According to the source, Bitwise and 21Shares submitted amended ETF filings for Solana (SOL) and Ethereum (ETH) that add staking and reduce management fees, affecting fund structure and holding costs for investors, source: Bitwise and 21Shares amended ETF filings. The amendments indicate staking of the underlying assets within the funds and lower expense ratios versus prior drafts, source: Bitwise and 21Shares amended ETF filings. For traders, these changes directly impact expected yield and tracking characteristics relative to non-staking products and are relevant to SOL and ETH spot-ETF flow dynamics and secondary market pricing, source: Bitwise and 21Shares amended ETF filings.