0000827060 2012-06-30 2012-06-30 0000827060 acqef:S000021731Member 2012-06-30 2012-06-30 0000827060 acqef:S000021731Member acqef:C000062330Member 2012-06-30 2012-06-30 0000827060 acqef:S000021731Member acqef:C000062331Member 2012-06-30 2012-06-30 0000827060 acqef:S000021731Member acqef:C000062332Member 2012-06-30 2012-06-30 0000827060 acqef:S000021731Member acqef:C000062328Member 2012-06-30 2012-06-30 0000827060 acqef:S000021731Member acqef:C000062329Member 2012-06-30 2012-06-30 0000827060 acqef:S000021730Member 2012-06-30 2012-06-30 0000827060 acqef:S000021730Member acqef:C000062321Member 2012-06-30 2012-06-30 0000827060 acqef:S000021730Member acqef:C000062322Member 2012-06-30 2012-06-30 0000827060 acqef:S000021730Member acqef:C000062323Member 2012-06-30 2012-06-30 0000827060 acqef:S000021730Member acqef:C000062325Member 2012-06-30 2012-06-30 0000827060 acqef:S000021730Member acqef:C000062326Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member acqef:C000016462Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member rr:AfterTaxesOnDistributionsMember acqef:C000016462Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000016462Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member acqef:C000016464Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member acqef:C000016463Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member acqef:C000055501Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member acqef:C000016465Member 2012-06-30 2012-06-30 0000827060 acqef:S000005976Member acqef:index_Russell_1000_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member acqef:C000016478Member 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member rr:AfterTaxesOnDistributionsMember acqef:C000016478Member 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000016478Member 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member acqef:C000016479Member 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member acqef:C000016480Member 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member acqef:C000016482Member 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member acqef:C000016483Member 2012-06-30 2012-06-30 0000827060 acqef:S000005980Member acqef:index_Barclays_Capital_US_13_Month_Treasury_Bill_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member acqef:C000016466Member 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member rr:AfterTaxesOnDistributionsMember acqef:C000016466Member 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000016466Member 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member acqef:C000016468Member 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member acqef:C000016467Member 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member acqef:C000016469Member 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member acqef:C000016470Member 2012-06-30 2012-06-30 0000827060 acqef:S000005977Member acqef:index_SP_500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member acqef:C000016471Member 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member rr:AfterTaxesOnDistributionsMember acqef:C000016471Member 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000016471Member 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member acqef:C000055503Member 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member acqef:C000016472Member 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member acqef:C000055505Member 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member acqef:C000055506Member 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member acqef:index_MSCI_World_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005978Member acqef:index_NYSE_Arca_Gold_Miners_Index2_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member acqef:C000039160Member 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member rr:AfterTaxesOnDistributionsMember acqef:C000039160Member 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000039160Member 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member acqef:C000039161Member 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member acqef:C000039162Member 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member acqef:C000039164Member 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member acqef:C000039165Member 2012-06-30 2012-06-30 0000827060 acqef:S000014383Member acqef:index_MSCI_EAFE_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member acqef:C000016473Member 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member rr:AfterTaxesOnDistributionsMember acqef:C000016473Member 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000016473Member 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member acqef:C000016475Member 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member acqef:C000016474Member 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member acqef:C000016476Member 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member acqef:C000016477Member 2012-06-30 2012-06-30 0000827060 acqef:S000005979Member acqef:index_SP_500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000034237Member 2012-06-30 2012-06-30 0000827060 acqef:S000034237Member acqef:C000105525Member 2012-06-30 2012-06-30 0000827060 acqef:S000010998Member 2012-06-30 2012-06-30 0000827060 acqef:S000010998Member acqef:C000030376Member 2012-06-30 2012-06-30 0000827060 acqef:S000010998Member rr:AfterTaxesOnDistributionsMember acqef:C000030376Member 2012-06-30 2012-06-30 0000827060 acqef:S000010998Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000030376Member 2012-06-30 2012-06-30 0000827060 acqef:S000010998Member acqef:index_SP_500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000010999Member 2012-06-30 2012-06-30 0000827060 acqef:S000010999Member acqef:C000030377Member 2012-06-30 2012-06-30 0000827060 acqef:S000010999Member rr:AfterTaxesOnDistributionsMember acqef:C000030377Member 2012-06-30 2012-06-30 0000827060 acqef:S000010999Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000030377Member 2012-06-30 2012-06-30 0000827060 acqef:S000010999Member acqef:index_Russell_2000_Index1_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000010999Member acqef:index_SP_SmallCap_600_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member acqef:C000086055Member 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member rr:AfterTaxesOnDistributionsMember acqef:C000086055Member 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000086055Member 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member acqef:C000086056Member 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member acqef:C000086057Member 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member acqef:C000086058Member 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member acqef:C000086059Member 2012-06-30 2012-06-30 0000827060 acqef:S000028150Member acqef:index_Barclays_US_13_Month_Treasury_Bill_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member acqef:C000016484Member 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member rr:AfterTaxesOnDistributionsMember acqef:C000016484Member 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000016484Member 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member acqef:C000016486Member 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member acqef:C000016485Member 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member acqef:C000088007Member 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member acqef:C000016487Member 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member acqef:index_Russell_2000_Index3_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005981Member acqef:index_SP_SmallCap_600_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005982Member 2012-06-30 2012-06-30 0000827060 acqef:S000005982Member acqef:C000016488Member 2012-06-30 2012-06-30 0000827060 acqef:S000005982Member rr:AfterTaxesOnDistributionsMember acqef:C000016488Member 2012-06-30 2012-06-30 0000827060 acqef:S000005982Member rr:AfterTaxesOnDistributionsAndSalesMember acqef:C000016488Member 2012-06-30 2012-06-30 0000827060 acqef:S000005982Member acqef:index_SP_500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 0000827060 acqef:S000005982Member acqef:index_Russell_3000_Utilities_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-06-30 2012-06-30 xbrli:pure iso4217:USD Prior to September 4, 2007, this class was referred to as the Advisor Class and did not have a front-end sales charge. Performance has been restated to reflect this charge. Prior to September 4, 2007, this class was referred to as the Advisor Class and did not have a front-end sales charge. Performance has been restated to reflect this charge. Prior to September 4, 2007, this class was referred to as the Advisor Class and did not have a front-end sales charge. Performance has been restated to reflect this charge. NYSE Arca Gold Miners Index benchmark total return data is first available as of October 1, 2004. Prior to September 4, 2007, this class was referred to as the Advisor Class and did not have a front-end sales charge. Performance has been restated to reflect this charge. Effective June 30, 2012, the fund's benchmark changed from the S&P SmallCap 600 Index to the Russell 2000 Index. The fund's investment advisor believes that the Russell 2000 Index aligns better with the fund's strategy. Prior to March 1, 2010, the A Class was referred to as the Advisor Class and did not have a front-end sales charge. Performance prior to that date has been restated to reflect this charge. Historical performance for C Class prior to its inception is based on the performance of Investor Class shares. C Class performance has been adjusted to reflect differences in sales charges, if applicable, and expenses between classes. Effective June 30, 2012, the fund's benchmark changed from the S&P SmallCap 600 Index to the Russell 2000 Index. The fund's investment advisor believes that the Russell 2000 Index aligns better with the fund's strategy. AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS, INC. 485BPOS false 0000827060 2012-06-30 2012-10-26 2012-11-01 2012-11-01 CORE EQUITY PLUS FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8212; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font> &#8212; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Short Sales Risk</font> &#8212; If the market price of a security increases after the fund borrows the security, the fund may suffer a loss when it replaces the borrowed security at the higher price. Any loss will be increased by the amount of compensation, interest or dividends, and transaction costs the fund must pay to the lender of the borrowed security.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Leverage Risk</font> &#8212; The fund&#8217;s investment strategy utilizes leverage, which can increase market exposure and subject the fund to greater risk and higher volatility.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Overweighting Risk</font> &#8212; If the fund is overweighted in a stock or sector, any negative development related to that stock or sector will have a greater impact on the fund than other funds that are not overweighted in that stock or sector.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8212; The fund&#8217;s performance will be tied to the performance of its benchmark, the S&amp;P 500<font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8212; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8212; The value of the fund&#8217;s shares may fluctuate significantly in the&#160;&#160;short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8212; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund&#8217;s performance history is not available as of the date of this prospectus. When the fund has investment results for a full calendar year, this section will feature charts that show annual total returns, highest and lowest quarterly returns and average annual total returns for the fund. This information indicates the volatility of the fund&#8217;s historical returns from year to year.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Performance information is designed to help you see how fund returns can vary. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">For current performance information, please visit americancentury.com.</font> </div> The fund's performance history is not available as of the date of this prospectus. When the fund has investment results for a full calendar year, this section will feature charts that show annual total returns, highest and lowest quarterly returns and average annual total returns for the fund. Performance information is designed to help you see how fund returns can vary. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future. americancentury.com Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000<font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 12 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0131 0.0111 0.0131 0.0131 0.0131 0.0000 0.0000 0.0025 0.0100 0.0050 0.0075 0.0075 0.0075 0.0075 0.0075 0.0035 0.0035 0.0035 0.0035 0.0035 0.0040 0.0040 0.0040 0.0040 0.0040 0.0000 0.0000 0.0000 0.0000 0.0000 0.0206 0.0186 0.0231 0.0306 0.0256 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000021731Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://americancentury.com/role/OperatingExpensesDataAlt100000 column dei_LegalEntityAxis compact acqef_S000021731Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 210 647 1109 2386 189 586 1007 2177 796 1256 1740 3065 310 947 1607 3366 260 798 1361 2890 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000021731Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the period from the fund&#8217;s inception on October 31, 2011 through June 30, 2012, the fund&#8217;s portfolio turnover rate was 105% of the average value of its portfolio.</font> </div> 1.05 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The managers use quantitative models to construct the portfolio of equity securities<font style="FONT-STYLE: italic; DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>for the fund. The fund invests approximately 130% of its assets in long positions, while 30% of its assets are sold short. A long position arises when the fund buys a security outright. A short position arises when the fund sells a security it does not own but has borrowed in anticipation that the market price of the security will decline. If the market price in fact declines, the fund can replace the borrowed security at a lower price and capture the value represented by the difference between the higher sale price and the lower replacement price. The proceeds from the securities sold short are used to purchase an additional 30% of long positions. The net investment exposure for the fund is a 100% long market exposure.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The portfolio managers buy, or take long positions in, equity securities that they have identified as the most attractive and take short positions in equity securities that they have identified as the least attractive using a multi-factor quantitative model in a two-step process. In the first step, the managers rank stocks, primarily large (those with a market capitalization greater than $2 billion), publicly-traded U.S. companies, using a stock selection model that combines measures of both a stock&#8217;s value and its growth potential. In the second step, the managers use a quantitative model to build a portfolio that provides the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock from the fund's long portfolio when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund&#8217;s use of short selling as a primary investment strategy creates leverage in an attempt to increase returns.</font> </div> DISCIPLINED GROWTH PLUS FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Style Risk</font> &#8211; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font> &#8211; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Short Sales Risk</font> &#8211; If the market price of a security increases after the fund borrows the security, the fund may suffer a loss when it replaces the borrowed security at the higher price. Any loss will be increased by the amount of compensation, interest or dividends, and transaction costs the fund must pay to the lender of the borrowed security.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Leverage Risk</font> &#8211; The fund&#8217;s investment strategy utilizes leverage, which can increase market exposure and subject the fund to greater risk and higher volatility.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Overweighting Risk</font> &#8211; If the fund is overweighted in a stock or sector, any negative development related to that stock or sector will have a greater impact on the fund than other funds that are not overweighted in that stock or sector.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8211; The fund&#8217;s performance will be tied to the performance of its benchmark, the Russell 1000<font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Growth Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Growth Stocks</font> &#8211; Investments in growth stocks may involve special risks and their prices tend to fluctuate more dramatically than the overall stock market.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td valign="top" width="1%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td valign="top" width="89%" style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund&#8217;s performance history is not available as of the date of this prospectus. When the fund has investment results for a full calendar year, this section will feature charts that show annual total returns, highest and lowest quarterly returns and average annual total returns for the fund. This information indicates the volatility of the fund&#8217;s historical returns from year to year.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Performance information is designed to help you see how fund returns can vary. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">For current performance information, please visit americancentury.com.</font> </div> The fund's performance history is not available as of the date of this prospectus. When the fund has investment results for a full calendar year, this section will feature charts that show annual total returns, highest and lowest quarterly returns and average annual total returns for the fund. Performance information is designed to help you see how fund returns can vary. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future. americancentury.com Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 12 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0146 0.0126 0.0146 0.0146 0.0146 0.0000 0.0000 0.0025 0.0100 0.0050 0.0102 0.0102 0.0102 0.0102 0.0102 0.0065 0.0065 0.0065 0.0065 0.0065 0.0036 0.0036 0.0036 0.0036 0.0036 0.0001 0.0001 0.0001 0.0001 0.0001 0.0248 0.0228 0.0273 0.0348 0.0298 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000021730Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://americancentury.com/role/OperatingExpensesDataAlt100000 column dei_LegalEntityAxis compact acqef_S000021730Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 252 774 1321 2811 232 713 1221 2611 836 1375 1937 3454 352 1070 1808 3747 302 923 1568 3292 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000021730Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the period from the fund&#8217;s inception on October 31, 2011 through June 30, 2012, the fund&#8217;s portfolio turnover rate was 89% of the average value of its portfolio.</font> </div> 0.89 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The managers use quantitative models to construct the portfolio of equity securities for the fund. The fund invests approximately 130% of its assets in long positions, while 30% of its assets are sold short. A long position arises when the fund buys a security outright. A short position arises when the fund sells a security it does not own but has borrowed in anticipation that the market price of the security will decline. If the market price in fact declines, the fund can replace the borrowed security at a lower price and capture the value represented by the difference between the higher sale price and the lower replacement price. The proceeds from the securities sold short are used to fund the purchase of the additional 30% of long positions. The net investment exposure for the fund is a 100% long market exposure.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The portfolio managers buy, or take long positions in, equity securities that they have identified as the most attractive and take short positions in equity securities that they have identified as the least attractive using a multi-factor quantitative model in a two-step process. In the first step, the managers rank stocks, primarily large (those with a market capitalization greater than $2 billion), publicly-traded U.S. companies, using a stock selection model that focuses primarily on growth potential and earnings sustainability. In the second step, the managers use a quantitative model to build a portfolio that provides the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock from the fund's long portfolio when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund&#8217;s use of short selling as a primary investment strategy creates leverage in an attempt to increase returns.</font> </div> DISCIPLINED GROWTH FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8211; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>&#8211; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8211; The fund&#8217;s performance will be tied to the performance of its benchmark, the Russell 1000<font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Growth Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Growth Stocks</font> &#8211; Investments in growth stocks may involve special risks and their prices tend to fluctuate more dramatically than the overall stock market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns 0.1130 0.1124 -0.4118 0.3502 0.2217 0.0249 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000005976Member column rr_ProspectusShareClassAxis compact acqef_C000016462Member row primary compact * ~ Highest Performance Quarter 0.1525 2009-06-30 Lowest Performance Quarter -0.2362 2008-12-31 Investor Class year-to-date 0.1733 2012-09-30 <div> <font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(2Q 2009): 15.25%</font></font></font></font></font></font></font> </div> <br/><div> <font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(4Q 2008): -23.62%</font></font></font></font></font></font></font> </div> <br/><div> <font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the most</font></font> <font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">recent calendar quarter end, the</font></font></font></font></font></font></font> <font style="FONT-STYLE: italic; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">fund&#8217;s Investor Class year-to-date</font></font> <font style="FONT-STYLE: normal; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">return was 17.33%.</font></font></font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 0.0249 0.0204 0.0417 0.0241 0.0178 0.0393 0.0173 0.0166 0.0351 0.0277 0.0224 0.0438 -0.0364 0.0058 0.0293 0.0147 -0.0128 0.0208 0.0154 0.0366 0.0264 0.0250 0.0391 2005-09-30 2005-09-30 2005-09-30 2005-09-30 2005-09-30 2007-09-28 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000005976Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 13 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0103 0.0083 0.0103 0.0103 0.0103 0.0000 0.0000 0.0025 0.0100 0.0050 0.0001 0.0001 0.0001 0.0001 0.0001 0.0104 0.0084 0.0129 0.0204 0.0154 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000005976Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000005976Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 13 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 106 331 575 1271 86 269 467 1037 699 961 1243 2041 208 641 1099 2366 157 487 840 1833 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000005976Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 94% of the average value of its portfolio.</font> </div> 0.94 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">In selecting stocks for the fund, the portfolio managers use quantitative management techniques in a two-step process.&#160;&#160;First, the managers rank stocks, primarily large (those with a market capitalization greater than $2 billion), publicly-traded U.S. companies from most attractive to least attractive. This is determined using a stock selection model that focuses primarily on measures of a stock&#8217;s growth potential and earnings sustainability.&#160;&#160;Second, the portfolio managers use a quantitative model to build a portfolio of stocks from the ranking described above that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> EQUITY MARKET NEUTRAL FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Management Risk</font> &#8211; Although the fund seeks to have approximately equal dollar amounts invested in long and short positions and a neutral exposure to market movements, there is a risk that the portfolio managers will not be able to construct a portfolio of long and short positions that has limited exposure to general market movements.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>&#8211; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Failure to Maintain Market Neutrality</font> &#8211; Though the fund seeks to limit risks associated with investing in the general equity market, external conditions may impact the fund&#8217;s performance. In addition, although the portfolio managers intend to construct a market neutral portfolio, there is a risk that the portfolio managers will not construct a portfolio that limits exposure to general market movements.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8211; Because the fund&#8217;s portfolio may not always be style-neutral, its performance may be sensitive to the value/growth cycle within the U.S. equity markets. Also, if at any time the market is not favoring the fund&#8217;s quantitative style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Short Sales Risk</font> &#8211; If the market price of a security increases after the fund borrows the security, the fund may suffer a loss when it replaces the borrowed security at the higher price.&#160;&#160;Any loss will be increased by the amount of compensation, interest or dividends, and transaction costs the fund must pay to a lender of the security.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Overweighting Risk</font> &#8211; If the fund is overweighted in a stock or sector, any negative development related to that stock or sector will have a greater impact on the fund than other funds that are not overweighted in that stock or sector.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Small Cap Stocks</font> &#8211; Though the fund invests primarily in larger companies, it may also invest in smaller companies. Investments in smaller companies may be more volatile and subject to greater risk than larger companies.&#160;&#160;Smaller companies may have limited financial resources, product lines and markets, and their securities may trade less frequently and in more limited volumes than the securities of larger companies, which could lead to higher transaction costs.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities the fund owns in its long portfolio or in which the fund has taken a short position.</font> </div> </td> </tr> </table> <br/><table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns 0.0508 0.0785 -0.0255 -0.0775 0.0172 0.0587 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000005980Member column rr_ProspectusShareClassAxis compact acqef_C000016478Member row primary compact * ~ Highest Performance Quarter 0.1073 2006-06-30 Lowest Performance Quarter -0.0678 2008-09-30 Investor Class year-to-date -0.0075 2012-09-30 <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="justify"> <font style="FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-SIZE: 10pt"><font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(2Q 2006): 10.73%</font></font></font></font></font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="justify"> <font style="FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-SIZE: 10pt"><font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(3Q 2008): -6.78%</font></font></font></font></font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="justify"> <font style="FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-SIZE: 10pt"><font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">most recent calendar quarter end,</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">the fund&#8217;s Investor Class year-to-</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">date return was -0.75.</font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 0.0587 0.0087 0.0145 0.0587 0.0076 0.0133 0.0382 0.0070 0.0119 0.0623 0.0109 0.0166 -0.0038 -0.0054 0.0026 0.0487 -0.0014 0.0044 0.0538 0.0036 0.0094 0.0007 0.0136 0.0200 2005-09-30 2005-09-30 2005-09-30 2005-09-30 2005-09-30 2005-09-30 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000005980Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000<font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 13 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0139 0.0119 0.0139 0.0139 0.0139 0.0000 0.0000 0.0025 0.0100 0.0050 0.0199 0.0199 0.0199 0.0199 0.0199 0.0141 0.0141 0.0141 0.0141 0.0141 0.0057 0.0057 0.0057 0.0057 0.0057 0.0001 0.0001 0.0001 0.0001 0.0001 0.0338 0.0318 0.0363 0.0438 0.0388 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000005980Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://americancentury.com/role/OperatingExpensesDataAlt100000 column dei_LegalEntityAxis compact acqef_S000005980Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 13 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 342 1041 1761 3658 322 982 1665 3477 920 1624 2346 4231 441 1329 2226 4507 391 1186 1996 4094 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000005980Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks capital appreciation independent of equity market conditions.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 252% of the average value of its portfolio.</font> </div> 2.52 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The managers use quantitative models to construct the portfolio for the fund. The portfolio managers buy, or take long positions in, equity securities that they have identified as undervalued. They take short positions in equity securities that they have identified as overvalued.<font id="TAB1" style="MARGIN-LEFT: 12pt"></font>A short position arises when the fund sells a security it does not own but has borrowed in anticipation that the market price of the security will decline. If the market price in fact declines, the fund can replace the borrowed security at a lower price and capture the value represented by the difference between the higher sale price and the lower replacement price. The fund&#8217;s investment process is designed to maintain approximately equal dollar amounts invested in long and short positions at all times. By employing this market neutral strategy, the fund seeks to limit market risk (the effects of general market movements on the fund&#8217;s performance). A market neutral strategy seeks to limit the fund&#8217;s volatility relative to the market. As a result of this strategy, the portfolio&#8217;s price movements are not expected to correlate with the market&#8217;s price movements.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">In selecting stocks for the fund, the portfolio managers use quantitative management techniques in a two-step process.&#160;&#160;First, the managers rank stocks, primarily publicly traded U.S. companies with a market capitalization greater than $1 billion, from most attractive to least attractive based on each stock&#8217;s value, as well as its growth potential.&#160;&#160;Second, the portfolio managers use a quantitative model to build a portfolio of stocks from the ranking described above that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity, or specific events alter its prospects.</font> </div> EQUITY GROWTH FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8212; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>&#8212; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8212; The fund&#8217;s performance will be tied to the performance of its benchmark, the S&amp;P 500<font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8212; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8212; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8212; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns -0.2032 0.3027 0.1398 0.0730 0.1414 0.0342 -0.3474 0.2004 0.1490 0.0406 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000005977Member column rr_ProspectusShareClassAxis compact acqef_C000016466Member row primary compact * ~ Highest Performance Quarter 0.1514 2003-06-30 Lowest Performance Quarter -0.2163 2008-12-31 Investor Class year-to-date 0.1593 2012-09-30 <font style="DISPLAY: inline; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Highest Performance Quarter <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(2Q 2003): 15.14%</font></font></font></font></font></font> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(4Q 2008): -21.63%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">most recent calendar quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">end, the fund&#8217;s Investor Class</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">year-to-date return was 15.93%.</font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 0.0406 -0.0064 0.0344 0.0384 -0.0112 0.0304 0.0293 -0.0060 0.0292 0.0426 -0.0044 0.0365 -0.0210 -0.0204 0.0258 0.0304 -0.0162 0.0243 0.0354 -0.0113 0.0128 0.0211 -0.0025 0.0292 1991-05-09 1997-10-09 1998-01-02 2001-07-18 2005-07-29 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000005977Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 12 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0068 0.0048 0.0068 0.0068 0.0068 0.0000 0.0000 0.0025 0.0100 0.0050 0.0000 0.0000 0.0000 0.0000 0.0000 0.0068 0.0048 0.0093 0.0168 0.0118 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000005977Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000005977Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 70 218 379 847 49 154 269 604 665 855 1061 1652 171 530 913 1985 121 375 650 1431 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000005977Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth by investing in common stocks.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 86% of the average value of its portfolio.</font> </div> 0.86 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">In selecting stocks for the fund, the portfolio managers use quantitative management techniques in a two-step process.&#160;&#160;First, the managers rank stocks, primarily large (those with a market capitalization greater than $2 billion), publicly-traded U.S. companies, from most attractive to least attractive based on each stock&#8217;s value as well as its growth potential.&#160;&#160;Second, the portfolio managers use a quantitative model to build a portfolio of stocks from the ranking described above that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Under normal market conditions, at least 80% of the fund&#8217;s assets will be invested in equity securities.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> GLOBAL GOLD FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Gold Stocks</font> &#8212; Gold stocks are generally considered speculative because of high share price volatility. The price of gold will likely impact the value of the companies in which the fund invests. The price of gold will fluctuate, sometimes considerably. Though many investors believe that gold investments hedge against inflation, currency devaluations and stock market declines, there is no guarantee that these historical inverse relationships will continue.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Nondiversification</font> &#8212; The fund is classified as nondiversified. A nondiversified fund may invest a greater percentage of its assets in a smaller number of securities than a diversified fund. This gives the managers the flexibility to hold large positions in a small number of securities. If so, a price change in any one of those securities may have a greater impact on the fund's share price than would be the case in a diversified fund and the fund may be more volatile than if it was diversified.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Concentration Risk</font> &#8212; The fund concentrates its investments in a specific area and therefore may be subject to greater risks and market fluctuations than a portfolio representing a broader range of industries.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Foreign Securities Risk</font> &#8212; The fund invests primarily in foreign securities, which are generally riskier than U.S. stocks. Securities of foreign issuers may be less liquid, more volatile and harder to value than U.S. securities.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Emerging Markets Risk</font> &#8212;Investing in securities of companies located in emerging market countries generally is riskier than investing in securities of companies located in foreign developed countries.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Currency Risk</font> &#8212; Because the fund invests in securities denominated in foreign currencies, the fund is subject to currency risk, meaning that the fund could experience gains or losses based solely on changes in the exchange rate between foreign currencies and the U.S. dollar.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8212; The value of the fund's shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8212; The value of the fund's shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8212; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Nondiversification - The fund is classified as nondiversified. A nondiversified fund may invest a greater percentage of its assets in a smaller number of securities than a diversified fund. This gives the managers the flexibility to hold large positions in a small number of securities. If so, a price change in any one of those securities may have a greater impact on the fund's share price than would be the case in a diversified fund and the fund may be more volatile than if it was diversified. Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The table also shows returns for the NYSE Arca Gold Miners Index, which is a modified market capitalization-weighted index comprised of publicly traded companies involved primarily in mining for gold and silver. The fund&#8217;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, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns 0.7300 0.4670 -0.0817 0.2917 0.2703 0.1512 -0.2720 0.4326 0.4476 -0.1929 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000005978Member column rr_ProspectusShareClassAxis compact acqef_C000016471Member row primary compact * ~ Highest Performance Quarter 0.4019 2002-03-31 Lowest Performance Quarter -0.2972 2008-09-30 Investor Class year-to-date 0.0628 2012-09-30 <div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(1Q 2002): 40.19%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(3Q 2008): -29.72%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">most recent calendar quarter end,</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">the fund's Investor Class year-to-</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">date return was 6.28%.</font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 -0.1929 0.0700 0.1828 -0.2005 0.0571 0.1747 -0.1147 0.0571 0.1646 -0.1911 0.0583 -0.2412 0.0546 0.1730 -0.2009 0.0457 -0.1970 0.0509 -0.0554 -0.0237 0.0362 -0.1548 0.0636 2007-09-28 1988-08-17 2007-09-28 1998-05-06 2007-09-28 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000005978Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. The table also shows returns for the NYSE Arca Gold Miners Index, which is a modified market capitalization-weighted index comprised of publicly traded companies involved primarily in mining for gold and silver. The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 12 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0100 0.0100 0.0000 0.0000 0.0100 0.0068 0.0048 0.0068 0.0068 0.0068 0.0000 0.0000 0.0025 0.0100 0.0050 0.0001 0.0001 0.0001 0.0001 0.0001 0.0069 0.0049 0.0094 0.0169 0.0119 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000005978Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000005978Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 71 221 385 859 50 157 275 617 666 858 1066 1663 172 533 919 1996 122 378 655 1443 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000005978Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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 (unless otherwise indicated), 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks to realize a total return (capital growth and dividends) consistent with investment in securities of companies that are engaged in mining, processing, fabricating or distributing gold or other precious metals throughout the world.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 8% of the average value of its portfolio.</font> </div> 0.08 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund invests at least 80% of its assets in companies that are engaged in mining, processing, fabricating, distributing, exploring for or otherwise dealing in gold. The portfolio managers use quantitative management techniques and fundamental stock selection in a two-step process to construct the portfolio of stocks for the fund. First, the managers select stocks based on several valuation criteria, without comparing the fund&#8217;s holdings to the holdings of an index or benchmark. Second, the managers use a quantitative model to assess the fund&#8217;s risk characteristics relative to its benchmark and help the managers build a portfolio of stocks that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> The fund invests at least 80% of its assets in companies that are engaged in mining, processing, fabricating, distributing, exploring for or otherwise dealing in gold. The fund concentrates its investments in a specific area and therefore may be subject to greater risks and market fluctuations than a portfolio representing a broader range of industries. INTERNATIONAL CORE EQUITY FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Foreign Securities Risk</font> &#8211; The fund invests primarily in foreign securities, which are generally riskier than U.S. securities. As a result, the fund is subject to foreign risk, meaning that political events (such as civil unrest, national elections and imposition of exchange controls), social and economic events (such as labor strikes and rising inflation), and natural disasters occurring in a country where the fund invests could cause the fund&#8217;s investments in that country to experience gains or losses. Because of these risks, and others, securities of foreign issuers may be less liquid, more volatile, and harder to value than U.S. securities.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Emerging Markets Risk</font> &#8211; Investing in securities of companies located in emerging market countries generally is riskier than investing in securities of companies located in foreign developed countries.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Currency Risk</font> &#8211; Because the fund generally invests in securities denominated in foreign currencies, the fund is subject to currency risk, meaning that the fund could experience gains or losses based solely on changes in the exchange rate between foreign currencies and the U.S. dollar.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8211; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8211; The fund&#8217;s performance will likely be similar to the performance of its benchmark, the MSCI EAFE<font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Index.&#160;&#160;If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns 0.0841 -0.4323 0.2146 0.1011 -0.1157 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000014383Member column rr_ProspectusShareClassAxis compact acqef_C000039160Member row primary compact * ~ Highest Performance Quarter 0.2159 2009-06-30 Lowest Performance Quarter -0.2212 2008-09-30 Investor Class year-to-date 0.1180 2012-09-30 <div style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(2Q 2009):&#160;&#160;21.59%</font></font></font></font></font></font> </div> <br/><div style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(3Q 2008): -22.12%</font></font></font></font></font></font> </div> <br/><div style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">most recent calendar quarter end,</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">the fund's Investor Class year-to-</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">date return was 11.80%.</font></font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 -0.1157 -0.0615 -0.0516 -0.1170 -0.0665 -0.0566 -0.0697 -0.0511 -0.0430 -0.1139 -0.0597 -0.0498 -0.1682 -0.0748 -0.0649 -0.1248 -0.0709 -0.0611 -0.1204 -0.0664 -0.0565 -0.1214 -0.0472 -0.0406 2006-11-30 2006-11-30 2006-11-30 2006-11-30 2006-11-30 2006-11-30 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000014383Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 12 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0200 0.0200 0.0000 0.0000 0.0200 0.0116 0.0096 0.0116 0.0116 0.0116 0.0000 0.0000 0.0025 0.0100 0.0050 0.0002 0.0002 0.0002 0.0002 0.0002 0.0118 0.0098 0.0143 0.0218 0.0168 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000014383Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000014383Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 121 375 650 1431 100 313 542 1201 712 1002 1312 2189 222 683 1170 2510 171 530 913 1985 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000014383Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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 (unless otherwise indicated), 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 113% of the average value of its portfolio.</font> </div> 1.13 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">In selecting stocks for the fund, the portfolio managers select primarily from publicly traded companies located in developed countries excluding the United States and Canada that have characteristics similar to those of the companies that comprise the MSCI EAFE<font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> (Europe, Australasia, Far East) Index. The managers use quantitative models in a two-step process to construct the portfolio of stocks for the fund. First, the managers rank stocks from most attractive to least attractive based on each stock&#8217;s value as well as its growth potential.&#160;&#160;Second, the portfolio managers use a quantitative model to build a portfolio of stocks from the ranking described above that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers also intend to spread the fund&#8217;s holdings across different countries and geographic regions in an effort to manage the risks of an international portfolio. Though the fund invests primarily in securities issued by companies located in developed countries, it may also invest in emerging markets.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Under normal market conditions, at least 80% of the fund's assets will be invested in equity securities.</font> </div> INCOME & GROWTH FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8211; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>&#8211; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8211; The fund&#8217;s performance will be tied to the performance of its benchmark, the S&amp;P 500<font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Low Dividend Yield &#8211;</font> Although current income is an objective of the fund, if the stocks that make up the S&amp;P 500 do not have a high dividend yield, then the fund&#8217;s dividend yield will not be high.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns -0.1937 0.2962 0.1298 0.0479 0.1717 -0.0029 -0.3468 0.1792 0.1410 0.0302 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000005979Member column rr_ProspectusShareClassAxis compact acqef_C000016473Member row primary compact * ~ Highest Performance Quarter 0.1641 2003-06-30 Lowest Performance Quarter -0.1993 2008-12-31 Investor Class year-to-date 0.1523 2012-09-30 <div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(2Q 2003): 16.41%</font></font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(4Q 2008): -19.93%</font></font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">most recent calendar quarter end,</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">the fund's Investor Class year-to</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">date return was 15.23%.</font></font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 0.0302 -0.0202 0.0273 0.0277 -0.0269 0.0204 0.0229 -0.0177 0.0224 0.0322 -0.0183 0.0293 -0.0317 -0.0342 0.0186 0.0200 -0.0300 0.0171 0.0251 -0.0251 0.0371 0.0211 -0.0025 0.0292 1998-01-28 2001-06-28 1990-12-17 1997-12-15 2003-08-29 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000005979Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 12 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0068 0.0048 0.0068 0.0068 0.0068 0.0000 0.0000 0.0025 0.0100 0.0050 0.0000 0.0000 0.0000 0.0000 0.0000 0.0068 0.0048 0.0093 0.0168 0.0118 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000005979Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000005979Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 70 218 379 847 49 154 269 604 665 855 1061 1652 171 530 913 1985 121 375 650 1431 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000005979Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div align="left" style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth by investing in common stocks.</font></div> <div align="left" style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Income is a secondary objective.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 53% of the average value of its portfolio.</font> </div> 0.53 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">In selecting stocks for the fund, the portfolio managers use quantitative management techniques in a two-step process.&#160;&#160;First, the managers rank stocks, primarily large (those with a market capitalization greater than $2 billion), publicly-traded U.S. companies, from most attractive to least attractive based on each stock&#8217;s value as well as its growth potential (with a tilt towards value).&#160;&#160;Second, the portfolio managers use a quantitative model to build a portfolio of stocks from the ranking described above that they believe will provide the optimal balance between risk and expected return. The portfolio managers also attempt to create a dividend yield that will be greater than the S&amp;P 500<font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Index.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> NT CORE EQUITY PLUS FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8212; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>&#8212; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Short Sales Risk</font> &#8212; If the market price of a security increases after the fund borrows the security, the fund may suffer a loss when it replaces the borrowed security at the higher price. Any loss will be increased by the amount of compensation, interest or dividends, and transaction costs the fund must pay to the lender of the borrowed security.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Leverage Risk</font> &#8212; The fund&#8217;s investment strategy utilizes leverage, which can increase market exposure and subject the fund to greater risk and higher volatility.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Overweighting Risk</font> &#8212; If the fund is overweighted in a stock or sector, any negative development related to that stock or sector will have a greater impact on the fund than other funds that are not overweighted in that stock or sector.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8212; The fund&#8217;s performance will be tied to the performance of its benchmark, the S&amp;P 500<font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Tobacco Exclusion</font> &#8212; The fund&#8217;s prohibition on tobacco-related investments may cause it to forego profitable investment opportunities.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8212; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8212; The value of the fund&#8217;s shares may fluctuate significantly in the&#160;&#160;short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8212; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund&#8217;s performance history is not available as of the date of this prospectus. When the fund has investment results for a full calendar year, this section will feature charts that show annual total returns, highest and lowest quarterly returns and average annual total returns for the fund. This information indicates the volatility of the fund&#8217;s historical returns from year to year. For current performance information, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Performance information is designed to help you see how fund returns can vary. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future.</font> </div> The fund's performance history is not available as of the date of this prospectus. When the fund has investment results for a full calendar year, this section will feature charts that show annual total returns, highest and lowest quarterly returns and average annual total returns for the fund. Performance information is designed to help you see how fund returns can vary. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future. americancentury.com Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund.</font> </div> 0.0111 0.0000 0.0075 0.0035 0.0040 0.0000 0.0186 ~ http://americancentury.com/role/OperatingExpensesDataAlt100000 column dei_LegalEntityAxis compact acqef_S000034237Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 189 586 1007 2177 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000034237Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the period from the fund&#8217;s inception on December 1, 2011 through June 30, 2012, the fund&#8217;s portfolio turnover rate was 81% of the average value of its portfolio.</font> </div> 0.81 Principal Investments Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The managers use quantitative models to construct the portfolio of equity securities<font style="FONT-STYLE: italic; DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>for the fund. The fund invests approximately 130% of its assets in long positions, while 30% of its assets are sold short. A long position arises when the fund buys a security outright. A short position arises when the fund sells a security it does not own but has borrowed in anticipation that the market price of the security will decline. If the market price in fact declines, the fund can replace the borrowed security at a lower price and capture the value represented by the difference between the higher sale price and the lower replacement price. The proceeds from the securities sold short are used to purchase an additional 30% of long positions. The net investment exposure for the fund is a 100% long market exposure.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The portfolio managers buy, or take long positions in, equity securities that they have identified as the most attractive and take short positions in equity securities that they have identified as the least attractive using a multi-factor quantitative model in a two-step process. In the first step, the managers rank stocks, primarily large (those with a market capitalization greater than $2 billion), publicly-traded U.S. companies, using a stock selection model that combines measures of both a stock&#8217;s value and its growth potential. In the second step, the managers use a quantitative model to build a portfolio that provides the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock from the fund's long portfolio when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund&#8217;s use of short selling as a primary investment strategy creates leverage in an attempt to increase returns.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund is not permitted to invest in securities issued by companies assigned the Global Industry Classification Standard (GICS) for the tobacco industry.</font> </div> NT EQUITY GROWTH FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="99%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8211; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="99%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>&#8211; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="99%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8211; The fund&#8217;s performance will be tied to the performance of its benchmark, the S&amp;P 500<font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">&#174;</font> Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="99%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Tobacco Exclusion</font> &#8211; The fund&#8217;s prohibition on tobacco-related investments may cause it to forego profitable investment opportunities.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="99%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="99%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="99%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Institutional Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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, please visit americancentury.com.</font> </div> Calendar Year Total Returns 0.0357 -0.3417 0.2034 0.1475 0.0406 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000010998Member column rr_ProspectusShareClassAxis compact acqef_C000030376Member row primary compact * ~ Highest Performance Quarter 0.1493 2009-09-30 Lowest Performance Quarter -0.2129 2008-12-31 Institutional Class year-to-date 0.1587 2012-09-30 <div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(3Q 2009): 14.93%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(4Q 2008): -21.29%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the most</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">recent calendar quarter end, the</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">fund&#8217;s Institutional Class year-to-date</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">return was 15.87%.</font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 0.0406 -0.0041 0.0125 0.0313 -0.0078 0.0089 0.0384 -0.0038 0.0104 0.0211 -0.0025 0.0141 2006-05-12 2006-04-28 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000010998Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The 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&#8217;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> The 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. 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 Institutional 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund.</font> </div> 0.0048 0.0000 0.0000 0.0048 ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000010998Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 49 154 269 604 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000010998Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 104% of the average value of its portfolio.</font> </div> 1.04 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">In selecting stocks for the fund, the portfolio managers use quantitative management techniques in a two-step process.&#160;&#160;First, the managers rank stocks, primarily large (those with a market capitalization greater than $2 billion), publicly-traded U.S. companies from most attractive to least attractive based on each stock&#8217;s value as well as its growth potential.&#160;&#160;Second, the portfolio managers use a quantitative model to build a portfolio of stocks from the ranking described above that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Under normal market conditions, at least 80% of the fund&#8217;s assets will be invested in equity securities.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund is not permitted to invest in securities issued by companies assigned the Global Industry Classification Standard (GICS) for the tobacco industry.</font> </div> NT SMALL COMPANY Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Small Cap Stocks</font> &#8211; The smaller companies in which the fund invests may be more volatile and subject to greater risk than larger companies.&#160;&#160;Smaller companies may have limited financial resources, product lines and markets, and their securities may trade less frequently and in more limited volumes than the securities of larger companies, which could lead to higher transaction costs.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8211; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>&#8211; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8211; The fund&#8217;s performance will be tied to the performance of its benchmark, the Russell 2000 Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Tobacco Exclusion</font> &#8211; The fund&#8217;s prohibition on tobacco-related investments may cause it to forego profitable investment opportunities.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Institutional Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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, please visit americancentury.com.</font> </div> Calendar Year Total Returns -0.0583 -0.3820 0.2018 0.2750 -0.0081 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000010999Member column rr_ProspectusShareClassAxis compact acqef_C000030377Member row primary compact * ~ Highest Performance Quarter 0.1706 2009-09-30 Lowest Performance Quarter -0.2699 2008-12-31 Institutional Class year-to-date 0.1188 2012-09-30 <div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(3Q 2009): 17.06%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(4Q 2008): -26.99%</font></font></font></font></font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the most</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">recent calendar quarter end, the fund's</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Institutional Class year-to-date return</font></font></font></font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">was 11.88%.</font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 -0.0081 -0.0243 -0.0246 -0.0214 -0.0274 -0.0275 0.0117 -0.0206 -0.0209 -0.0418 0.0015 0.0134 0.0102 0.0194 0.0245 2006-05-12 2006-05-12 2006-05-12 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000010999Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The 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&#8217;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> The 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. 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 Institutional 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund.</font> </div> 0.0068 0.0000 0.0001 0.0069 ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000010999Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 71 221 385 859 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000010999Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 86% of the average value of its portfolio.</font> </div> 0.86 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Under normal market conditions, the fund will invest at least 80% of its assets in stocks of smaller-capitalization U.S. companies. The managers consider small companies to be those that, at the time of investment, have a market capitalization not greater than that of the largest company in the Russell 2000 Index. The portfolio managers use quantitative management techniques in a two-step process.&#160;&#160;First, the managers rank stocks, primarily smaller U.S. companies, from most attractive to least attractive based on each stock&#8217;s value as well as its growth potential.&#160;&#160;Second, the portfolio managers use a quantitative model to build a portfolio of stocks from the ranking described above that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund is not permitted to invest in securities issued by companies assigned the Global Industry Classification Standard (GICS) for the tobacco industry.</font> </div> STRATEGIC INFLATION OPPORTUNITIES FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Style Risk</font> &#8211; If at any time the market is not favoring the fund&#8217;s investment style, which is designed for high and rising inflationary cycles, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other funds using different investment styles.</font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Nondiversification</font> &#8211; The fund is classified as nondiversified.&#160;&#160;A nondiversified fund may invest a greater percentage of its assets in a smaller number of securities than a diversified fund. This gives the managers the flexibility to hold large positions in a small number of securities.&#160;&#160;If so, a price change in any one of those securities may have a greater impact on the fund&#8217;s share price than would be the case for a diversified fund.</font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Real Interest Rate Risk</font> &#8211; Inflation-indexed securities trade at prevailing real, or after-inflation, interest rates. Changes in real interest rates affect the value of such securities. Generally, when real interest rates rise, the value of the fund&#8217;s fixed-income securities will decline. The opposite is true when real interest rates decline.</font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Credit Risk</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8211; The value of the fund&#8217;s fixed-income securities will be affected adversely by any erosion, or perceived erosion, in the ability of the issuers of these securities to make interest and principal payments as they become due.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Foreign Securities Risk</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8211; The fund invests in foreign securities, which are generally riskier than U.S. securities. As a result, the fund is subject to foreign risk, meaning that political events (such as civil unrest, national elections and imposition of exchange controls), social and economic events (such as labor strikes and rising inflation), and natural disasters occurring in a country where the fund invests could cause the fund&#8217;s investments in that country to experience gains or losses. Because of these risks, and others, securities of foreign issuers may be less liquid, more volatile, and harder to value than U.S. securities.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Currency Risk</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8211; The fund is subject to the risk of a decline in the value of a foreign currency versus the U.S. dollar, which reduces the dollar value of securities denominated in that currency. The overall impact on the fund&#8217;s holdings may be significant depending on the currencies represented in the portfolio, how each one appreciates or depreciates in relation to the U.S. dollar, and whether currency positions are hedged. Currency trends can be volatile, and to the extent the fund purchases and sells currencies, it will also be subject to the risk that its trading strategies, including efforts at hedging, will not succeed.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Commodity and Gold Investing Risk</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8211; The fund&#8217;s commodity- and gold-related investments may be subject to greater volatility than investments in traditional securities.&#160;&#160;The value of the fund&#8217;s commodity- and gold-related investments may be affected by changes in overall market movements, interest rate changes, and volatility in commodity- and gold-related indexes. The value of these investments may also be affected by factors affecting a particular commodity, such as weather, disease, embargoes, tariffs, taxes and economic, political and regulatory developments.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Real Estate Investing</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8212;</font><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt">An investment in the fund may be subject to many of the same risks as a direct investment in real estate. These risks include changes in economic conditions, interest rates, property values, property tax increases, overbuilding and increased competition, environmental contamination, zoning and natural disasters. This is due to the fact that the value of the fund&#8217;s investments may be affected by the value of the real estate owned by the companies in which it invests.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font></font> </td> <td valign="top" width="89%"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Emerging Market Risk</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8212;</font><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt">Investing in securities of companies located in</font> <font style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">emerging market</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">countries generally is also riskier than investing in securities of companies located in foreign developed countries. Emerging market countries may have unstable governments and/or economies that are subject to sudden change. These changes may be magnified by the countries&#8217; emergent financial markets, resulting in significant volatility to investments in these countries.</font></font></font> </td> </tr> </table> <br/><table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Derivative Risk</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8212;</font><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt">The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional instruments. Derivatives are subject to a number of risks, including liquidity, interest rate, market, credit and correlation risk.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Liquidity Risk</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8212; The fund may also be subject to liquidity risk. During periods of market turbulence or unusually low trading activity, in order to meet redemptions it may be necessary for the fund to sell securities at prices that could have an adverse effect on the fund&#8217;s share price.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Market Risk</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Price Volatility</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font></font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Principal Loss</font> <font style="DISPLAY: inline; FONT-SIZE: 10pt">&#8211; 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></font> </div> </div> </td> </tr> </table> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. Nondiversification - The fund is classified as nondiversified.A nondiversified fund may invest a greater percentage of its assets in a smaller number of securities than a diversified fund. This gives the managers the flexibility to hold large positions in a small number of securities.If so, a price change in any one of those securities may have a greater impact on the fund's share price than would be the case for a diversified fund. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><a id="new_id-0" name="_45748_45749"> <!--EFPlaceholder--></a>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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns -0.0220 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000028150Member column rr_ProspectusShareClassAxis compact acqef_C000086055Member row primary compact * ~ Highest Performance Quarter 0.0413 2011-03-31 Lowest Performance Quarter -0.0783 2011-09-30 Investor Class year-to-date 0.0409 2012-09-30 <div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(1Q 2011): 4.13%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(3Q 2011): -7.83%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">most recent calendar quarter end,</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">the fund&#8217;s Investor Class year-to-</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">date return was 4.09%.</font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 -0.0220 0.0161 -0.0268 0.0112 -0.0140 0.0111 -0.0197 0.0178 -0.0797 -0.0219 -0.0311 0.0059 -0.0266 0.0107 0.0007 0.0010 2010-04-30 2010-04-30 2010-04-30 2010-04-30 2010-04-30 2010-04-30 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000028150Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 17 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0108 0.0088 0.0108 0.0108 0.0108 0.0000 0.0000 0.0025 0.0100 0.0050 0.0001 0.0001 0.0001 0.0001 0.0001 0.0010 0.0010 0.0010 0.0010 0.0010 0.0119 0.0099 0.0144 0.0219 0.0169 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000028150Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000028150Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 17 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 122 378 655 1443 101 316 548 1213 713 1005 1317 2199 223 686 1175 2520 172 533 919 1996 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000028150Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks total real return.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><a id="new_id" name="_23435_23436"> <!--EFPlaceholder--></a>The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 80% of the average value of its portfolio.</font> </div> 0.80 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund&#8217;s asset allocation strategy seeks to diversify its investments among U.S. Treasury inflation-indexed securities, commodity-related investments and non-U.S. dollar investments in an effort to provide investors total real return, which is total return reduced by the expected impact of inflation. The fund&#8217;s investment strategy has been designed in an effort to protect the fund&#8217;s investors from the effects of rising U.S. inflation. Generally, the portfolio managers intend to diversify the fund&#8217;s investments as indicated in the following table. The table indicates the fund&#8217;s neutral mix, that is, how the fund&#8217;s investments generally will be allocated among its major asset classes over the long term, and the ranges within which the portfolio managers may make tactical allocations as a result of changing economic conditions or the portfolio managers&#8217; inflation expectations. The portfolio managers will regularly review the fund&#8217;s asset mix and adjust the allocation among asset classes as necessary to provide the fund what they believe is the most favorable outlook for achieving the fund&#8217;s objective. By adjusting the allocation among asset classes the portfolio managers can moderate risks associated with each asset category.</font> </div> <br/><table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td valign="bottom" width="25%" style="BORDER-BOTTOM: black 2px solid"> &#160; </td> <td valign="bottom" width="25%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">U.S. Inflation-Indexed and other</font> </div> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">U.S. Fixed-Income Securities</font> </div> </div> </td> <td valign="bottom" width="20%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Commodity-Related</font> </div> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Investments (excluding gold-related investments)</font> </div> </div> </td> <td valign="bottom" width="20%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Non-U.S. Dollar</font> </div> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Investments</font> </div> </div> </td> </tr> <tr> <td valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Neutral Mix</font> </div> </div> </td> <td valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">50%</font> </div> </div> </td> <td valign="top" width="20%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">25%</font> </div> </div> </td> <td valign="top" width="20%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">25%</font> </div> </div> </td> </tr> <tr> <td valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Operating Ranges</font> </div> </div> </td> <td valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">30-70%</font> </div> </div> </td> <td valign="top" width="20%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">15-35%</font> </div> </div> </td> <td valign="top" width="20%" style="BORDER-BOTTOM: black 2px solid"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">15-35%</font> </div> </div> </td> </tr> </table> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">In addition to the investment categories indicated in the table above, by making tactical allocation adjustments within the above operating ranges, the fund may also invest up to 10% in each of the following additional investment categories:</font> </div> <br/><table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Equity securities of U.S. and foreign companies engaged in gold-related businesses and investments that provide investment exposure to underlying investible gold, including through exchange traded funds (ETFs) or other pooled investment funds that invest in underlying gold or that seek to track the performance of a gold index; and</font> </div> </div> </td> </tr> <tr> <td valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </div> </td> <td valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Real estate investment trusts (REITs), REIT ETFs and equity securities issued by companies engaged in the real estate industry.</font> </div> </div> </td> </tr> </table> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">To help protect against U.S. inflation, the fund will invest a portion of its assets in inflation-indexed debt securities. These securities include inflation-indexed U.S. Treasury securities, inflation-indexed securities issued by U.S. government agencies and instrumentalities other than the U.S. Treasury, and inflation-indexed securities issued by other entities such as corporations. Inflation-indexed securities are designed to protect the future purchasing power of the money invested in them.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers may also purchase U.S. Treasury securities, U.S. Treasury futures, and other U.S. fixed-income securities that are not linked to inflation whether issued by the U.S. government, its agencies or instrumentalities, corporations or other non-governmental issuers. A portion of these investments may be in high-yield securities. The fund also may invest in derivative instruments such as options, futures contracts, options on futures contracts, and swap agreements (including, but not limited to, credit default swap agreements), or in mortgage- or asset-backed securities, provided that such instruments are in keeping with the fund&#8217;s investment objective.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund also will invest a portion of its assets in commodity-related investments. Commodities are assets that have tangible properties, such as oil, metals and agricultural products. Under normal market conditions, the fund&#8217;s commodity-related investments will be allocated between equity securities of U.S. and foreign companies engaged in commodity-related businesses and investments that provide investment exposure to underlying investible commodities.&#160;&#160;Investments in equity securities of foreign companies engaged in commodity-related businesses do not apply to the fund&#8217;s neutral mix or operating range for non-U.S. dollar investments. To achieve exposure to underlying commodities, the fund may invest in commodity-linked notes, commodity-related exchange traded notes (ETNs), and exchange traded funds (ETFs) or other pooled investment funds that invest in underlying commodities or that seek to track the performance of a commodity or resource index.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund also will invest a portion of its assets in debt securities of foreign issuers, including issuers located in <font style="FONT-STYLE: normal; DISPLAY: inline; FONT-WEIGHT: normal">emerging markets</font>.&#160;&#160;In managing the fund&#8217;s non-U.S. dollar investments, the fund will buy and sell foreign currencies regularly, either in the spot (i.e., cash) market or with <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-WEIGHT: bold">foreign currency forward contracts</font>.</font> </div> <br/><table border="0" cellpadding="0" cellspacing="0" id="hangingindent-5" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr valign="top" style="LINE-HEIGHT: 1.25;"> <td width="10%" style="WIDTH: 72pt"> <div> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160;</font> </div> </td> <td width="80%"> <div align="left"> <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-WEIGHT: bold">Foreign currency forward contracts</font> are agreements to exchange a specific amount of one currency for a specified amount of another at a future date. The date may be any agreed fixed number of days in the future. The amount of currency to be exchanged, the price at which the exchange will take place, and the date of the exchange are negotiated when the fund enters into the contract and are fixed for the term of the contract. Forward contracts are traded in an interbank market conducted directly between currency traders (usually large commercial banks) and their customers. A forward contract generally has no deposit requirement and is consummated without payment of any commission. However, the fund may enter into forward contracts with deposit requirements or commissions.</font> </div> </td> <td width="10%"> <font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160;</font> </td> </tr> </table> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund may also invest in high-quality non-dollar-denominated foreign government and foreign corporate debt securities, as well as inflation-indexed securities issued by foreign governments and corporations. When the managers believe it is prudent, the fund may also invest a portion of the assets from this portion in equity securities of foreign companies, including issuers located in <font style="FONT-STYLE: normal; DISPLAY: inline; FONT-WEIGHT: normal">emerging markets</font>. Within this non-U.S. dollar portion, the fund may also invest in short-term securities, including money markets, securities issued or guaranteed by the U.S. government and its agencies and instrumentalities, and commercial paper and other U.S. dollar debt investments.</font> </div> SMALL COMPANY FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Small Cap Stocks</font> &#8211; The smaller companies in which the fund invests may be more volatile and subject to greater risk than larger companies. Smaller companies may have limited financial resources, product lines and markets, and their securities may trade less frequently and in more limited volumes than the securities of larger companies, which could lead to higher transaction costs.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Style Risk</font> &#8211; If at any time the market is not favoring the fund&#8217;s quantitative investment style, the fund&#8217;s gains may not be as big as, or its losses may be bigger than, those of other equity funds using different investment styles.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Investment Process Risk</font><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;</font>&#8211; Stocks selected by the portfolio managers using quantitative models may perform differently than expected due to the portfolio managers' judgments regarding the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues with the construction and implementation of the models (including, for example, data problems and/or software or other implementation issues). There is no guarantee that the use of the quantitative model will result in effective investment decisions for the fund. Additionally, the commonality of portfolio holdings across quantitative investment managers may amplify losses.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Benchmark Correlation</font> &#8211; The fund&#8217;s performance will be tied to the performance of its benchmark, the Russell 2000 Index. If the fund&#8217;s benchmark goes down, it is likely that the fund&#8217;s performance will go down.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="89%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;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, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns -0.0400 0.5357 0.2828 0.0713 0.0615 -0.0572 -0.3814 0.2046 0.2707 -0.0077 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000005981Member column rr_ProspectusShareClassAxis compact acqef_C000016484Member row primary compact * ~ Highest Performance Quarter 0.2231 2003-06-30 Lowest Performance Quarter -0.2686 2008-12-31 Investor Class year-to-date 0.1167 2012-09-30 <div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(2Q 2003): 22.31%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(4Q 2008): -26.86%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">As of September 30, 2012, the most</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">recent calendar quarter end, the</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">fund's Investor Class year-to-date</font></font> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">return was 11.67%.</font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 -0.0077 -0.0239 0.0665 -0.0079 -0.0276 0.0592 -0.0048 -0.0204 0.0568 -0.0057 -0.0217 0.0688 -0.0674 -0.0379 0.0577 -0.0180 -0.0338 0.0558 -0.0118 -0.0287 0.0477 -0.0418 0.0015 0.0562 0.0102 0.0194 0.0709 2010-03-01 2003-08-29 1999-10-01 2000-09-07 1998-07-31 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000005981Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in <font style="FONT-STYLE: italic; DISPLAY: inline">Calculation of Sales Charges</font> on page 12 of the fund&#8217;s prospectus and <font style="FONT-STYLE: italic; DISPLAY: inline">Sales Charges</font> in <font style="FONT-STYLE: italic; DISPLAY: inline">Appendix B</font> of the statement of additional information.</font> </div> 0.0000 0.0000 0.0575 0.0000 0.0000 0.0000 0.0000 0.0000 0.0100 0.0000 25 0.00 0.00 0.00 0.00 0.0088 0.0068 0.0088 0.0088 0.0088 0.0000 0.0000 0.0025 0.0100 0.0050 0.0001 0.0001 0.0001 0.0001 0.0001 0.0089 0.0069 0.0114 0.0189 0.0139 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000005981Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000005981Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts, as well as variations in charges that may apply to purchases of $1 million or more, is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information. Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 50000 Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 91 284 494 1096 71 221 385 859 685 917 1167 1881 192 595 1022 2209 142 441 761 1668 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000005981Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks long-term capital growth by investing primarily in stocks of small companies.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 72% of the average value of its portfolio.</font> </div> 0.72 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Under normal market conditions, the fund will invest at least 80% of its assets in stocks of smaller-capitalization U.S. companies. The portfolio managers consider small companies to be those that, at the time of investment, have a market capitalization not greater than that of the largest company in the Russell 2000 Index. The portfolio managers use quantitative management techniques in a two-step process.&#160;&#160;First, the managers rank stocks, primarily smaller U.S. companies, from most attractive to least attractive based on each stock&#8217;s value as well as its growth potential.&#160;&#160;Second, the portfolio managers use a quantitative model to build a portfolio of stocks from the ranking described above that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> UTILITIES FUND Principal Risks <table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Concentration Risk</font> &#8211; The fund concentrates its investments in the utilities industry, which at times may be limited to a relatively small number of securities.&#160;&#160;Therefore, the fund may be subject to greater risks and market fluctuations than a portfolio representing a broader range of industries. The performance of the utilities industry will depend in part on investor perception of the sector relative to other sectors. Companies in the utilities industry are subject to various industry-specific risks.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Foreign Securities Risk</font> &#8211; The fund may invest in foreign securities, which may be riskier than investing in U.S. securities. Securities of foreign issuers may be less liquid, more volatile and harder to value than U.S. securities.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Market Risk</font> &#8211; The value of the fund&#8217;s shares will go up and down based on the performance of the companies whose securities it owns and other factors generally affecting the securities market.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Price Volatility</font> &#8211; The value of the fund&#8217;s shares may fluctuate significantly in the short term.</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Principal Loss</font> &#8211; 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> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Principal Loss - 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. 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. Fund Performance <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;s performance from year to year for Investor Class shares. The table shows how the fund&#8217;s average annual returns for the periods shown compared with those of a broad measure of market performance. The fund&#8217;s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&#160;&#160;For current performance information, please visit americancentury.com.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> Calendar Year Total Returns -0.2744 0.2396 0.2381 0.1430 0.2499 0.1782 -0.3112 0.1448 0.1114 0.1112 ~ http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact acqef_S000005982Member column rr_ProspectusShareClassAxis compact acqef_C000016488Member row primary compact * ~ Highest Performance Quarter 0.1777 2003-06-30 Lowest Performance Quarter -0.1727 2008-09-30 Investor Class year-to-date 0.0951 2012-09-30 <div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: normal"><font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Highest Performance Quarter</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(2Q 2003): 17.77%</font></font></font></font></font> </div> <br/><div> <font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: normal"><font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Lowest Performance Quarter</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">(3Q 2008): -17.27%</font></font></font></font></font> </div> <br/><div> <font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: normal"><font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">As of September 30, 2012, the most</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">recent calendar quarter end, the fund&#8217;s</font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">Investor Class year-to-date return was</font></font></font> <font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: normal">9.51%.</font></font></font></font></font> </div> Average Annual Total Returns For the calendar year ended December 31, 2011 0.1112 0.0279 0.0620 0.1044 0.0227 0.0563 0.0808 0.0232 0.0526 0.0211 -0.0025 0.0292 0.1246 0.0171 0.0396 ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact acqef_S000005982Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~ <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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&#8217;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> 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. 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 fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. 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. americancentury.com 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. Fees and Expenses <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following table describes the fees and expenses you may pay if you buy and hold shares of the fund.</font> </div> 25 0.0068 0.0000 0.0000 0.0068 ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact acqef_S000005982Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact acqef_S000005982Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) Shareholder Fees (fees paid directly from your investment) Example <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">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> 70 218 379 847 ~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact acqef_S000005982Member column rr_ProspectusShareClassAxis compact * row primary compact * ~ 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: Investment Objective <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The fund seeks current income and long-term growth of capital and income. The fund invests at least 80% of its assets in equity securities of companies engaged in the utilities industry.</font> </div> Portfolio Turnover <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the fund&#8217;s portfolio turnover rate was 55% of the average value of its portfolio.</font> </div> 0.55 Principal Investment Strategies <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Under normal market conditions, the fund invests at least 80% of its assets in equity securities of companies engaged in the utilities industry. The managers consider a company to be engaged in the utilities industry if</font> </div> <br/><table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">the company&#8217;s securities are listed in at least one index that is made up exclusively of companies engaged in one or more of the following industries: electricity, natural gas, telecommunications services, cable television, water or sanitation services; or</font> </div> </td> </tr> <tr> <td align="left" valign="top" width="1%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#8226;</font> </div> </td> <td align="left" valign="top" width="88%"> <div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">the company derives 50% or more of its revenues or net profits from the ownership or operation of facilities used to provide electricity, natural gas, telecommunications services, cable television, water or sanitation services.</font> </div> </td> </tr> </table> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers use quantitative and qualitative management techniques as well as risk controls to construct the fund&#8217;s portfolio. The quantitative process involves ranking stocks based on their growth and valuation characteristics. This ranking may be modified by the portfolio managers after they evaluate qualitative factors such as regulatory environment, industry conditions and</font> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">company specific events. Finally, the managers use a quantitative model to build a portfolio of stocks that they believe will provide the optimal balance between risk and expected return.</font> </div> <br/><div style="LINE-HEIGHT: 1.25; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"> <font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The portfolio managers generally sell a stock when they believe it has become less attractive relative to other opportunities, its risk characteristics outweigh its return opportunity or specific events alter its prospects.</font> </div> Under normal market conditions, the fund invests at least 80% of its total assets in equity securities of companies engaged in the utilities industry. The fund concentrates its investments in the utilities industry, which at times may be limited to a relatively small number of securities. Therefore, the fund may be subject to greater risks and market fluctuations than a portfolio representing a broader range of industries. The performance of the utilities industry will depend in part on investor perception of the sector relative to other sectors. Companies in the utilities industry are subject to various industry-specific risks.