The same vulnerability can affect multiple protocols at once, and DeFi insurance pools could be wiped out. This isn't just a guess—it's one of the key risk scenarios when evaluating Nexus Mutual.
Pool Size Doesn't Match Risk Exposure
Nexus Mutual manages a pool of around $150 million, but total DeFi locked assets reach hundreds of billions of dollars. In April 2026 alone, DeFi security losses exceeded $600 million, while Nexus Mutual's total claims paid over seven years are just over $18 million. That means a single large-scale correlated attack could create claims far beyond what the pool can cover.
Correlated Risks Are the Core Problem
Traditional insurance works because risks are independent—one house fire doesn't cause all others to burn down. DeFi is the opposite. Events like oracle failures, cross-chain bridge bugs, or shared library vulnerabilities can cascade across every protocol and pool depending on the same infrastructure. When USDC depegged in March 2023, all protocols using USDC as collateral were hit at once. After Euler Finance lost $197 million, Angle Protocol lost $17 million because it held Euler liquidity tokens, and Yield Protocol had to shut down operations.
Scenario: What If 5+ Protocols Are Hit Hard
According to industry risk reports, if the same vulnerability hits more than 5 insured protocols at once, the pool could be drained instantly and claim payouts might be cut to just 50–70 cents on the dollar. This correlated risk isn't just theory—Nexus Mutual recently handled several claims all linked to the same systemic event. The 2025 Stream Finance collapse triggered losses across multiple protocols, including several vaults on Beefy and Harvest Finance. One underlying risk tore through policies on different products.
Risk alert: Claims at Nexus Mutual are assessed by member token holders or a professional claims committee. Members who vote to approve a claim put their own capital at risk, which naturally creates a bias against paying out. If a massive correlated attack happens and the pool can't fully cover all claims, this decision-making mechanism could further reduce the actual payout ratio.
Common Reason for Failure
Many people treat DeFi insurance as "buy it and relax," but they don't realize the insurance pool is simply a pot of money collected from stakers—sharing the same infrastructure risk as the protocols it insures. When a systemic vulnerability explodes across DeFi, both the protocols and the insurance pool get hit by the same shockwave.
What to Do Next
If you do need coverage, check the "available capacity" for that protocol on the insurance platform, not the total pool size. If the available amount is clearly smaller than your position, it means the pool has limited ability to withstand a large correlated loss. Also pay attention to the policy terms: a 5% deductible and a 14-day claim waiting period—these thresholds will affect how much you actually get back during a systemic event.
