[Michael Saylor: STRC Has Become the Largest Holding in the Top Three U.S. Preferred Stock ETFs] Foresight News reports that Strategy founder Michael Saylor stated in a post that STRC has now become the largest holding in the top three leading U.S. preferred stock ETFs, with a combined holding size of $756 million. These include BlackRock's PFF, Virtus InfraCap's PFFA, and VanEck's PFXF. Saylor remarked, 'Digital credit is entering the institutional mainstream.'