According to The Block, a digital asset brokerage and research firm K33, new spot altcoin ETFs may be launched in the coming months under the supervision of the US Securities and Exchange Commission (SEC), which is more inclined towards cryptocurrencies. Relevant approvals may give rise to attractive long short strategies. At present, eight issuers have submitted applications for spot Solana (SOL) ETFs, and the SEC also requires them to include pledge content when updating their applications, which may mean that the pledge will become a part of Ethereum and Solana ETFs. In addition, there are ETF applications for cryptocurrency assets such as LTC, XRP, and DOGE. K33 analyst Lunde pointed out that unlike the "gray effect" of early Bitcoin and Ethereum ETFs, Gray Solana Trust has never traded at a discount and has low holding risk; However, Litecoin Trust often trades at a discount, and only two issuers have applied for its ETF, which may face the risk of capital outflow after its launch. Therefore, Lunde believes that after the ETF is launched, the trading strategy of long Solana and short Litecoin is quite attractive, especially if both are listed at the same time.