CYS Investments, Inc. (NYSE: CYS) (the "Company") today announced that it plans to make a public offering of 30,000,000 shares of its common stock. The Company also plans to grant the underwriters an option for 30 days to purchase up to an additional 4,500,000 shares of common stock. Barclays Capital Inc., BofA Merrill Lynch, Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and UBS Securities LLC are joint bookrunners for the offering. The Company intends to use the net proceeds of the offering to invest in Agency RMBS and for general corporate purposes. The offering will be made pursuant to the Company's existing shelf registration statement previously filed with the Securities and Exchange Commission that became effective upon filing. This press release is neither an offer to sell nor a solicitation of an offer to buy shares of common stock. The offering of these securities will be made only by means of a prospectus and a related prospectus supplement, a copy of which may be obtained by contacting: Barclays Capital Inc.c/o Broadridge Financial Solutions1155 Long Island AvenueEdgewood, NY 11717Email: email@example.comTelephone: (888) 603-5847 BofA Merrill LynchAttention: Prospectus Department222 Broadway, 7 th FloorNew York, NY 10038Email: firstname.lastname@example.org Credit Suisse Securities (USA) LLCAttention: Prospectus DepartmentOne Madison AvenueNew York, NY 10010Telephone: (800) 221-1037 email@example.com Deutsche Bank Securities Inc.Attention: Prospectus Department60 Wall StreetNew York, NY 10005-2836Email: prospectus.CPDG@db.comTelephone: (800) 503-4611 UBS Securities LLCAttention: Prospectus Department299 Park AvenueNew York, NY 10171Telephone: (888) 827-7275 The prospectus supplement and the accompanying prospectus shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.