A modest price move of roughly 3% in a yield-related token was enough to cascade into tens of millions of dollars in liquidations across Ethereum’s decentralized finance ecosystem. The incident, which took place on the lending protocol Morpho, saw around $36.4 million in positions forcibly closed after the token PT-reUSD lost a small amount of value. While the number of liquidations was significant, the broader fallout was limited, with the underlying asset unaffected and lenders avoiding losses.
What happened
The trigger was a large trade in a token called YT-reUSD, the yield-token component of a Pendle market tied to reUSD, a liquid staking and restaking token. When one wallet bought heavily into YT-reUSD, the price action in that market spilled over into the paired principal token, PT-reUSD. That token is commonly used as collateral in DeFi borrowing markets because it represents principal that can be redeemed at maturity at a known value.
According to on-chain data, the price of PT-reUSD slipped by about 3% during the episode. That seemingly small decline was enough to push many highly leveraged borrowers past their liquidation thresholds on Morpho. The platform, which allows users to borrow assets against a range of collateral, processed roughly $36.4 million in liquidations related to PT-reUSD.
How the leverage built up
The liquidations were not random. They were the result of a common but risky strategy known as a “loop” or “leveraged yield farming.” In this case, borrowers repeatedly used PT-reUSD as collateral to borrow USDC, a stablecoin. They then used that USDC to buy more PT-reUSD, which they deposited as collateral again. Each cycle increased their exposure to PT-reUSD while also increasing their debt in USDC.
This strategy works as long as the price of PT-reUSD remains stable or rises. However, because the borrowed position is backed by the same asset being accumulated, any meaningful drop in the collateral’s price can quickly erode the health of the position. In this instance, the 3% move was enough to push many positions below their required collateralization ratio, triggering automated liquidations.
On-chain analysts noted that the affected borrowers had left themselves with less than 3% protection against liquidation. In other words, their loan-to-value ratios were extremely tight, leaving almost no room for adverse price movements. This type of positioning is often described as “greedy” or “overleveraged,” and it can lead to rapid liquidation cascades when price volatility appears.
The role of Pendle and PT/YT tokens
To understand the event fully, it helps to understand the structure of Pendle, the platform that created PT-reUSD and YT-reUSD. Pendle is a DeFi protocol that allows users to separate a yield-bearing asset into two components: the principal token (PT) and the yield token (YT). The PT represents the right to redeem the underlying asset at a fixed amount upon maturity. The YT represents the right to receive the yield generated by the underlying asset until maturity.
Traders often buy PT when they want a fixed, predictable return. They buy YT when they want to speculate on future yield. By separating these components, Pendle enables more flexible yield trading, but it also introduces new forms of risk, especially when these tokens are used as collateral in lending protocols.
PT-reUSD, as its name implies, is the principal token for a market whose underlying asset is reUSD. reUSD is a relatively new token from the restaking ecosystem, designed to provide a stable value while generating yield through Ethereum staking and restaking mechanisms. Because PT-reUSD matures at a known redemption value, it is often treated as a safer asset than the underlying token. However, its price can still fluctuate in secondary markets, especially when large trades occur.
In this case, a single wallet’s aggressive purchase of YT-reUSD indirectly caused PT-reUSD to drop. The exact mechanics are complex, but the result was a temporary imbalance in the market that led to the 3% price decline. That decline, while tiny in many contexts, was catastrophic for borrowers who had built positions with extremely thin safety margins.
Morpho and the liquidation process
Morpho is a decentralized lending protocol that improves upon traditional lending models by matching borrowers and lenders directly through a peer-to-peer layer, while also providing a fallback to main liquidity pools. It is known for its capital efficiency and for allowing users to borrow with a wide range of collateral assets, including PT tokens.
Liquidations on Morpho occur automatically via smart contracts. When a borrower’s collateral ratio falls below the required threshold, the protocol allows liquidators to repay a portion of the debt in exchange for a portion of the collateral, including a penalty fee. This process is designed to keep the protocol solvent and to protect lenders.
The sheer size of the liquidations in this episode—$36.4 million—reflects how much capital had been deployed in these leveraged positions. But the fact that the protocol handled it without major disruption is a testament to the robustness of the liquidation mechanism. Liquidators were able to step in quickly, and the positions were closed without creating bad debt.
Aftermath and market reaction
Following the liquidations, market participants rushed to assess the damage. The price of PT-reUSD stabilized after the initial drop, and the broader DeFi market showed no signs of systemic stress. Analysts noted that the event was largely contained to a small set of borrowers who had taken on excessive leverage.
Pendle, the protocol that powers the PT and YT markets, issued a statement clarifying that the price feed used for PT-reUSD operated as designed. The protocol emphasized that the 3% decline was a genuine market move, not the result of manipulation or a flaw in its oracle infrastructure. This was an important clarification, as oracle-related incidents have historically led to severe losses in DeFi.
Steakhouse Financial, which is involved in managing reUSD-related vaults and markets, also reported that lenders suffered no losses and that no bad debt was created. The underlying reUSD asset was unaffected, meaning the restaking ecosystem did not experience any direct impact. This was reassuring for users who worried that the liquidations might signal deeper problems with the asset or its collateral properties.
Why 3% was enough to trigger $36 million in liquidations
The key takeaway from the event is how fragile highly leveraged positions can be. In traditional finance, a 3% move in a collateral asset rarely causes widespread liquidations because margin requirements are typically 10% or more. In DeFi, however, users can choose their own risk levels, and some choose to operate with just a few percentage points of safety.
When many users employ the same strategy and hold similar collateral, a small price move can trigger a cascade. As one position is liquidated, the sale of collateral can push the price down further, causing more liquidations. This domino effect is well known in DeFi and has been behind several major market events, including the May 2021 crash and various flash crash incidents.
In this case, the cascade was limited because the market was relatively contained. The PT-reUSD market is not as deep as the markets for major assets like WETH or wstETH, so a sharp move can happen quickly, but the pool of leveraged borrowers was also relatively small. Nevertheless, the $36.4 million figure underscores how much capital was at risk.
Lessons for DeFi users
This incident serves as a reminder of the importance of risk management in decentralized finance. While leverage can amplify returns, it also amplifies losses. Borrowers who use looping strategies must understand the liquidation mechanics of the protocols they use and the potential for rapid price swings in even “stable” assets.
It also highlights the interconnectedness of DeFi protocols. A trade on Pendle can have knock-on effects on Morpho, and a price move in a niche token can ripple through the broader ecosystem. The ability to assess these risks requires not only knowledge of individual protocols, but also an understanding of how they interact.
For lenders, the event offers a degree of reassurance. Morpho’s liquidation mechanism protected the lending pools, and no funds were lost. However, the event is also a reminder that no lending protocol is entirely risk-free. If a collateral asset were to drop sharply enough to exceed the buffer provided by liquidation penalties, lenders could face shortfalls. The fact that this did not happen here is positive, but it should not lead to complacency.
The future of yield token collateral
Despite the liquidations, the use of PT tokens as collateral is likely to continue. They offer benefits such as predictable redemption and fixed yields, which are attractive to a range of users. Protocols like Morpho have shown that they can integrate these tokens effectively, and the growing DeFi ecosystem is increasingly embracing yield-bearing collateral.
However, this event may prompt some protocols to tighten their risk parameters. For example, they could require higher collateralization ratios for volatile PT tokens, or impose borrowing caps to limit concentration risk. While such measures might reduce capital efficiency, they could also prevent future liquidations of this scale.
Pendle and Morpho are both sophisticated protocols with active risk management communities. It is likely that they will review the events and consider whether any changes are needed. But for now, the data suggests that the market functioned as intended: prices moved, liquidations occurred, and the system remained solvent.
In the long run, events like this are part of the natural evolution of DeFi. Each incident provides valuable lessons for developers, users, and risk managers. The ability to withstand shocks without systemic failures is a sign of maturity, even when individual traders suffer losses. As the ecosystem continues to grow, such stress tests are inevitable, and the industry must remain vigilant in building more resilient infrastructure.
Source: Coindesk News