Arlington Asset Investment Corp. is a principal investment firm. The Company acquires and holds a levered portfolio of residential mortgage-backed securities (MBS), consisting of agency MBS and private-label MBS. The Company may invest in other types of residential mortgage assets, such as residential mortgage loans, mortgage servicing rights and government sponsored enterprise (GSE) credit risk transfer securities, as well as other types of assets, including commercial MBS, asset backed securities, other structured securities, commercial mortgage loans, commercial loans, and other real estate-related loans and securities. The Company's Agency MBS include residential mortgage pass-through certificates for which the principal and interest payments are guaranteed by a United States Government agency or GSE, such as the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation. Its subsidiary is Rosslyn REIT Trust, which is a real estate investment trust.