Jinse Finance reported that Eric Balchunas, Senior ETF Analyst at Bloomberg, posted that Tuttle has just filed a series of single-stock Crypto Blast ETF applications. As I understand it, these ETFs will use a bear call spread strategy on the underlying stocks, while investing the unutilized margin cash into cryptocurrency ETFs tracking bitcoin (BTC), ethereum (ETH), and solana (SOL), thereby achieving an "explosive" (return effect).