Long-Term U.S. Government Bond 

Fund Overview
Adviser: Mason Street Advisors, LLC
Sub-adviser: Pacific Investment Management Company LLC
Objective/Focus: Normally invests at least 80% of its net assets in a diversified portfolio of fixed income securities that are issued or guaranteed by the U.S. Government, its agencies or government-sponsored enterprises and derivatives designed to replicate such securities. The objective is to seek maximum total return, consistent with preservation of capital and prudent investment management.
Asset Class: Bond
Style: High Credit Quality, Extensive Interest Rate Sensitivity
Return of principal is not guaranteed. Bond funds have the same interest rate, inflation and credit risks that are associated with the underlying bonds owned by the Fund. When interest rates rise, bond prices fall. With a fixed income fund, when interest rates rise, the value of the fund's existing bonds drops, which could negatively affect overall fund performance.

The Portfolio may use derivative instruments as part of it investment strategy. Use of these instruments may involve certain risks such as leverage risk, liquidity risk, interest rate risk, market risk, credit risks, management risk and the risk that the Portfolio could not close out a position when it would be more advantageous to do so. Portfolios investing in derivatives could lose more than the principal amount invested in those instruments.

The potential leverage created by use of derivatives may cause the Portfolio to be more sensitive to interest rate movements and thus more volatile than other long-term U.S. government bond funds that do not use derivatives.
Fund Facts as of 12/31/13
Fund Inception 04-30-2007
First Available for Variable Annuity 04-30-2007
First Available for Variable Life 06-30-2011
Net Assets $87.63 Million
Top 10 Portfolio Holdings % of Market Value
US Treasury, Various 47.6%
Residual Funding Stripped, Various 3.8%
Federal National Mortgage Association, Various 3.7%
Financing Corp., Various 1.8%
Israel Government AID Bond, Various 1.6%
Federal Home Loan Mortgage Corp., Series 4092, Class AY, 3.00%, 8/15/32 1.4%
Federal Home Loan Mortgage Corp., Series 2752, Class EZ, 5.50%, 2/15/34 0.7%
Vessel Management Services, Inc., 3.432%, 8/15/36 0.5%
Tennessee Valley Authority, Various 0.4%
Federal Home Loan Mortgage Corp., Series 3203, Class ZW, 5.00%, 11/15/35 0.3%
Total % of Market Value 61.8%
Download Publicly Disclosed Holdings
Sector Weightings % of Equities
Government/Government Agencies 96.6%
Structured Products (MBS & ABS) 3.2%
Cash & Equivalents 0.1%
Municipal Bonds 0.1%

You should carefully consider the investment objectives, risks, expenses and charges of the investment company before you invest. Your Northwestern Mutual Investment Services Registered Representative can provide you with a contract and fund prospectus that will contain the information noted above, and other important information that you should read carefully before you invest or send money.

Mason Street Advisors, LLC (MSA), a wholly owned company of Northwestern Mutual, is a federally registered investment adviser. MSA is the principal investment adviser for all the Portfolios in the Northwestern Mutual Series Fund (Series Fund). MSA has engaged and oversees sub-advisers who provide day-to-day management for certain of the Series Fund Portfolios. Each sub-adviser may be replaced without the approval of shareholders. Please see the prospectus for more information.

All securities are offered through Northwestern Mutual Investment Services LLC, (NMIS), Subsidiary of Northwestern Mutual and member FINRA and SIPC.