Tell me about SOL's first pledged ETF product, SSK The first Solana pledged exchange traded fund (ETF) in the United States attracted $12 million in capital inflows at the end of its first trading day According to Bloomberg ETF analyst Eric Balchunas, the REX Osprey Solana Staking ETF made its debut on the Cboe BZX exchange on Wednesday, with a trading volume of $33 million and an inflow of $12 million It is worth noting that there are significant differences between SSK and traditional ETFs, as traditional ETFs are still waiting for SEC approval What is the specific difference between the two? SSK mainly helps users invest in Solana (SOL) and obtain staking income, using a legal framework called the 1940 Act. You can understand it as a full-time butler. This butler (fund manager) is very professional and subject to the strictest supervision by the US Securities and Exchange Commission (SEC). He reports every day on what he has bought and sold, with extremely high transparency. The SEC was very confident about this model, so it was quickly approved. It will directly pay you the interest earned from pledging every month, just like paying a salary. Due to its good service and strict supervision, the management fee is very expensive (1.40%), which is currently the most expensive among ETFs. In the traditional sense, a pledged ETF adds a "pledged interest collection" function to the existing spot ETF. But this idea was put on hold by the SEC, which used the legal framework of the 1933 Act. You can understand it as a bank safe, whose main function is to "safeguard" assets (such as gold, Bitcoin, Ethereum) and does not generate any business activities. The SEC believes that pledging is not just about custody, but rather a business activity. It's like your safe suddenly starting its own business to make money. This goes beyond the original definition of a "safe". The SEC needs to re-examine risks and develop new rules, so if it is not approved, it is likely that the earned interest will be reinvested (interest rolling), or you may choose between cash or continued investment.