Fidelity plans to add Ethereum staking and quarterly cash payouts to its $898 million Fidelity Ethereum Fund.FETH could stake up to 100% of its ETH under normal conditions while keeping enough ether available for liquidity needs.The fund would retain 85% of gross staking rewards, with the remaining 15% going to the sponsor, custodians and node operators.Net staking rewards would first cover fund expenses before being distributed to shareholders in quarterly cash payments.