Dynex Capital, Inc. operates as a mortgage real estate investment trust (mREIT), primarily engaging in the leveraged acquisition of various mortgage-backed securities (MBS) within the United States. Its investment portfolio includes both agency and non-agency MBS. Agency MBS are distinguished by a principal payment guarantee from a U.S. government entity or a government-sponsored enterprise (GSE), such as Fannie Mae or Freddie Mac. In contrast, non-agency MBS do not possess this governmental backing. Dynex's holdings specifically encompass residential MBS, commercial MBS (CMBS), and certain CMBS interest-only instruments. For federal income tax purposes, the company holds the designation of a real estate investment trust. This status typically exempts Dynex Capital from federal corporate income tax liabilities, provided it distributes a minimum of 90% of its taxable earnings to its shareholders. Established in 1987, the firm maintains its corporate headquarters in Glen Allen, Virginia.