When the Peg Breaks on One Exchange: Venue-Isolated Stablecoin Depegs and the Oracle Feedback Loop

On October 10, 2025, the largest forced deleveraging event in cryptocurrency history triggered over $19 billion in liquidations across centralized and decentralized venues. During the cascade, Ethena's synthetic dollar USDe dropped to $0.65 on Binance-a 35% depeg-while simultaneously trading near $0.99 on decentralized venues such as Curve and Uniswap. Using 1-minute candle data from Binance's public API (4,321 candles across the event window), we document that this was not a global stablecoin failure but a venue-isolated depeg driven by a reflexive oracle feedback loop: Binance's pricing oracle referenced its own illiquid order book rather than deeper external pools, causing forced liquidations that further drained liquidity, which further depressed the oracle price.

We show that during the same 12-hour window, USDC and FDUSD on the same exchange experienced maximum deviations of only 1.5% and 2.0% respectively-stablecoins with direct mint/redeem access on Binance maintained their pegs under identical stress. The depeg lasted 95 minutes below $0.99 and 53 minutes below $0.95. Despite the protocol remaining fully collateralized throughout (confirmed by independent attestors), USDe's circulating supply fell from $14.7 billion to $6.4 billion over the following two months.

The Binance depeg served as a coordination focal point for deleveraging, producing economic consequences of similar magnitude to an actual collateral crisis despite the protocol's technical soundness. We argue that stablecoin "stability" is not solely a property of collateral design but depends critically on the microstructure of the venues where the asset trades, and that oracle architecture is a first-order determinant of peg resilience.