Collateralized Stablecoin
Web3 / cryptocurrency types
A stablecoin that maintains its price peg through overcollateralization with other assets held in reserve, where the value of pledged collateral exceeds the value of stablecoins issued, providing a buffer against collateral price volatility. The overcollateralization requirement distinguishes this category from algorithmic stablecoins, which attempt to maintain pegs through supply adjustment mechanisms, and from fiat-backed stablecoins, which hold 1:1 dollar reserves. In a typical collateralized stablecoin system, users lock collateral in a smart contract and can borrow stablecoins against it up to a maximum loan-to-value ratio; if collateral value falls below the minimum threshold, automated liquidation processes sell the collateral to repay the outstanding stablecoin. DAI was the original and most prominent collateralized stablecoin, but newer designs include protocol-owned collateral models and stablecoins backed by diverse asset portfolios including liquid staking tokens, real-world assets, and other stablecoins. Aave's GHO is an example of a DeFi protocol issuing its own collateralized stablecoin against assets already deposited in its lending markets. Example: Aave launched GHO in July 2023 as an overcollateralized stablecoin minted directly against collateral deposited in the Aave lending protocol. Users with sufficient deposited collateral can mint GHO at a variable borrow rate set by governance, with the interest flowing to the Aave DAO treasury rather than to external lenders, creating a novel revenue stream for the protocol. Why it matters for DeFi: Collateralized stablecoins represent DeFi's most enduring approach to on-chain price stability, having proven viable across multiple market stress tests since DAI's launch in 2017. They allow capital to remain productive within DeFi (collateral earns yield while stablecoins are issued against it) rather than requiring actual dollar reserves held with external custodians, preserving decentralization. The tradeoff is capital inefficiency: overcollateralization locks up more value than it creates in circulating stablecoins.
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