How Stablecoins Maintain Their One-Dollar Peg

Digital Finance
โดย The Block·Read original
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An analysis from The Block explains the mechanisms stablecoins use to keep their price pegged at one US dollar. These include reserve assets or collateral that provide underlying value, and arbitrage processes that pull the market price back to the target when deviations occur. Centralized stablecoins like USDT and USDC are backed one-to-one by cash and cash equivalents and allow direct redemption. Crypto-collateralized stablecoins such as DAI use over-collateralization in smart contracts to cushion volatility. Algorithmic stablecoins like TerraUSD, which collapsed in 2022, relied on code-based incentives without reserve assets. Synthetic stablecoins like Ethena's USDe maintain their peg through hedged short futures positions that create price neutrality. Major past depeg events highlight the weaknesses of each mechanism: USDC fell to 0.87 dollars in March 2023 when 3.3 billion dollars in reserves were frozen at Silicon Valley Bank, and the collapse of UST wiped out over 18 billion dollars in market value. The US GENIUS Act, signed in July 2025, requires payment stablecoin issuers to back tokens one-to-one with cash and equivalents, disclose reserve holdings monthly, and redeem on demand, but it does not address risks from mechanisms beyond fiat backing.

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