Michael Saylor's Strategy jumps as the company says it bought more bitcoin

What happened: Strategy (MSTR) stock rose more than 7% pre-market Monday after the bitcoin holding company disclosed it bought more of the token and repurchased preferred stock last week. (MSTR ) Go deeper with AlphaSpace 168.04 +14.12 (+9.17%) As of 9:50:18 AM EDT. Market Open. MSTRCOIN BTC-USD The move pushed Strategy stock back into positive territory for the year—up about 1% since January—underscoring a major reversal after a number of tough months for the bitcoin holding giant. What's behind the move: Strategy (MSTR) bought 950 bitcoin and repurchased about 1.77 million of its preferred stock (STRC) last week, it said in a Monday 8-K filing. The bitcoin juggernaut also used another $57.