The REX-Osprey Solana + Staking ETF (ticker: SSK), the first-ever staking-enabled cryptocurrency exchange-traded fund in the United States, officially launched for trading on July 2, 2025. The ETF offers investors direct exposure to Solana (SOL) while distributing staking rewards as monthly dividends, providing a novel way to access on-chain yield through traditional financial markets. The fund quickly gained traction, recording over $8 million in trading volume within the first 20 minutes and surpassing $20 million in volume within two hours of its debut. By the end of its first trading day, SSK posted $33 million in volume and $12 million in inflows, outperforming Solana and XRP futures ETFs but trailing behind Bitcoin and Ethereum spot ETFs. On its second day, the ETF continued to show strong demand, reaching $34.4 million in volume and bringing total volume to nearly $70 million since launch. Approximately 80% of the fund's assets are held in spot Solana, with more than half staked to generate on-chain yield. Bloomberg ETF analyst Eric Balchunas highlighted the ETF's strong start, ranking it in the top 1% of new ETF launches by volume. The ETF's unique C-corp structure allows staking rewards to flow directly to investors, marking a milestone for crypto ETFs and potentially signaling growing institutional interest in Solana-based products.