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<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Investment Objective</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Investment Objective</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Investment Objective</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The fund seeks the highest return consistent with investment in U.S. Treasury securities.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The fund seeks the highest return consistent with investment in U.S. Treasury securities.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The fund seeks the highest return consistent with investment in U.S. Treasury securities.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Fees and Expenses</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Fees and Expenses</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Fees and Expenses</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund.</font></div>
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<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Annual Fund Operating Expenses</font> (expenses that you pay each year as a percentage of the value of your investment)</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Annual Fund Operating Expenses</font> (expenses that you pay each year as a percentage of the value of your investment)</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Annual Fund Operating Expenses</font> (expenses that you pay each year as a percentage of the value of your investment)</font></div>
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<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Example</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Example</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Example</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds. </font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds. </font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds. </font></div>
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<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Portfolio Turnover</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Portfolio Turnover</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Portfolio Turnover</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund's portfolio turnover rate was 40% of the average value of its portfolio.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund's portfolio turnover rate was 47% of the average value of its portfolio.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund's portfolio turnover rate was 73% of the average value of its portfolio.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Principal Investment Strategies</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Principal Investment Strategies</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Principal Investment Strategies</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Under normal circumstances, the fund will invest at least 80% of the value of its assets in zero-coupon securities. Typically, other than during the fund’s target maturity year, the fund intends to exceed this 80% requirement and be fully invested in zero-coupon securities.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The fund invests primarily in zero-coupon U.S. Treasury securities and their equivalents, and may invest up to 20% of its assets in AAA-rated zero-coupon U.S. government agency securities. Zero-coupon securities make no periodic interest or principal payments. Instead, they trade at a deep discount to their face value and all of the interest and principal is paid when the securities mature.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">The fund is managed to mature in the year 2015 and will be liquidated near the end of its target maturity year. If shares of the fund are held until the fund is liquidated and all distributions are reinvested, the fund’s performance should be similar to an investment in a zero-coupon U.S. Treasury security with the same term to maturity as the fund. The advisor expects that shareholders who hold their shares until the fund is liquidated and reinvest all distributions will realize an investment return and maturity value that do not differ significantly from the <font style="font-style: italic; display: inline; font-weight: bold">anticipated growth rate</font> (AGR) and <font style="font-style: italic; display: inline; font-weight: bold">anticipated value at maturity </font>(AVM) calculated on the day the shares were purchased.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="text-align: center">
<div style="text-align: left; text-indent: 0pt; display: block; margin-left: 63pt; margin-right: 0pt"><font style="font: italic 10pt times new roman; display: inline">The fund’s <font style="display: inline; font-family: times new roman; font-weight: bold">anticipated growth rate</font> is an estimate of the annualized rate of growth of the fund that an investor may expect from the purchase date to the fund’s weighted average maturity date.</font> <font style="font: italic 10pt times new roman; display: inline"> </font> </div>
</div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="text-align: center">
<div style="text-align: left; text-indent: 0pt; display: block; margin-left: 63pt; margin-right: 0pt"><font style="font: italic 10pt times new roman; display: inline">The <font style="display: inline; font-family: times new roman; font-weight: bold">anticipated value at maturity</font> is an estimate of the fund’s net asset value as of the fund’s weighted average maturity date. It is based on the maturity values of the zero-coupon securities held by the fund.</font> <font style="font: italic 10pt times new roman; display: inline"> </font> </div>
</div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">As of the fund’s most recent fiscal year end (September 30, 2012), the fund’s Investor Class AGR was -0.05% and its AVM was $114.07. The AGR and AVM for the Advisor Class will differ from that of the Investor Class, depending on the expenses of that class.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">When determining whether to sell a security, the portfolio managers consider, among other things, the fund's average maturity, current and anticipated changes in interest rates, current valuation relative to alternatives in the market, general market conditions and any other factors deemed relevant by the portfolio managers.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Securities issued or guaranteed by the U.S. Treasury and certain U.S. government agencies or instrumentalities are supported by the full faith and credit of the U.S. government. Zero-coupon U.S. government agency securities that are ultimately backed by securities or payment obligations of the U.S. Treasury and are considered by the market to be of comparable credit quality, such as Resolution Funding Corporation (REFCORP) bonds, are considered to be zero-coupon U.S. Treasury equivalents by the fund's managers. Securities issued or guaranteed by other U.S. government agencies or instrumentalities, such as the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), and the Federal Home Loan Bank, are not guaranteed by the U.S. Treasury or supported by the full faith and credit of the U.S. government. However, these agencies or instrumentalities are authorized to borrow from the U.S. Treasury to meet their obligations.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Under normal circumstances, the fund will invest at least 80% of the value of its assets in zero-coupon securities. Typically, other than during the fund’s target maturity year, the fund intends to exceed this 80% requirement and be fully invested in zero-coupon securities.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The fund invests primarily in zero-coupon U.S. Treasury securities and their equivalents, and may invest up to 20% of its assets in AAA-rated zero-coupon U.S. government agency securities. Zero-coupon securities make no periodic interest or principal payments. Instead, they trade at a deep discount to their face value and all of the interest and principal is paid when the securities mature.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">The fund is managed to mature in the year 2020 and will be liquidated near the end of its target maturity year. If shares of the fund are held until the fund is liquidated and all distributions are reinvested, the fund’s performance should be similar to an investment in a zero-coupon U.S. Treasury security with the same term to maturity as the fund. The advisor expects that shareholders who hold their shares until the fund is liquidated and reinvest all distributions will realize an investment return and maturity value that do not differ significantly from the <font style="font-style: italic; display: inline; font-weight: bold">anticipated growth rate</font> (AGR) and <font style="font-style: italic; display: inline; font-weight: bold">anticipated value at maturity</font> (AVM) calculated on the day the shares were purchased.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="text-align: center">
<div style="text-align: left; text-indent: 0pt; display: block; margin-left: 63pt; margin-right: 0pt"><font style="font: italic 10pt times new roman; display: inline">The fund’s <font style="display: inline; font-family: times new roman; font-weight: bold">anticipated growth rate</font> is an estimate of the annualized rate of growth of the fund that an investor may expect from the purchase date to the fund’s weighted average maturity date.</font> <font style="font: italic 10pt times new roman; display: inline"> </font> </div>
</div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="text-align: center">
<div style="text-align: left; text-indent: 0pt; display: block; margin-left: 63pt; margin-right: 0pt"><font style="font: italic 10pt times new roman; display: inline">The <font style="display: inline; font-family: times new roman; font-weight: bold">anticipated value at maturity</font> is an estimate of the fund’s net asset value as of the fund’s weighted average maturity date. It is based on the maturity values of the zero-coupon securities held by the fund.</font> <font style="font: italic 10pt times new roman; display: inline"> </font> </div>
</div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">As of the fund’s most recent fiscal year end (September 30, 2012), the fund’s Investor Class AGR was 1.03% and its AVM was $108.09. The AGR and AVM for the Advisor Class will differ from that of the Investor Class, depending on the expenses of that class.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">When determining whether to sell a security, the portfolio managers consider, among other things, the fund's average maturity, current and anticipated changes in interest rates, current valuation relative to alternatives in the market, general market conditions and any other factors deemed relevant by the portfolio managers.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Securities issued or guaranteed by the U.S. Treasury and certain U.S. government agencies or instrumentalities are supported by the full faith and credit of the U.S. government. Zero-coupon U.S. government agency securities that are ultimately backed by securities or payment obligations of the U.S. Treasury and are considered by the market to be of comparable credit quality, such as Resolution Funding Corporation (REFCORP) bonds, are considered to be zero-coupon U.S. Treasury equivalents by the fund's managers. Securities issued or guaranteed by other U.S. government agencies or instrumentalities, such as the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), and the Federal Home Loan Bank, are not guaranteed by the U.S. Treasury or supported by the full faith and credit of the U.S. government. However, these agencies or instrumentalities are authorized to borrow from the U.S. Treasury to meet their obligations.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Under normal circumstances, the fund will invest at least 80% of the value of its assets in zero-coupon securities. Typically, other than during the fund’s target maturity year, the fund intends to exceed this 80% requirement and be fully invested in zero-coupon securities.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The fund invests primarily in zero-coupon U.S. Treasury securities and their equivalents, and may invest up to 20% of its assets in AAA-rated zero-coupon U.S. government agency securities. Zero-coupon securities make no periodic interest or principal payments. Instead, they trade at a deep discount to their face value and all of the interest and principal is paid when the securities mature.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">The fund is managed to mature in the year 2025 and will be liquidated near the end of its target maturity year. If shares of the fund are held until the fund is liquidated and all distributions are reinvested, the fund’s performance should be similar to an investment in a zero-coupon U.S. Treasury security with the same term to maturity as the fund. The advisor expects that shareholders who hold their shares until the fund is liquidated and reinvest all distributions will realize an investment return and maturity value that do not differ significantly from the <font style="font-style: italic; display: inline; font-weight: bold">anticipated growth rate</font> (AGR) and <font style="font-style: italic; display: inline; font-weight: bold">anticipated value at maturity</font> (AVM) calculated on the day the shares were purchased.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="text-align: center">
<div style="text-align: left; text-indent: 0pt; display: block; margin-left: 63pt; margin-right: 0pt"><font style="font: italic 10pt times new roman; display: inline">The fund’s <font style="display: inline; font-family: times new roman; font-weight: bold">anticipated growth rate</font> is an estimate of the annualized rate of growth of the fund that an investor may expect from the purchase date to the fund’s weighted average maturity date.</font> <font style="font: italic 10pt times new roman; display: inline"> </font> </div>
</div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="text-align: center">
<div style="text-align: left; text-indent: 0pt; display: block; margin-left: 63pt; margin-right: 0pt"><font style="font: italic 10pt times new roman; display: inline">The <font style="display: inline; font-family: times new roman; font-weight: bold">anticipated value at maturity</font> is an estimate of the fund’s net asset value as of the fund’s weighted average maturity date. It is based on the maturity values of the zero-coupon securities held by the fund.</font> <font style="font: italic 10pt times new roman; display: inline"> </font> </div>
</div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">As of the fund’s most recent fiscal year end (September 30, 2012), the fund’s Investor Class AGR was 1.98% and its AVM was $115.81. The AGR and AVM for the Advisor Class will differ from that of the Investor Class, depending on the expenses of that class.</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">When determining whether to sell a security, the portfolio managers consider, among other things, the fund's average maturity, current and anticipated changes in interest rates, current valuation relative to alternatives in the market, general market conditions and any other factors deemed relevant by the portfolio managers.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Securities issued or guaranteed by the U.S. Treasury and certain U.S. government agencies or instrumentalities are supported by the full faith and credit of the U.S. government. Zero-coupon U.S. government agency securities that are ultimately backed by securities or payment obligations of the U.S. Treasury and are considered by the market to be of comparable credit quality, such as Resolution Funding Corporation (REFCORP) bonds, are considered to be zero-coupon U.S. Treasury equivalents by the fund's managers. Securities issued or guaranteed by other U.S. government agencies or instrumentalities, such as the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), and the Federal Home Loan Bank, are not guaranteed by the U.S. Treasury or supported by the full faith and credit of the U.S. government. However, these agencies or instrumentalities are authorized to borrow from the U.S. Treasury to meet their obligations.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Principal Risks</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Principal Risks</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt Times New Roman">Principal Risks</font></div>
<table cellpadding="0" cellspacing="0" style="width: 100%; font: 10pt times new roman; font-size: 10pt; font-family: times new roman">
<tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 89%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Interest Rate Risk</font> - Generally, when interest rates rise, the fund’s share value will decline. The opposite is true when interest rates decline. Funds with longer weighted average maturities are more sensitive to interest rate changes. Additionally, in extreme low interest rate environments, the fund’s expenses may exceed the yields on the securities in which the fund invests, resulting in a negative anticipated growth rate (AGR). You may lose money as a result of holding fund shares with a negative AGR.</font> </div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 89%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Unanticipated Capital Gains or Losses</font> - When shareholders redeem their shares before the target maturity date, the fund may need to liquidate holdings to meet these redemptions and unanticipated capital gains or losses may result. The fund will distribute these capital gains or losses to all shareholders.</font></div>
</td>
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<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 89%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Zero-Coupon U.S. Treasury Correlation</font> - Although the fund's investment policies are designed to provide an investment that is similar to investing in a zero-coupon U.S. Treasury security that matures in the year 2015, a precise forecast of the fund's final maturity value and yield to maturity is not possible.</font></div>
</td>
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<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 89%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Market Risk</font> - The value of the securities owned by the fund may go up and down, sometimes rapidly or unpredictably.</font></div>
</td>
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<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 89%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Principal Loss</font> - At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.</font></div>
</td>
</tr></table>
<div style="line-height: 1.25; text-indent: 0pt; display: block"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</font></div>
<table cellpadding="0" cellspacing="0" style="width: 100%; font: 10pt times new roman; font-size: 10pt; font-family: times new roman">
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<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Interest Rate Risk</font> - Generally, when interest rates rise, the fund’s share value will decline. The opposite is true when interest rates decline. Funds with longer weighted average maturities are more sensitive to interest rate changes. Additionally, in extreme low interest rate environments, the fund’s expenses may exceed the yields on the securities in which the fund invests, resulting in a negative anticipated growth rate (AGR). You may lose money as a result of holding fund shares with a negative AGR.</font> </div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Unanticipated Capital Gains or Losses</font> - When shareholders redeem their shares before the target maturity date, the fund may need to liquidate holdings to meet these redemptions and unanticipated capital gains or losses may result. The fund will distribute these capital gains or losses to all shareholders.</font></div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Zero-Coupon U.S. Treasury Correlation</font> - Although the fund's investment policies are designed to provide an investment that is similar to investing in a zero-coupon U.S. Treasury security that matures in the year 2020, a precise forecast of the fund's final maturity value and yield to maturity is not possible.</font></div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Market Risk</font> - The value of the securities owned by the fund may go up and down, sometimes rapidly or unpredictably.</font></div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Principal Loss</font> - At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.</font></div>
</td>
</tr></table>
<div style="line-height: 1.25; text-indent: 0pt; display: block"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</font></div>
<table cellpadding="0" cellspacing="0" style="width: 100%; font: 10pt times new roman; font-size: 10pt; font-family: times new roman">
<tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Interest Rate Risk</font> - Generally, when interest rates rise, the fund’s share value will decline. The opposite is true when interest rates decline. Funds with longer weighted average maturities are more sensitive to interest rate changes. Additionally, in extreme low interest rate environments, the fund’s expenses may exceed the yields on the securities in which the fund invests, resulting in a negative anticipated growth rate (AGR). You may lose money as a result of holding fund shares with a negative AGR.</font> </div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Unanticipated Capital Gains or Losses</font> - When shareholders redeem their shares before the target maturity date, the fund may need to liquidate holdings to meet these redemptions and unanticipated capital gains or losses may result. The fund will distribute these capital gains or losses to all shareholders.</font></div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Zero-Coupon U.S. Treasury Correlation</font> - Although the fund's investment policies are designed to provide an investment that is similar to investing in a zero-coupon U.S. Treasury security that matures in the year 2025, a precise forecast of the fund's final maturity value and yield to maturity is not possible.</font></div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Market Risk</font> - The value of the securities owned by the fund may go up and down, sometimes rapidly or unpredictably.</font></div>
</td>
</tr><tr>
<td style="text-align: left; vertical-align: top; width: 1%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman">•</font></div>
</td>
<td style="text-align: left; vertical-align: top; width: 88%">
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Principal Loss</font> - At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.</font></div>
</td>
</tr></table>
<div style="line-height: 1.25; text-indent: 0pt; display: block"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"><font style="display: inline; font: bold 12pt Times New Roman">Fund Performance</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"><font style="display: inline; font: bold 12pt Times New Roman">Fund Performance</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"><font style="display: inline; font: bold 12pt Times New Roman">Fund Performance</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The table also shows results for a U.S. Treasury zero-coupon security (STRIPS Issue) with a maturity date similar to the fund. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, including yields, please visit americancentury.com.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The table also shows results for a U.S. Treasury zero-coupon security (STRIPS Issue) with a maturity date similar to the fund. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, including yields, please visit americancentury.com.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Investor Class shares. The table shows how the fund’s average annual returns for the periods shown compared with those of a broad measure of market performance. The table also shows results for a U.S. Treasury zero-coupon security (STRIPS Issue) with a maturity date similar to the fund. The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, including yields, please visit americancentury.com.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: justify"> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt times new roman">Calendar Year Total Returns</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt times new roman">Calendar Year Total Returns</font> </div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: bold 12pt times new roman">Calendar Year Total Returns</font> </div>
<div><font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Highest Performance Quarter</font> </font><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">(3Q 2004): 7.63%</font></font> </font></font></div>
<div><font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Lowest Performance Quarter </font></font><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">(2Q 2004): -6.22%</font></font></font></font></div>
<div><font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Highest Performance Quarter</font> </font><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">(3Q 2011): 14.28%</font></font> </font></font></div>
<div><font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Lowest Performance Quarter </font></font><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">(2Q 2004): -7.29%</font></font></font></font></div>
<div><font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Highest Performance Quarter</font> </font><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">(3Q 2011): 24.74%</font></font></font></font></div>
<div><font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Lowest Performance Quarter </font></font><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">(4Q 2010): -10.90%</font></font></font></font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="font: normal 10pt Times New Roman; display: inline">Average Annual Total Returns <font style="font: normal 10pt Times New Roman; display: inline">For the calendar year ended December 31, 2012</font> </font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="font: normal 10pt Times New Roman; display: inline">Average Annual Total Returns <font style="font: normal 10pt Times New Roman; display: inline">For the calendar year ended December 31, 2012</font> </font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="font: normal 10pt Times New Roman; display: inline">Average Annual Total Returns <font style="font: normal 10pt Times New Roman; display: inline">For the calendar year ended December 31, 2012</font> </font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Shareholder Fees</font> (fees paid directly from your investment)</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Shareholder Fees</font> (fees paid directly from your investment)</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Shareholder Fees</font> (fees paid directly from your investment)</font></div>
RISK/RETURN
RISK/RETURN
RISK/RETURN
25
0
25
0
25
0
0.0055
0.0055
0.0055
0.0055
0.0055
0.0055
0
0.0025
0
0.0025
0
0.0025
0.00
0.00
0.00
0.00
0.00
0.00
0.0055
0.0080
0.0055
0.008
0.0055
0.008
56
82
56
82
56
82
177
256
177
256
177
256
308
445
308
445
308
445
690
990
690
990
690
990
0.0136
0.0145
-0.0078
0.0268
0.0120
0.0367
0.0564
0.0524
0.0384
0.0353
0.0497
0.062
0.0571
0.0410
0.0454
0.0546
0.0367
0.0367
0.0635
0.0581
0.0399
0.0419
0.0555
0.0961
0.1003
0.0891
0.0711
0.0673
0.0864
0.1117
0.0964
0.0773
0.0734
0.0936
0.0961
0.0961
0.062
0.0590
0.0402
0.0412
0.0563
0.0761
0.0857
0.08
0.0606
0.0586
0.0773
0.0953
0.0882
0.0665
0.0650
0.0854
0.0761
0.0761
0.0393
0.0348
0.0203
0.0909
0.1244
0.1638
0.0487
0.1029
0.1449
0.0219
0.0025
-0.0121
0.1009
0.0955
0.0943
0.1277
0.1696
0.2650
-0.0091
-0.0742
-0.2096
0.0885
0.1258
0.1505
0.0752
0.1951
0.3035
0.0145
0.0524
0.0571
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.40
.47
.73
The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods, that
you earn a 5% return each year, and that the fund's operating expenses remain
the same. Although your actual costs may be higher or lower, based on these
assumptions your costs would be:
The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods, that
you earn a 5% return each year, and that the fund's operating expenses remain
the same. Although your actual costs may be higher or lower, based on these
assumptions your costs would be:
The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods, that
you earn a 5% return each year, and that the fund's operating expenses remain
the same. Although your actual costs may be higher or lower, based on these
assumptions your costs would be:
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Principal Loss</font> - At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Principal Loss</font> - At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt times new roman"><font style="display: inline; font-weight: bold">Principal Loss</font> - At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.</font></div>
<font style="display: inline; font: 10pt Times New Roman">The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund's performance from year to year for Investor Class shares. The table shows how the fund's average annual returns for the periods shown compared with those of a broad measure of market performance.
<font style="display: inline; font: 10pt Times New Roman">The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund's performance from year to year for Investor Class shares. The table shows how the fund's average annual returns for the periods shown compared with those of a broad measure of market performance.
<font style="display: inline; font: 10pt Times New Roman">The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund's performance from year to year for Investor Class shares. The table shows how the fund's average annual returns for the periods shown compared with those of a broad measure of market performance.
The table also shows results for a U.S. Treasury zero-coupon security (STRIPS Issue) with a maturity date similar to the fund.
The table also shows results for a U.S. Treasury zero-coupon security (STRIPS Issue) with a maturity date similar to the fund.
The table also shows results for a U.S. Treasury zero-coupon security (STRIPS Issue) with a maturity date similar to the fund.
americancentury.com
americancentury.com
americancentury.com
The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.</font></div>
<font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Highest
Performance Quarter</font>
<font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Highest
Performance Quarter</font>
<font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Highest
Performance Quarter</font>
<font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Lowest
Performance Quarter
<font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Lowest
Performance Quarter
<font style="font-weight: bold"><font style="font-weight: normal"><font style="font: normal 10pt times new roman"><font style="display: inline; font: normal 10pt times new roman">Lowest
Performance Quarter
2004-09-30
2011-09-30
2011-09-30
2004-06-30
2004-06-30
2010-12-31
0.0763
0.1428
0.2474
-0.0622
-0.0729
-0.1090
After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.</font>
Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.</font>
Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.</font>
<font style="display: inline; font: 10pt Times New Roman">The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary.
<font style="display: inline; font: 10pt Times New Roman">The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary.
<font style="display: inline; font: 10pt Times New Roman">The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary.
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<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</font></div>
<div style="line-height: 1.25; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt; text-align: left"><font style="display: inline; font: 10pt Times New Roman">An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</font></div>