USX decoupling flash crash 90%! Solana stablecoin triggers liquidity crisis

On December 26, Solana stablecoin USX plummeted 90% to $0.1 due to liquidity exhaustion. PeckShield issued an early warning, and after emergency capital injection from Solstice Labs, it rebounded to $0.94. The issuer emphasized that collateral remains above 100%, and primary market redemptions are normal. This de-pegging was not due to a protocol vulnerability but rather market structural liquidity depletion, with Solstice requiring third-party verification.

Liquidity Trap: From $1 to $0.1 in 48 Hours

(Source: Trading View)

On December 26, USX’s liquidity on the secondary market of the Solana network suddenly dried up. According to on-chain monitoring data, USX’s trading price once fell to $0.10, then rebounded somewhat. Due to the rapid and large price decline, the event quickly attracted widespread attention in the cryptocurrency market. Security firm PeckShieldAlert issued an early warning of this de-pegging event, noting that USX’s price significantly deviated from the $1 target.

Monitoring data shows that USX’s liquidity on secondary trading venues rapidly declined. As liquidity decreased, selling pressure sharply pushed down the price. USX’s price bottomed near $0.10, far below its intended peg. This de-pegging was not caused by protocol bugs or collateral failure but driven by market structural pressures, with insufficient liquidity exacerbating price volatility. Such events are more common in markets with scarce or dispersed liquidity. When liquidity providers withdraw simultaneously, even small sell orders can cause extreme price swings.

This flash crash pattern is not unique in DeFi history. In 2022, USDe on Binance fell to $0.65, and in 2021, the algorithmic stablecoin IRON from IRON Finance collapsed from $1 to $0 within hours. Common features include liquidity exhaustion leading to failure of price discovery mechanisms, where a few trades can cause extreme prices. USX dropping to $0.1 means that even a $100,000 sell order, in the absence of buy-side support, can break the price through.

Solstice Emergency Rescue and Collateral Truth

After the price drop, USX’s issuer Solstice immediately intervened to restore market stability. The Solstice team confirmed that shortly after the event, they injected new liquidity into the secondary market. Following the intervention, USX’s price rebounded to about $0.94. Although still below parity, this marked a rapid recovery from the intraday low. Solstice stated that this incident was limited to secondary market trading. According to the team, primary market trading functions remained normal throughout the event.

Three Core Claims of Solstice’s Official Response

Adequate Collateral: USX assets maintained over 100% collateralization, with net asset value unaffected, and no custodial assets damaged.

Normal Redemptions: 1:1 redemptions in the primary market were fully available during market volatility, allowing users to exit at net asset value at any time.

Third-party Certification: An independent auditing firm has been requested to conduct additional verification, with transparent reports to be published upon completion.

Solstice emphasized that no custodial assets were harmed. The company described this event as a liquidity mismatch rather than a solvency issue. This distinction is crucial: solvency issues imply insufficient collateral to support the circulating supply, representing a systemic risk; liquidity mismatch means assets are sufficient but cannot be liquidated promptly or the market lacks buyers, which is a temporary market structural problem.

PeckShield regards the de-pegging as a failure of market structural liquidity. This qualitative view supports Solstice’s explanation but also raises questions: why did liquidity suddenly dry up? Possible reasons include: large liquidity providers withdrawing from Solana DeFi; market depth generally reduced during the Christmas holiday; USX itself has low notoriety, with insufficient market maker allocation; or panic sentiment causing multiple liquidity providers to withdraw simultaneously.

Systemic Risk Warnings in Stablecoin De-pegging

The USX incident highlights ongoing risks in the expanding stablecoin sector. Even without collateral issues, secondary market dynamics can quickly break the price peg during liquidity shortages. Traders point out that extreme price swings bring both risks and opportunities. Some traders bought at $0.1 and quickly gained 840% returns (from $0.1 to $0.94). However, such extreme volatility can also cause users unable to exit in time to face sudden losses.

As more projects launch stablecoins on different blockchains, analysts expect similar events to occur. Lack of liquidity, dispersed trading venues, and rapid market sentiment swings can combine to cause peg failures, even temporarily. The brief collapse of USX underscores a key lesson: stablecoins depend not only on collateral but also on continuous and sufficient liquidity. Without both, even on mainstream networks like Solana, price stability can be shattered within minutes.

For stablecoin users, this event offers important insights. First, do not consider all stablecoins risk-free; even projects claiming 100% collateral can temporarily collapse during liquidity crises. Second, small stablecoins often have limited market depth, making them more vulnerable to extreme prices under market pressure. Third, during holidays like Christmas, market liquidity generally declines, increasing risks for holding small stablecoins. Fourth, primary market redemptions are available, but when thousands redeem simultaneously, congestion or delays may occur, and secondary market sales tend to be faster but at worse prices.