Capstead Mortgage Corporation (Capstead) operates as a self-managed real estate investment trust (REIT). Capstead earns income from investing in a leveraged portfolio of residential mortgage pass-through securities consisting almost exclusively of adjustable-rate mortgage (ARM) securities issued and guaranteed by government-sponsored enterprises, either Federal National Mortgage Association (Fannie Mae) or Federal Home Loan Mortgage Corporation (Freddie Mac) (together, the government-sponsored enterprises (GSEs)), or by an agency of the federal government, Government National Mortgage Association (Ginnie Mae). Capstead’s investment strategy focuses on managing a portfolio of residential mortgage investments consisting almost exclusively of ARM Agency Securities. As of December 31, 2012, the Company’s securities consisted of Agency Securities classified as available-for-sale and Residential mortgage securities classified as held-to-maturity.