Stream Finance Loses $93 Million, Triggers Shockwaves Across DeFi Lending Platforms

Major loss: Just one day after Balancer lost $128 million in a hack, yield-focused DeFi protocol Stream Finance disclosed a $93 million loss tied to one of its external fund managers. In response, the platform suspended all deposits and withdrawals, freezing roughly $90 million in remaining user funds as of now.

• Why it matters: Over the past year and a half, a new wave of modular DeFi platforms like Morpho and Euler turned lending into an open marketplace, where anyone can launch a custom vault, set their own risk rules, and attract deposits. That freedom fueled explosive growth, with total value locked jumping from about $3 billion to over $13.6 billion. Stream Finance’s crash represents the first stress-test for this “vault curator model”.

The trigger: Stream Finance promised depositors up to 18% yield on USDC. To reach that high return, an external fund manager supposedly took the money offchain and used heavy leverage on a delta-neutral strategy. In that case, a sudden market drop potentially wiped out one side before the other could adjust, burning $93 million.

Not-so-stable-coin: That damage landed hardest on xUSD, the yield-bearing stablecoin Stream issued as a deposit receipt. Within hours of the news, panic selling drove it from its $1 peg to around $0.17, where it still trades today.

Bad debt: For lending vaults accepting xUSD as collateral, this became a major problem. Many of them used fixed prices for xUSD — a common setup for tokens representing shares of onchain funds — so the drop in value wasn’t reflected in the system. That meant the collateral looked more valuable than it really was, blocking liquidations and causing losses for lenders. According to estimates by DeFi research group YAM, roughly $285 million in assets are affected.

Bank run: Even vaults untouched by Stream felt the pressure. Fears of wider contagion sparked withdrawals, draining liquidity and pushing borrow rates past 40% in some cases to encourage borrowers to repay loans so that exiting lenders could be paid back.

Who’s to blame? Most point to Stream’s lax risk controls, yet debate swirls around the modular infrastructure itself, especially the permissionless curator system powering Morpho and Euler:

• “Lending only works when people believe the markets are sound […]. Once that trust breaks, you get the onchain version of a bank run. That’s why a model where anyone can spin up a vault permissionlessly and market it on the same platform has built-in weaknesses. Since most strategies are already commoditized, curators don’t have many ways to stand out. They either lower fees to the bone or take on more and more risk to attract capital from other pools,” wrote Stani Kulechov, founder & CEO of leading lending platform Aave.

The other side: Defenders highlight modularity’s strengths, noting that risk varies by design, just like in traditional finance, where some funds perform well while others don’t. Paul Frambot, co-founder and CEO of Morpho, countered:

• "The fact that only 1 out of ~320 vaults on the Morpho App had limited exposure to xUSD isn't evidence that the model doesn't work — quite the opposite. Morpho's isolated market + vault model meant all 319+ other vaults and their depositors, each with different risk profiles, had zero exposure."

Sébastien Dérivaux is the co-founder of Steakhouse Financial, a leading DeFi curator with over $1.5 billion under management and partnerships with traditional players such as Janus Henderson, Apollo, and SG-Forge.

The current debate around modular lending misses the point. Stream Finance did not fail because of infrastructure; it failed because of investor behavior, opacity, and weak risk controls.

The users who lost money were not retail savers. They were crypto-native investors chasing yield in risky vaults. xUSD disclosed little about allocation or the source of returns. That should have been disqualifying. We ran diligence, saw the opacity, and did not interact. Many investors and several curators skipped that step.

This is a maturity problem in the curator layer. Curators sit between neutral infrastructure and capital, yet few run professional playbooks. What the space needs now is professionalization: clear transparency on where funds go, faster automation and monitoring to detect liquidity stress and hidden exposure, and real accountability, for example by curators putting their own capital at stake to show skin in the game, as is standard in traditional hedge funds.