What happens when a stablecoin depegs for 30 seconds

Most traders assume depegs are slow. They are not. Inside the 30 second window where arbitrage bots, liquidation cascades, and oracle lag collide to turn a minor price slip into a systemic event. Summary A stablecoin depeg lasting fewer than 60 seconds can trigger hundreds of millions of dollars in DeFi liquidations because lending protocols rely on price oracles that update on fixed intervals, not in real time, creating windows where collateral ratios become stale. Arbitrage bots can detect and exploit a depeg within two to three blocks on Ethereum, roughly 24 to 36 seconds, buying discounted stablecoins on one venue and redeeming or selling at par on another, but their speed advantage disappears when the depeg is caused by a solvency question rather than a liquidity imbalance. Chainlink price feeds for major stablecoins use a 0.25 percent deviation threshold and a one hour heartbeat interval, meaning the oracle will not update until the price moves at least 0.25 percent from its last reported value or 3,600 seconds have elapsed, whichever comes first. During the March 2023 USDC depeg caused by Silicon Valley Bank’s failure, approximately $2.1 billion in DeFi liquidations occurred...