Liquidation auctions fail because of network congestion and a flaw in the auction mechanics (zero-bid auctions), leaving the system undercollateralized by ~$6.5M. MakerDAO recapitalizes by minting and selling MKR.
DAI becomes the most-used decentralized stablecoin in DeFi — the unit of account for lending, yield farming, and derivatives. Christie’s settles a blockchain-recorded art auction in DAI.
Christensen proposes "Endgame" — splitting MakerDAO into smaller "SubDAOs" and rebranding. The community debates whether the complexity helps or hurts the peg.
MakerDAO begins adding real-world assets as collateral — tokenized US Treasury bill vaults (via Monetalis and Centrifuge), plus a real-world bank loan deal. It is a controversial step away from the founding "no bank accounts" premise, importing yield — and counterparty and censorship risk.
Maker rebrands to "Sky," launching the new USDS stablecoin and SKY governance token alongside legacy DAI and MKR (August–September 2024). The rebrand immediately proves contentious, and governance spends the following period fighting over whether to revert toward the Maker brand.
Black Thursday: the stress test
On March 12, 2020 — “Black Thursday” — ETH fell roughly 40% in 24 hours, triggering a cascade of liquidations. The protocol was supposed to auction off liquidated collateral to repay the DAI. But two things broke simultaneously:
- Ethereum gas prices spiked so high that many keepers (auction bidders) couldn't get transactions through in time.
- The auction mechanic had a flaw: it allowed bids of zero DAI. With few live bidders, some collateral was sold for nothing, leaving the system undercollateralized by about $6.5M.
MakerDAO's response was to mint and sell MKR tokens to cover the shortfall — exactly the recapitalization mechanism the design had promised. MKR holders paid for the bug in dilution. The peg, despite everything, held. The protocol was patched: auctions were shortened, minimum-bid increments were added, and the PSM was later introduced to provide a hard floor on the peg.
Black Thursday is cited both as evidence that the system works (the peg held, the recapitalization mechanism fired) and that it's fragile (the auction flaw, the gas-price dependence, the fact that the “decentralized” stablecoin was rescued in part by adding USDC as a backing asset). Both are true. The lesson is less “DAI is safe” or “DAI is unsafe” than “DeFi mechanisms fail in exactly the correlated, high-volatility moments where you most need them.”
From crypto collateral to real-world assets
In 2022–2023, MakerDAO began allocating reserves into short-term US Treasuries via tokenized vaults (Monetalis and Centrifuge, and later BlockTower), alongside a real-world bank loan deal. At peak, a large share of DAI's backing was real-world yield — a striking evolution for a project whose founding premise was “no bank accounts.”
The pragmatic argument: at 2023–24 rate levels, T-bills paid 4–5% while ETH collateral pays nothing, and the yield funds the protocol and stability fee. The ideological objection: this reintroduces exactly the counterparty and censorship risk that DAI was designed to avoid. If the US government sanctioned a MakerDAO legal entity, the T-bills could be frozen — even if the on-chain DAI cannot be.
Endgame and the governance question
In 2022, Rune Christensen proposed “Endgame” — a reorganization splitting MakerDAO into multiple , with new branded stablecoins and a revised token (NewStable / NewGovToken). The stated goals were scalability and decentralization; the practical effect so far has been complexity and a contested rebrand: in August 2024, MakerDAO began rebranding to “Sky,” launching the new USDS stablecoin and SKY governance token (with legacy DAI and MKR migrating alongside them) — a move the community quickly fought over, with repeated pushes to revert toward the Maker brand. For observers, Endgame is a test of whether a DeFi protocol can evolve its own design without fracturing its community — the same governance question that MakerDAO has been answering since 2014.
DAI vs. the other stablecoins
For a full comparison of DAI against USDT and USDC — the trust models, the backing, the censorship resistance, the failure modes — see the Stablecoin Wars deep dive. The short version: DAI is the only major stablecoin whose peg is held by on-chain collateral and protocol code rather than by a bank account and a company's promise — though a large share of that collateral is itself centralized (USDC and tokenized T-bills), a trade-off the community has accepted. That makes DAI both more resilient to state pressure and more exposed to crypto volatility and smart-contract risk.
Key takeaways
- MakerDAO issues DAI — a dollar-pegged stablecoin backed by crypto collateral locked in a smart contract, not by dollars in a bank. The protocol's parameters are governed by holders of the MKR token, who bear the first-loss risk.
- The peg is held by a stability-fee arbitrage loop and, since 2020, a Peg Stability Module that lets users swap USDC for DAI 1:1. The PSM is also the reason a large share of DAI's backing is now centralized stablecoins — a real trade-off against the decentralization goal.
- On Black Thursday (March 2020), an ETH crash plus a zero-bid auction flaw left the system undercollateralized by ~$6.5M. MKR was minted and sold to recapitalize — the design's own safety valve firing. The peg held; the auction mechanic was fixed.
- Starting in 2022, MakerDAO added T-bills and other real-world assets to its backing, reintroducing the counterparty and censorship risk DAI was built to avoid — in exchange for real-world yield (4–5% at 2023–24 rate levels).
- The “Endgame” reorganization is a live test of whether a mature DeFi protocol can redesign itself without fracturing. For the broader stablecoin landscape, see the Stablecoin Wars deep dive.