ARMOUR Residential REIT is a real estate investment trust. Co. invests in mortgage backed securities, issued or guaranteed by a U.S. Government-sponsored entity, such as the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, or a government agency such as Government National Mortgage Administration (collectively, Agency Securities). Co.'s Agency Securities consist primarily of fixed rate loans. The remaining are either backed by hybrid adjustable rate or adjustable rate loans. Co. also invests in Credit Risk and Non-Agency Securities, Interest-Only Securities, U.S. Treasury Securities and money market instruments.