Pangea published a detailed postmortem of the OPEN Stablecoin Index Q3 2025 rebalance, concluding that the portfolio ended up around 7.5% away from its target allocation due to a flawed auction-based rebalance mechanism in Reserve Protocol v2.0.0. The analysis shows that the index became overweight in tokens such as OGN and SKY, while being underweight in the rest of the basket, and that the rebalance also suffered avoidable execution losses. According to Pangea, the main drivers were poor price-setting in the auction, absence of MEV protection, and vulnerability to sandwich attacks, which caused some trades to fail and others to be executed at unfavorable prices. Reserve Protocol’s core team acknowledged the issues and is addressing them in the 4.0.0 upgrade, which redesigns how index rebalances are executed. The new version introduces holistic basket-wide rebalancing rather than isolated token pair auctions, routes orders through CoW Swap for MEV‑protected execution via “Trusted Fillers,” and gives managers more granular control over price ranges during rebalances. Community commentary on the Reserve forum additionally emphasizes that low participation in the Q3 rebalance auction allowed bots to extract value from the index, and frames CoW Swap integration as a way to increase competitive participation and reduce the chance of unfair pricing. Taken together, the incident and subsequent upgrade highlight the practical risks in decentralized index design and the importance of robust auction mechanics and execution protection for on-chain portfolio rebalancing.

AI-generated background, compiled from web sources — not editorial content.

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app.reserve.org ·

🔔 A reminder to claim the $SQUILL drop to vote-lock and influence the $OPEN stablecoin index on the Reserve protocol, an equal-weight index tracking leading stablecoin networks for transparency and governance, with a total supply capped at 10 million $SQUILL tokens.

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ABC Labs announces acquisition of 6.5M $sdCRV, giving Reserve Protocol the most voting power of any non-founder entity in the Curve DAO

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