REX Shares and Osprey Funds updated their U.S. Securities and Exchange Commission filings for the REX-Osprey SEI + Staking ETF and set Oct. 23 as the product's effective date. The proposed fund is designed to provide exposure to spot SEI price movements while staking SEI held by the fund. The firms are also developing crypto ETF products tied to NEAR, HYPE, SUI and AVAX, and previously launched the SOL+ Staking ETF. SEI rose about 6.4% over 24 hours to trade at $0.07765 following the development.