Yearn raises Fluid risk score to Medium over sUSDai and LayerZero concerns

Yearn's risk team upgraded Fluid from a 1.4 (Minimal) to a 2.6 (Medium) risk level, publishing a detailed breakdown of the drivers behind the change.

• The core concern is sUSDai, a synthetic dollar backed by AI-hardware loans issued by USDai. Fluid holds roughly two-thirds of the total sUSDai supply with limited exit liquidity — 24h onchain volume is about 0.2% of market cap and the asset has traded as low as $0.796.
• The concentration was first flagged in April at 19.9%, reached 28.3% in May (prompting a 30% trigger), hit 30.6% on July 6, and now sits at 31.2%.
• sUSDai uses the same LayerZero yield-bearing wrapper pattern as wstUSR, a setup tied to $21M in bad debt on Fluid in March. The sUSDai OAdapter can mint canonical Arbitrum supply, and the 10M/hr limit is outbound-only.
• Collateralization (2.75 → 4.0), Dependencies (2.5 → 4.0) and Provability (1.0 → 2.5) scores all rose, partly because ~37% of lending TVL depends on offchain inputs. Yearn says the full report is public and notes Fluid has responded well since March.