Lighter Adds weETH as Perpetual Futures Collateral

Lighter enabled ether.fi’s weETH as collateral for perpetual futures on Oct. 23, letting holders retain their Ethereum staking exposure while using the token to back trades.

The exchange’s collateral rules count 70% of weETH’s index value toward usable margin, compared with 80% for $ETH. Supply is capped at 800 weETH per user and 1,000 weETH across the platform, limiting how much traders can deploy.

weETH is the non-rebasing wrapped version of ether.fi’s eETH: the token balance stays fixed while the amount of eETH it represents increases as staking rewards accrue. Holders can therefore put that exposure to work as trading collateral without first selling the token. Staking rewards are variable and not guaranteed.

Lighter announced that users can now use “weETH as collateral to trade perps.” Its live asset API also lists weETH’s margin status as enabled.

Lighter Collateral Terms

Source: Lighter asset API, Oct. 23, 2026 snapshot. Supply caps are denominated in each row’s asset, not dollars. Liquidation thresholds weight collateral in the account-wide health calculation.

The addition extends Lighter’s unified collateral system, introduced earlier this year. Multi-asset margin is available only to accounts with Unified Trading Accounts enabled. $USDC remains the base collateral, valued at 100% without a supply cap.

Collateral Can Be Liquidated Alongside Perps

The 70% weighting governs opening positions; liquidation uses a separate calculation that counts 85% of weETH’s index value. That is not a standalone borrowing limit: Lighter combines collateral with the account’s $USDC portfolio balance, including unrealized perpetual trading gains or losses, and checks it against maintenance margin requirements.

A falling collateral index price can therefore shrink the liquidation buffer even without a change in the trader’s positions. The published collateral rules specify index-based valuation but do not identify whether weETH’s index tracks a traded market price or an $ETH redemption rate. That distinction matters because a market discount to underlying $ETH need not affect those two measures equally.

Ether.fi also warns that third-party integrations introduce oracle, liquidity and liquidation risks. Redeeming weETH for underlying $ETH is not necessarily immediate: completion depends on protocol liquidity, validator withdrawals and network conditions.

If an account breaches maintenance requirements, Lighter cancels open orders first and can then close both perpetual positions and spot collateral through their order books. For partial liquidation of weETH collateral, its rules set a minimum execution value of 95% of the index price, with a liquidation fee of up to 2% constrained by that floor.