Fund Description Overview GNMA securities have the same credit quality as U.S. Treasury securities but higher yields to compensate for prepayment uncertainty Seeks to deliver attractive income and returns by selecting GNMAs that can better withstand the impacts of changing interest rates and prepayment volatility One of the oldest mortgage-backed securities funds and the one with the longest manager tenure Investment Objective The Fund seeks a high level of current income, consistent with liquidity and safety of principal, through investment primarily in Government National Mortgage Association (GNMA) mortgage-backed securities (also known as GNMA Certificates) that are guaranteed as to the timely payment of principal and interest by the U.S. Government. While the Fund invests in securities guaranteed by the U.S. Government as to timely payments of interest and principal, the Fund shares are not insured or guaranteed. Daily Prices as of 02/08/2010 Net Asset Value (NAV) $8.76 % Change -0.11 $ Change -0.01 Public Offering Price (POP) $8.98 YTD Return +1.61% Lookup Historical Prices Fund Facts Ticker Symbol LEXNX CUSIP 44977C449 Inception Date Aug 17, 1973 Dividends Paid Monthly Min. Initial Investment $1,000 More Info Related Resources Prospectus Fund Fact Sheet Annual Report Semi-Annual Report Complete Portfolio Holdings Portfolio Construction Made Easier

Investment Style More Info Management Team Peter Guan, Ph.D. Portfolio Manager Managed Fund since 2009 Jeff Dutra, CFA Senior Portfolio Manager Managed Fund since 2002 Justin McWhorter, CFA, CPA Portfolio Manager Managed Fund since 2002 View Detailed Information

Average Annual Total Returns %

* Return calculations with a starting date prior to July 31, 2006 are based on a 4.75% sales charge while returns with a starting date on or after July 31, 2006 are based on a 2.50% sales charge.

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Current Maximum Sales Charge: 2.50%

¹ The Adviser has contractually agreed to limit expenses of the Fund. This expense limitation agreement excludes interest, taxes, brokerage, and extraordinary expenses and is subject to possible recoupment. Please see the Fund's prospectus for more information. The expense limits will continue through at least August 1, 2009. The Fund is operating under the contractual expense limits.

Class A Share return calculations with a starting date prior to July 31, 2006 are based on a 4.75% sales charge while returns with a starting date after July 31, 2006 are based on a 2.50% sales charge.

Past performance is no guarantee of future results. The performance quoted represents past performance. Investment return and principal value of an investment will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance data quoted.

SEC fund returns assume the reinvestment of dividends and capital gain distributions and include a sales charge. Net Asset Value fund returns assume the reinvestment of dividends and capital gain distributions. Total return for less than one year is not annualized. Results would have been less favorable if the sales charge were included.