ARK Space ETF Debut, Bond ETF Liquidity, & SPACs’s Drew Voros covers several recent stories including Fidelity’s bitcoin ETF filing, AdvisorShares’ Gerber Kawasaki ETF filing, and ARK’s Space Exploration ETF launch.  MarketAxess’ John Keller explains how they’re automating bond trading and facilitating bond ETF liquidity.  Tuttle Tactical Management’s Matt Tuttle spotlights The SPAC and New Issue ETF (SPCX).