Key Highlights

  • Ethereum co-founder Vitalik Buterin published a proposal on June 1 arguing that options contracts should replace collateralized debt positions and forced liquidations as the base primitive for DeFi synthetic assets.

  • In the proposed design, one ETH is split into two paired option assets that always sum back to one ETH, with a user's price exposure drifting quadratically rather than triggering sharp binary liquidations, and the system able to run on slow oracles with extended dispute windows.

  • Buterin acknowledged that rebalancing slippage and gas costs on Ethereum mainnet represent significant practical tradeoffs, particularly for smaller positions that rebalance frequently.

Ethereum co-founder Vitalik Buterin published a detailed proposal on June 1 calling for a fundamental redesign of DeFi synthetic assets, arguing that options contracts should replace the collateralized debt positions and forced liquidations that currently define most lending and synthetic asset protocols. The proposal targets what Buterin describes as a structural vulnerability in existing designs: their dependency on real-time price oracles that must provide instantaneous, binding valuations to trigger liquidations whenever collateral falls below a threshold.

In Buterin's model, one ETH is split into two paired option assets that, regardless of the underlying price movement, always sum back to one ETH in total value. This structure eliminates the need for collateralized debt positions and removes forced liquidation events entirely. Instead of a sharp binary event where a position is liquidated the moment collateral dips below a ratio, a user's exposure to the price index drifts quadratically as the asset moves toward the strike price, providing a much smoother risk curve. Critically, the design can operate on a "slow oracle": the kind prediction markets already use, which allows for extended dispute windows and human recourse in the event of manipulation rather than demanding a real-time binding price feed.

The oracle reliability problem is not purely theoretical. A manipulation of a Polymarket weather sensor market in April 2026 demonstrated how a single compromised data source can be exploited when a real-time price feed controls financial outcomes. Slow oracles with dispute windows and human oversight are structurally harder to game within the timeframe of a single transaction or block, which is precisely what Buterin's design leverages.

Buterin acknowledged that the design is not without tradeoffs. Options-based positions tied to indices require periodic rebalancing, and every rebalance executes a trade. On the Ethereum mainnet, gas costs and rebalancing slippage can erode returns meaningfully, particularly for smaller positions or in high-frequency rebalancing scenarios. The proposal is currently in its conceptual stage, but it adds to a broader ongoing effort within the Ethereum research community to reduce the fragility that forced liquidation mechanisms introduce into DeFi lending protocols.