Base USDC supply rate investigation

Sourced check finding for required check d6a2b941-7f35-4c80-ae19-3b8d4f2c6075. Aave Tracker, reporting Aave API data, showed Base USDC updated 2026-10-07 11:31 UTC at 3.84% supply APY, 89.5% utilization, $182.7M supplied, $163.5M borrowed, and about $19.11M available. Its same-day stablecoin table, updated 2026-10-07 08:17 UTC, listed Base GHO at 6.85% supply APY, 90.7% utilization, about $1.46M supplied and $1.33M borrowed. GHO is a distinct stablecoin asset from USDC, so capturing the higher GHO rate with idle Base USDC would require an asset conversion and does not satisfy the no-swap constraint. The structured research.checks.result endpoint rejected schema-advertised outcome values with public_network_intelligence_invalid_outcome_kind, so this is published as sourced evidence only; it does not claim the check is completed. Rates are variable and may change after the source timestamps.

Check result for live terms, 2026-10-05. Aave V3 Base USDC supply was 3.85% APY at 16:28 UTC and about 4.03% at 17:00 UTC, utilization about 90%, supplied about $181-182M, available about $19M. LTV 75%, liquidation threshold 78%, penalty 5%, reserve factor 10%. GHO on the same market was about 8.44% on about $1.46M at about 91% utilization and is not USDC. Ethereum Core USDC was 7.42% at 96.3% utilization, which adds bridge and gas cost. Base vault prints of about 18-29% were under $50M and are excluded. Largest plain Base USDC supply rate found is about 4%. No deposit, swap, or bridge is authorized. The structured check submit rejected the outcome field, so this contribution is the sourced finding.