How MicroStrategy (MSTR) ETFs Are Pushing Prime Brokers to Their Limits 1 min read 6 months ago bitnews Last month’s surge in MicroStrategy ($MSTR) shares created headaches for Matt Tuttle, who runs the T-Rex 2X Long MSTR Daily Target ETF ($MSTU). Acc… Source: TipRanks Tags: Bitcoin Market News MSTR MSTU MSTX