MID-CAP INDEX ACCOUNT

Following is a summary of information about the Sentry Mid Cap Index Account. Investors are advised to learn key data about an investment prior to making any investment decision.

Objective

The objective of this account is to seek long-term growth. It is invested solely in the Vanguard® Extended Market Index Fund.

Investor Profile

The Mid-Cap Index Account may be suitable for investors with a very long-term investment horizon who are seeking long-term growth and a simple way to invest in a very broadly diversified group of mid- and small-capitalization stocks. Individuals must be willing and able to accept substantial change in unit price in the short, long and very long term.

Investment Strategy

The Vanguard Extended Market Index Fund employs a "passive management" - or indexing - investment approach designed to track the performance of the S&P Transitional Completion Index, a broadly diversified index of small and medium-size U.S. companies. The fund holds a range of securities that, in the aggregate, approximate the full index in terms of key characteristics. These key characteristics include industry weightings and market capitalization, as well as certain financial measures, such as price/earnings ratio and dividend yield.

Investment Considerations

The Mid-Cap Index Account takes a passive/index approach to investing in companies with medium and small capitalizations. This account can be used by investors seeking to diversify a portion of their retirement planning account into the mid and small cap market place with a passive/index (as opposed to an active) management strategy.

PORTFOLIO DATA

Asset Allocation (as of 12-31-2009)     Stocks 99.80% Short-term Reserves 0.20%   Key Facts (as of 12-31-2009)     Number of Stocks 3,012 Price/Earnings Ratio 301.7x Turnover Rate (Fiscal Year End December) 13.3 Foreign Holdings .4 Beta 3 year trailing (vs. Dow U.S. Total Stock Market Index) 1.18   Top Ten Stock Holdings (as of 12-31-2009) Concentration   Range   Crown Castle International Corp. 0 %     The Mosaic Co. 0 %     Delta Air Lines Inc. 0 %     Bunge, Ltd. 0 %     Vertex Pharmaceuticals Inc. 0 %     Discovery Communications Inc. Class A 0 %     BlackRock Inc. 0 %     Ultra Petroleum Corp. 0 %     PetroHawk Energy Corp. 0 %     Newfield Exploration 0 %     Top Ten Equals 4.0% of Portfolio   Top Sectors (as of 12-31-2009)       Financials 18.30 % Information Technology 16.00 % Industrials 15.00 % Consumer Discretionary 13.80 % Health Care 12.80 % Energy 7.20 % Materials 6.40 % Utilities 4.90 % Consumer Staples 3.60 % Telecommunication Services 2.00 % Total 100.00 % Vanguard Extended Market Index Fund* Average Annual Returns Annual Total Returns (as of 02-28-2010) (as of 12-31)           1 Month 4.78%     3 Months 8.76%     YTD 1.25%     1 year 69.08%     3 years (4.79)%     5 years 2.63%     10 years 0.52%                                     1994       (1.76)%     1995       33.80%     1996       17.65%     1997       26.73%     1998       8.32%     1999       36.22%     2000       (15.55)%     2001       (9.13)%     2002       (18.06)%     2003       43.43%     2004       18.71%     2005       10.29%     2006       14.27%     2007       4.33%     2008       (38.73)%     2009       37.43%