Strategy’s STRC preferred stock has become the largest holding in three major U.S. preferred stock ETFs, which collectively own $756 million of the security even as its price remains about 13% below its $100 par value. Michael Saylor, Strategy’s co-founder…

Michael Saylor’s Strategy has joined eight financial firms in pledging $15 million over three years to protect Bitcoin, starting with preparations for potential quantum-computing threats. Strategy announced the Bitcoin Security Consortium in a press release, naming Anchorage Digital, ARK Invest,…