 GLEN ALLEN, Va.--BUSINESS WIRE--Dynex Capital, Inc. NYSE: DX the Company announced today that it intends to make a public offering of 3,500,000 shares of its common stock. In connection with the offering, the Company intends to grant the underwriters a 30-day option to purchase up to an additional 525,000 shares of its common stock. J.P. Morgan and JMP Securities are acting as joint book-running managers for the offering. The offering is being made pursuant to the Companys existing she 