According to Cumberland, staked ether will remain locked until Ethereum Improvement Proposal (EIP)-4788 releases them. That date is not yet known. So, ether stakers, who are exposed to price declines, are likely to sell futures, keeping premiums under check. The popularity of staking depends on yields, and the greater the yield, the stronger the demand for ether staking and selling ether futures.
Source: https://www.coindesk.com/markets/2022/08/24/anomalous-ether-futures-pricing-condition-is-likely-to-revert-after-the-merge/?utm_medium=referral&utm_source=rss&utm_campaign=headlines