REITs Trigger Fed Warning as Kain Tops $100 Billion: Mortgages

Gary Kain spent 20 years at Freddie Mac managing as much as $800 billion of bonds before the U.S. took over the company. Since 2009, he’s used his knowledge of the home-loan market to help turn American Capital Agency Corp. into the fastest growing mortgage debt investor.

American Capital’s assets grew to $100.5 billion at the end of last year from less than $5 billion three years earlier, making the Bethesda, Maryland-based real estate investment trust the largest after Annaly Capital Management Inc., in an industry that’s drawing attention from investors and the Federal Reserve for its double-digit yields and rapid expansion.