The emergence of JPM Coin by JPMorgan Chase highlights the growing significance of stablecoins in the blockchain ecosystem. Stablecoins are poised to become a major catalyst for real-world blockchain adoption. For those without a background in economics or finance, grasping the mechanics of DAI can be challenging. This article breaks down the core concepts in an accessible manner.
Why Stablecoins Are Necessary
A currency with highly volatile value cannot effectively serve as a medium for daily payments or transactions. Individuals and businesses cannot risk receiving payment in a currency that may lose a third of its value overnight.
Stablecoins offer a solution for maintaining value stability without exiting the cryptocurrency market. They are particularly useful during periods of high market volatility.
Most stablecoins are issued through asset-backed mechanisms. For example, USDT and TUSD are backed by US dollar reserves—issuing one token for each dollar held. This method anchors the stablecoin’s value to a fiat currency.
USDT has often faced scrutiny due to lack of transparency in audits. Concerns about over-issuance (e.g., creating 1.5 billion USDT against only 1 billion USD in reserves) have led to growing preference for regulated alternatives like TUSD and GUSD.
DAI, the subject of this article, is also asset-backed. However, it is uniquely backed by digital assets and issued in a decentralized manner. These characteristics are enabled by the Maker smart contract system, developed by MakerDAO.
Currently, Maker only accepts ETH as collateral, though other tokens may be added in the future.
DAO stands for Decentralized Autonomous Organization.
Given the volatility of digital assets, how does Maker ensure that 1 DAI consistently equals 1 USD?
How the DAI Stablecoin Is Issued
The Maker system includes a smart contract known as a Collateralized Debt Position (CDP). When users lock ETH into this contract, it calculates a discounted value based on the current market price of ETH and issues a corresponding amount of DAI—an ERC-20 standard token.
Maker uses a centralized oracle system to gather ETH prices from major exchanges and compute a weighted average.
To draw an analogy: think of mortgaging a house to secure a loan. Here, ETH is the house, the smart contract is the bank, and DAI is the loan amount. Just as a bank applies a discount to the appraised value of a house, Maker applies a collateralization ratio.
Mathematically, the collateralization ratio is defined as: Collateralization Ratio = Value of Collateral / Value of Loan
If a house is worth $2 million and the collateralization ratio is 200%, the bank will issue a loan of $1 million. Similarly, if 1 ETH is worth $200 and the ratio is 200%, locking 1 ETH into the CDP contract allows the user to generate 100 DAI.
When generating DAI, the contract creates a CDP debt record that tracks the loan amount and terms. The locked ETH remains secured in the contract until the borrowed DAI (plus fees) is repaid—much like a bank holding the property title until the mortgage is fully paid.
Hedging and Liquidity
The CDP mechanism offers a powerful tool for hedging and liquidity. If you hold a significant amount of ETH and need cash, generating DAI against your ETH allows you to access funds without selling your assets. This is especially advantageous if you believe the value of ETH will rise.
For example:
At an ETH price of $130 and a 200% collateralization ratio, locking 1,000 ETH allows you to generate 65,000 DAI ($65,000). If the price of ETH later rises to $500, you can repay the 65,000 DAI (plus interest) to reclaim your 1,000 ETH—now worth $500,000.
How DAI Maintains Its Stability
While fiat-backed stablecoins like USDT rely on centralized reserves, DAI maintains stability through algorithmic mechanisms and over-collateralization.
If the value of ETH increases, the collateralization ratio rises, making the system more secure. If DAI trades above $1, the system incentivizes users to generate more DAI (via the Target Rate Feedback Mechanism).
Target Rate Feedback Mechanism (TRFM): This mechanism encourages generating DAI when its price exceeds $1 and buying back DAI when it falls below $1.
If the value of ETH declines, the system becomes more complex. Using the housing analogy: if the value of the house falls, the bank may require the borrower to add more collateral or repay part of the loan. Similarly, Maker requires continuous over-collateralization.
If the collateral value falls below a threshold (e.g., 150% collateralization) and the user does not add more ETH or repay DAI, the contract triggers liquidation. The locked ETH is auctioned off to repay the outstanding DAI.
In the housing example: a $2 million house with a 200% ratio secures a $1 million loan. If the house value drops to $1.5 million, the bank may foreclose and auction it. Maker uses a similar process to buy back DAI from the market and repay the CDP.
Key takeaway:
Maker always requires over-collateralization. The system monitors risk levels and liquidates under-collateralized CDPs to maintain stability. Users can avoid liquidation by adding more ETH or repaying DAI to keep the collateralization ratio above the safe threshold.
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The Liquidation Process
A few important points about liquidation:
- Once liquidation occurs, users cannot retrieve their collateral by repaying DAI. The CDP is closed.
- A liquidation penalty (currently 13%) and fees are applied.
- DAI obtained from the auction is burned (similar to when users repay DAI).
- Any remaining collateral after repayment is returned to the user.
- A dedicated smart contract handles liquidations.
The Role of MKR in Extreme Market Conditions
The above mechanisms assume that DAI remains over-collateralized. But if ETH experiences a rapid and extreme drop in value, the collateral may become insufficient to cover the outstanding DAI. In such cases, MKR token holders bear the responsibility of recapitalizing the system.
MKR is the governance and recapitalization token of the Maker system. MKR holders benefit from system revenues (e.g., interest and penalties) but also assume risks during shortfalls.
In the housing analogy: if the house value drops below the loan amount (e.g., from $2 million to $900,000), and the auction fails to cover the loan, the bank uses its own funds to cover the gap. Similarly, MKR is minted and sold to cover system deficits.
Thus, price volatility is not eliminated but transferred. DAI’s stability is collectively maintained by CDP users and MKR holders.
Advanced Applications: Leverage and Hedging
DAI’s over-collaboration mechanism also enables sophisticated financial strategies like leveraged long positions.
If you expect ETH to rise in value, you can use your ETH to generate DAI, use that DAI to buy more ETH, and repeat the process. This can amplify gains—though it also increases risk.
For those new to trading concepts:
Long Positions
Going long means buying an asset expecting its price to rise. Leveraged long positions involve borrowing funds to amplify buying power.
Example: Borrowing 65,000 DAI against 1,000 ETH, using the DAI to buy 500 more ETH at $130. If ETH rises to $200, the 500 ETH are now worth $100,000. Repaying the 65,000 DAI leaves a $35,000 profit.
Short Positions
Going short means selling an asset expecting its price to fall. This can also be done with borrowed assets.
Example: Borrowing 1,000 ETH from an exchange, selling it for $130,000. If ETH falls to $100, buying back 1,000 ETH costs $100,000. Repaying the loan yields a $30,000 profit.
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Frequently Asked Questions
What is the minimum collateralization ratio for DAI?
The minimum ratio is 150%. If your collateral value falls below this threshold, your position may be liquidated.
Can I use other cryptocurrencies besides ETH as collateral?
Initially, only ETH was accepted. The system has since expanded to include other approved assets, though eligibility depends on governance decisions.
How are interest rates determined for DAI loans?
Rates are set by MKR token holders through governance votes. They can be adjusted to encourage DAI generation or redemption based on market conditions.
What happens during a black swan event like a 50% ETH crash in one day?
The system is designed to handle gradual declines. In extreme scenarios, MKR minting and auctions help recapitalize the system, though this may dilute MKR value.
Is DAI truly decentralized?
While the issuance and governance are decentralized, price oracles used for collateral valuation involve trusted entities. Efforts are ongoing to further decentralize these components.
Can I lose my collateral even if I repay the DAI?
No. As long as you repay the borrowed DAI plus accrued fees, your collateral is returned. Losses only occur during liquidation due to under-collateralization.
Conclusion
DAI offers a innovative model for stablecoin issuance—combining decentralized governance, over-collateralization, and algorithmic stability mechanisms. While complex, its design provides robust tools for hedging, liquidity, and leveraged strategies in the cryptocurrency ecosystem.
As blockchain technology evolves, stablecoins like DAI are likely to play an increasingly critical role in bridging traditional finance with decentralized applications.