Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.06 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.06 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Consumer Discretionary ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Consumer Discretionary ETF. This example assumes that Consumer Discretionary ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of consumer discretionary stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 6%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the consumer discretionary sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the consumer discretionary sector could be affected by, among other things, overall economic conditions, interest rates, consumer confidence, and disposable income.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Consumer Discretionary ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Consumer Discretionary ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Consumer Discretionary ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Consumer Discretionary ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Consumer Discretionary ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Consumer Discretionary ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Consumer Discretionary 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the consumer discretionary sector, as classified under the Global Industry Classification Standard (GICS). The GICS consumer discretionary sector is made up of those manufacturing and service industries that tend to be the most sensitive to economic cycles. Its manufacturing segment includes the following industries: automotive, household durable goods, textiles and apparel, and leisure equipment. The services segment includes hotels, restaurants and other leisure facilities, media production and services, and consumer retailing.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of consumer discretionary stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 6%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the consumer discretionary sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the consumer discretionary sector could be affected by, among other things, overall economic conditions, interest rates, consumer confidence, and disposable income.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Consumer Discretionary 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the consumer discretionary sector, as classified under the Global Industry Classification Standard (GICS). The GICS consumer discretionary sector is made up of those manufacturing and service industries that tend to be the most sensitive to economic cycles. Its manufacturing segment includes the following industries: automotive, household durable goods, textiles and apparel, and leisure equipment. The services segment includes hotels, restaurants and other leisure facilities, media production and services, and consumer retailing.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004446ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004446Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004446ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004446Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004446PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004446Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004446PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004446Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004446OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004446Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004446OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004446Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004446ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004446Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004446ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004446Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.07 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.07 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Consumer Staples ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Consumer Staples ETF. This example assumes that Consumer Staples ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of consumer staples stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 7%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the consumer staples sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the consumer staples sector could be affected by, among other things, consumer tastes, government regulation, marketing, and consumer confidence.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Consumer Staples ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Consumer Staples ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Consumer Staples ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Consumer Staples ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Consumer Staples ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Consumer Staples ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Consumer Staples 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the consumer staples sector, as classified under the Global Industry Classification Standard (GICS). The GICS consumer staples sector is made up of companies whose businesses are less sensitive to economic cycles. It includes manufacturers and distributors of food, beverages, and tobacco, as well as producers of nondurable household goods and personal products. It also includes food and drug retailing companies as well as hypermarkets and consumer supercenters.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of consumer staples stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 7%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the consumer staples sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the consumer staples sector could be affected by, among other things, consumer tastes, government regulation, marketing, and consumer confidence.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Consumer Staples 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the consumer staples sector, as classified under the Global Industry Classification Standard (GICS). The GICS consumer staples sector is made up of companies whose businesses are less sensitive to economic cycles. It includes manufacturers and distributors of food, beverages, and tobacco, as well as producers of nondurable household goods and personal products. It also includes food and drug retailing companies as well as hypermarkets and consumer supercenters.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004447ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004447Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004447ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004447Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004447PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004447Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004447PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004447Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004447OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004447Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004447OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004447Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004447ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004447Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004447ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004447Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.12 2012-12-27 This policy may be changed only upon 60 days| notice to shareholders. Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.12 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Energy ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Energy ETF. This example assumes that Energy ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of energy stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 12%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the energy sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the energy sector could be affected by, among other things, geopolitical events, government regulation, economic cycles, and fuel prices.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Energy ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an Energy ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Energy ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Energy ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Energy ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Energy ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/ Energy 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the energy sector, as classified under the Global Industry Classification Standard (GICS). The GICS energy sector is made up of companies whose businesses are dominated by either of the following activities: the construction or provision of oil rigs, drilling equipment, and other energy-related equipment and services (such as seismic data collection); or companies engaged in the exploration, production, marketing, refining, and/or transportation of oil and gas products.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of energy stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 12%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p><p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the energy sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the energy sector could be affected by, among other things, geopolitical events, government regulation, economic cycles, and fuel prices.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/ Energy 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the energy sector, as classified under the Global Industry Classification Standard (GICS). The GICS energy sector is made up of companies whose businesses are dominated by either of the following activities: the construction or provision of oil rigs, drilling equipment, and other energy-related equipment and services (such as seismic data collection); or companies engaged in the exploration, production, marketing, refining, and/or transportation of oil and gas products.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004448ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004448Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004448ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004448Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004448PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004448Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004448PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004448Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004448OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004448Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004448OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004448Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004448ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004448Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004448ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004448Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.47 2012-12-27 reflects no deduction for fees, expenses, or taxes Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.47 2012-12-27 reflects no deduction for fees, expenses, or taxes <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Extended Duration Treasury ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Extended Duration Treasury ETF. This example assumes that Extended Duration Treasury ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of an index of extended-duration zero-coupon U.S. Treasury securities.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 47%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall bond market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates. Interest rate risk is expected to be extremely high for the Fund because it invests primarily in zero-coupon long-term bonds, which have prices that are even more sensitive to interest rate changes than are coupon-bearing bonds of similar maturity. Because the Fund invests primarily in Treasury STRIPS with maturities ranging from 20 to 30 years, rising interest rates may cause the value of the Fund's investments to decline significantly.</p><p>Index sampling risk, which is the chance that the securities selected for the Fund, in the aggregate, will not provide investment performance matching that of the Fund's target index. Index sampling risk for the Fund should be low.</p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Extended Duration Treasury ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an Extended Duration Treasury ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Extended Duration Treasury ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Extended Duration Treasury ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Extended Duration Treasury ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Extended Duration Treasury ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the Barclays U.S. Treasury STRIPS 20-30 Year Equal Par Bond Index. This Index includes zero-coupon U.S. Treasury securities (Treasury STRIPS) with maturities ranging from 20 to 30 years. A Treasury STRIP represents a single coupon payment, or a single principal payment, from a U.S. Treasury security that has been 'stripped' into separately tradable components.</p><p>The Fund invests by sampling the Index, meaning that it holds a range of securities that, in the aggregate, approximates the full Index in terms of key risk factors, including duration and other characteristics. All of the Fund's investments will be selected through the sampling process, and at least 80% of the Fund's assets will be invested in U.S. Treasury securities held in the Index. The Fund maintains a dollar-weighted average maturity consistent with that of the Index, which generally ranges between 20 and 30 years. The Fund is expected to have a duration that is greater than 20 years.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares(including operating expenses but excluding shareholder fees) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares (including operating expenses and any applicable shareholder fees) compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Examples</p> <p>The following examples are intended to help you compare the cost of investing in the Fund's Institutional Shares or Institutional Plus Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. These examples assume that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Institutional Shares or Institutional Plus Shares of the Fund.</p> <p>The Fund seeks to track the performance of an index of extended-duration zero-coupon U.S. Treasury securities.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 47%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall bond market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates. Interest rate risk is expected to be extremely high for the Fund because it invests primarily in zero-coupon long-term bonds, which have prices that are even more sensitive to interest rate changes than are coupon-bearing bonds of similar maturity. Because the Fund invests primarily in Treasury STRIPS with maturities ranging from 20 to 30 years, rising interest rates may cause the value of the Fund's investments to decline significantly.</p><p>Index sampling risk, which is the chance that the securities selected for the Fund, in the aggregate, will not provide investment performance matching that of the Fund's target index. Index sampling risk for the Fund should be low.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the Barclays U.S. Treasury STRIPS 20-30 Year Equal Par Bond Index. This Index includes zero-coupon U.S. Treasury securities (Treasury STRIPS) with maturities ranging from 20 to 30 years. A Treasury STRIP represents a single coupon payment, or a single principal payment, from a U.S. Treasury security that has been 'stripped' into separately tradable components.</p><p>The Fund invests by sampling the Index, meaning that it holds a range of securities that, in the aggregate, approximates the full Index in terms of key risk factors, including duration and other characteristics. All of the Fund's investments will be selected through the sampling process, and at least 80% of the Fund's assets will be invested in U.S. Treasury securities held in the Index. The Fund maintains a dollar-weighted average maturity consistent with that of the Index, which generally ranges between 20 and 30 years. The Fund is expected to have a duration that is greater than 20 years.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000018789ShareholderFeesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000018789Member ~ </div> <div style="display:none">~ http://vanguard/role/S000018789ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000018789Member ~ </div> <div style="display:none">~ http://vanguard/role/S000018789PerformanceTableDataInstitutional column primary compact * row dei_LegalEntityAxis compact vanguard_S000018789Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000018789PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000018789Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000018789OperatingExpensesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000018789Member ~ </div> <div style="display:none">~ http://vanguard/role/S000018789OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000018789Member ~ </div> <div style="display:none">~ http://vanguard/role/S000018789ExpenseExampleNoRedemptionInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000018789Member ~ </div> <div style="display:none">~ http://vanguard/role/S000018789ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000018789Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.07 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.07 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Financials ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Financials ETF. This example assumes that Financials ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund. 'Acquired Fund Fees and Expenses' are expenses incurred indirectly by the Fund through its ownership of shares in other investment companies, such as business development companies. Business development company expenses are similar to the expenses paid by any operating company held by the Fund. They are not direct costs paid by Fund shareholders and are not used to calculate the Fund's net asset value. They have no impact on the costs associated with fund operations. </p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of financial stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 7%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the financials sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the financials sector could be affected by, among other things, government regulation, interest rates, cost of capital funds, credit losses, and financial markets.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Financials ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Financials ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Financials ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Financials ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Financials ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Financials ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Financials 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the financials sector, as classified under the Global Industry Classification Standard (GICS). The GICS financials sector is made up of companies involved in activities such as banking, mortgage finance, consumer finance, specialized finance, investment banking and brokerage, asset management and custody, corporate lending, insurance, financial investment, and real estate (including real estate investment trusts).</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund. 'Acquired Fund Fees and Expenses' are expenses incurred indirectly by the Fund through its ownership of shares in other investment companies, such as business development companies. Business development company expenses are similar to the expenses paid by any operating company held by the Fund. They are not direct costs paid by Fund shareholders and are not used to calculate the Fund's net asset value. They have no impact on the costs associated with fund operations.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of financial stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 7%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the financials sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the financials sector could be affected by, among other things, government regulation, interest rates, cost of capital funds, credit losses, and financial markets.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Financials 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the financials sector, as classified under the Global Industry Classification Standard (GICS). The GICS financials sector is made up of companies involved in activities such as banking, mortgage finance, consumer finance, specialized finance, investment banking and brokerage, asset management and custody, corporate lending, insurance, financial investment, and real estate (including real estate investment trusts).</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004449ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004449Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004449ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004449Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004449PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004449Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004449PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004449Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004449OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004449Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004449OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004449Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004449ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004449Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004449ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004449Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.45 2012-12-27 (reflects no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.45 2012-12-27 (reflect no deduction for fees or expenses) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.45 2012-12-27 (reflects no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Institutional Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Institutional Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large- and mid-capitalization stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 45%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that the stocks selected for the FTSE4Good US Select Index will, in the aggregate, trail returns of other mutual funds screened with similar criteria, of other asset classes, or of the overall stock market. Historically, mid-cap stocks, which make up part of the Index, have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the FTSE4Good US Select Index. The Index is composed primarily of large- and mid-cap stocks that have been screened for certain social and environmental criteria by the Index sponsor, which is independent of Vanguard. The Fund attempts to replicate the Index by investing all, or substantially all, of its assets in the stocks that make up the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future.</p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Investor Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Investor Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large- and mid-capitalization stocks.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 45%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that the stocks selected for the FTSE4Good US Select Index will, in the aggregate, trail returns of other mutual funds screened with similar criteria, of other asset classes, or of the overall stock market. Historically, mid-cap stocks, which make up part of the Index, have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the FTSE4Good US Select Index. The Index is composed primarily of large- and mid-cap stocks that have been screened for certain social and environmental criteria by the Index sponsor, which is independent of Vanguard. The Fund attempts to replicate the Index by investing all, or substantially all, of its assets in the stocks that make up the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Investor Shares compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Investor Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Investor Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large- and mid-capitalization stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 45%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that the stocks selected for the FTSE4Good US Select Index will, in the aggregate, trail returns of other mutual funds screened with similar criteria, of other asset classes, or of the overall stock market. Historically, mid-cap stocks, which make up part of the Index, have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the FTSE4Good US Select Index. The Index is composed primarily of large- and mid-cap stocks that have been screened for certain social and environmental criteria by the Index sponsor, which is independent of Vanguard. The Fund attempts to replicate the Index by investing all, or substantially all, of its assets in the stocks that make up the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004440ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004440ShareholderFeesParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004440ShareholderFeesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004440PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004440PerformanceTableDataInstitutional column primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004440PerformanceTableDataParticipant column primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004440OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004440OperatingExpensesParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004440OperatingExpensesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004440ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004440ExpenseExampleNoRedemptionParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004440ExpenseExampleNoRedemptionInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004440Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.09 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.09 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Health Care ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Health Care ETF. This example assumes that Health Care ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of health care stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 9%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the health care sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the health care sector could be affected by, among other things, patent protection, government regulation, research and development costs, litigation, and competitive forces.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Health Care ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Health Care ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Health Care ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Health Care ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Health Care ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Health Care ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Health Care 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the health care sector, as classified under the Global Industry Classification Standard (GICS). The GICS health care sector is made up of two main industry groups. The first group includes companies that manufacture health care equipment and supplies or provide health care-related services (such as distributors of health care products, providers of basic health care services, and owners and operators of health care facilities and organizations). The second group includes companies primarily involved in the research, development, production, and marketing of pharmaceuticals and biotechnology products.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of health care stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 9%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the health care sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the health care sector could be affected by, among other things, patent protection, government regulation, research and development costs, litigation, and competitive forces.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Health Care 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the health care sector, as classified under the Global Industry Classification Standard (GICS). The GICS health care sector is made up of two main industry groups. The first group includes companies that manufacture health care equipment and supplies or provide health care-related services (such as distributors of health care products, providers of basic health care services, and owners and operators of health care facilities and organizations). The second group includes companies primarily involved in the research, development, production, and marketing of pharmaceuticals and biotechnology products.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004450ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004450Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004450ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004450Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004450PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004450Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004450PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004450Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004450OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004450Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004450OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004450Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004450ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004450Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004450ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004450Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.06 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.06 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Industrials ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Industrials ETF. This example assumes that Industrials ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of industrial stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 6%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the industrials sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the industrials sector could be affected by, among other things, government regulation, world events and economic conditions, insurance costs, and labor relations.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Industrials ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an Industrials ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Industrials ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Industrials ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Industrials ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Industrials ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Industrials 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the industrials sector, as classified under the Global Industry Classification Standard (GICS). The GICS industrials sector is made up of companies whose businesses are dominated by one of the following activities: the manufacture and distribution of capital goods (including aerospace and defense; construction, engineering, and building products; electrical equipment; and industrial machinery); the provision of commercial services and supplies (including printing, employment, environmental, and office services); or the provision of transportation services (including airlines, couriers, marine, road, and rail) and transportation infrastructure.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of industrial stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 6%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the industrials sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the industrials sector could be affected by, among other things, government regulation, world events and economic conditions, insurance costs, and labor relations.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Industrials 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the industrials sector, as classified under the Global Industry Classification Standard (GICS). The GICS industrials sector is made up of companies whose businesses are dominated by one of the following activities: the manufacture and distribution of capital goods (including aerospace and defense; construction, engineering, and building products; electrical equipment; and industrial machinery); the provision of commercial services and supplies (including printing, employment, environmental, and office services); or the provision of transportation services (including airlines, couriers, marine, road, and rail) and transportation infrastructure.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004451ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004451Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004451ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004451Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004451PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004451Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004451PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004451Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004451OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004451Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004451OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004451Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004451ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004451Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004451ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004451Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.06 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.06 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Information Technology ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Information Technology ETF. This example assumes that Information Technology ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of information technology stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 6%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the information technology sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the information technology sector could be affected by, among other things, overall economic conditions, short product cycles, rapid obsolescence of products, competition, and government regulation.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Information Technology ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an Information Technology ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Information Technology ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Information Technology ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Information Technology ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Information Technology ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Information Technology 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the information technology sector, as classified under the Global Industry Classification Standard (GICS). The GICS information technology sector is made up of companies in the following three general areas: technology software and services, including companies that primarily develop software in various fields (such as the Internet, applications, systems, databases, management, and/or home entertainment) and companies that provide information technology consulting and services, data processing, and outsourced services; technology hardware and equipment, including manufacturers and distributors of communications equipment, computers and peripherals, electronic equipment, and related instruments; and semiconductors and semiconductor equipment manufacturers.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of information technology stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 6%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the information technology sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the information technology sector could be affected by, among other things, overall economic conditions, short product cycles, rapid obsolescence of products, competition, and government regulation.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Information Technology 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the information technology sector, as classified under the Global Industry Classification Standard (GICS). The GICS information technology sector is made up of companies in the following three general areas: technology software and services, including companies that primarily develop software in various fields (such as the Internet, applications, systems, databases, management, and/or home entertainment) and companies that provide information technology consulting and services, data processing, and outsourced services; technology hardware and equipment, including manufacturers and distributors of communications equipment, computers and peripherals, electronic equipment, and related instruments; and semiconductors and semiconductor equipment manufacturers.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004452ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004452Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004452ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004452Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004452PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004452Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004452PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004452Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004452OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004452Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004452OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004452Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004452ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004452Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004452ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004452Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.30 2012-12-27 (reflect no deduction for fees or expenses) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.30 2012-12-27 (reflect no deduction for fees and expenses) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.30 2012-12-27 (reflect no deduction for fees or expenses) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Investor Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Investor Shares of the Fund.</p> <p>The Fund seeks to provide long-term capital appreciation.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 30%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of global stock markets. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Investment style risk, which is the chance that returns from non-U.S. growth stocks and, to the extent that the Fund is invested in them, small- and mid-cap stocks, will trail returns from global stock markets. Historically, non-U.S. small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the global markets, and they often perform quite differently.</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. In addition, investments in foreign stocks can be riskier than U.S. stock investments. The prices of foreign stocks and the prices of U.S. stocks have, at times, moved in opposite directions. </p><p>Country/regional risk, which is the chance that world events-such as political upheaval, financial troubles, or natural disasters-will adversely affect the value of securities issued by companies in foreign countries or regions. Because the Fund may invest a large portion of its assets in securities of companies located in any one country or region, including emerging markets, the Fund's performance may be hurt disproportionately by the poor performance of its investments in that area. Country/regional risk is especially high in emerging markets.</p><p>Currency risk, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates. Currency risk is especially high in emerging markets.</p><p>Manager risk, which is the chance that poor security selection or focus on securities in a particular sector, category, or group of companies will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund invests predominantly in the stocks of companies located outside the United States and is expected to diversify its assets across developed and emerging markets in Europe, the Far East, and Latin America. In selecting stocks, the Fund's advisors evaluate foreign markets around the world and choose large-, mid-, and small-capitalization companies considered to have above-average growth potential. The Fund uses multiple investment advisors. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to provide long-term capital appreciation.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 30%.</p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of global stock markets. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Investment style risk, which is the chance that returns from non-U.S. growth stocks and, to the extent that the Fund is invested in them, small- and mid-cap stocks, will trail returns from global stock markets. Historically, non-U.S. small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the global markets, and they often perform quite differently.</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. In addition, investments in foreign stocks can be riskier than U.S. stock investments. The prices of foreign stocks and the prices of U.S. stocks have, at times, moved in opposite directions. </p><p>Country/regional risk, which is the chance that world events-such as political upheaval, financial troubles, or natural disasters-will adversely affect the value of securities issued by companies in foreign countries or regions. Because the Fund may invest a large portion of its assets in securities of companies located in any one country or region, including emerging markets, the Fund's performance may be hurt disproportionately by the poor performance of its investments in that area. Country/regional risk is especially high in emerging markets.</p><p>Currency risk, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates. Currency risk is especially high in emerging markets.</p><p>Manager risk, which is the chance that poor security selection or focus on securities in a particular sector, category, or group of companies will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund invests predominantly in the stocks of companies located outside the United States and is expected to diversify its assets across developed and emerging markets in Europe, the Far East, and Latin America. In selecting stocks, the Fund's advisors evaluate foreign markets around the world and choose large-, mid-, and small-capitalization companies considered to have above-average growth potential. The Fund uses multiple investment advisors. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Examples</p> <p>The following examples are intended to help you compare the cost of investing in the Fund's Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. These examples assume that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Investor Shares or Admiral Shares of the Fund.</p> <p>The Fund seeks to provide long-term capital appreciation.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class. After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 30%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of global stock markets. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Investment style risk, which is the chance that returns from non-U.S. growth stocks and, to the extent that the Fund is invested in them, small- and mid-cap stocks, will trail returns from global stock markets. Historically, non-U.S. small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the global markets, and they often perform quite differently.</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. In addition, investments in foreign stocks can be riskier than U.S. stock investments. The prices of foreign stocks and the prices of U.S. stocks have, at times, moved in opposite directions. </p><p>Country/regional risk, which is the chance that world events-such as political upheaval, financial troubles, or natural disasters-will adversely affect the value of securities issued by companies in foreign countries or regions. Because the Fund may invest a large portion of its assets in securities of companies located in any one country or region, including emerging markets, the Fund's performance may be hurt disproportionately by the poor performance of its investments in that area. Country/regional risk is especially high in emerging markets. </p><p>Currency risk, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates. Currency risk is especially high in emerging markets.</p><p>Manager risk, which is the chance that poor security selection or focus on securities in a particular sector, category, or group of companies will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund invests predominantly in the stocks of companies located outside the United States and is expected to diversify its assets across developed and emerging markets in Europe, the Far East, and Latin America. In selecting stocks, the Fund's advisors evaluate foreign markets around the world and choose large-, mid-, and small-capitalization companies considered to have above-average growth potential. The Fund uses multiple investment advisors. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. </p> <p> Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class. </p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004453ShareholderFeesParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004453ShareholderFeesParticipant2 column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004453ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004453PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004453PerformanceTableDataParticipant column primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004453PerformanceTableDataParticipant2 column primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004453OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004453OperatingExpensesParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004453OperatingExpensesParticipant2 column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004453ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004453ExpenseExampleNoRedemptionParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004453ExpenseExampleNoRedemptionParticipant2 column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004453Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.07 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.07 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Materials ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Materials ETF. This example assumes that Materials ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of materials stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 7%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the materials sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the materials sector could be affected by, among other things, commodity prices, government regulation, inflation expectations, resource availability, and economic cycles.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Materials ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Materials ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Materials ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Materials ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Materials ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Materials ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Materials 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the materials sector, as classified under the Global Industry Classification Standard (GICS). The GICS materials sector is made up of companies in a wide range of commodity-related manufacturing industries. Included within this sector are companies that manufacture chemicals, construction materials, glass, paper, forest products, and related packaging products, as well as metals, minerals, and mining companies, including producers of steel.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of materials stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 7%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the materials sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the materials sector could be affected by, among other things, commodity prices, government regulation, inflation expectations, resource availability, and economic cycles.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Materials 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the materials sector, as classified under the Global Industry Classification Standard (GICS). The GICS materials sector is made up of companies in a wide range of commodity-related manufacturing industries. Included within this sector are companies that manufacture chemicals, construction materials, glass, paper, forest products, and related packaging products, as well as metals, minerals, and mining companies, including producers of steel.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004441ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004441Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004441ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004441Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004441PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004441Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004441PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004441Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004441OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004441Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004441OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004441Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004441ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004441Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004441ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004441Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.16 2012-12-27 (reflects no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.16 2012-12-27 (reflects no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>The following example is intended to help you compare the cost of investing in MegaCap 300 Growth ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in MegaCap 300 Growth ETF. This example assumes that MegaCap 300 Growth ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p><p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large-capitalization growth stocks in the United States.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 16%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p><p>An investment in the Fund, however, could lose money over short, intermediate, or even long periods of time because the Fund allocates its assets worldwide across different asset classes and investments with specific risk and return characteristics.</p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that returns from large-capitalization growth stocks will trail returns from the overall stock market. Large-cap growth stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Mega Cap 300 Growth ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Mega Cap 300 Growth ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Mega Cap 300 Growth ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Mega Cap 300 Growth ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Mega Cap 300 Growth ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers'(which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Mega Cap 300 Growth ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Large Cap Growth Index, which represents the growth companies of the MSCI US Large Cap 300 Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of large-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Institutional Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Institutional Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large-capitalization growth stocks in the United States.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 16%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that returns from large-capitalization growth stocks will trail returns from the overall stock market. Large-cap growth stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Large Cap Growth Index, which represents the growth companies of the MSCI US Large Cap 300 Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of large-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000019700ShareholderFeesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019700Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019700ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019700Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019700PerformanceTableDataInstitutional column primary compact * row dei_LegalEntityAxis compact vanguard_S000019700Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000019700PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000019700Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000019700OperatingExpensesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019700Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019700OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019700Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019700ExpenseExampleNoRedemptionInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019700Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019700ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019700Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.19 2012-12-27 (reflects no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.19 2012-12-27 (reflects no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in MegaCap 300 ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in MegaCap 300 ETF. This example assumes that MegaCap 300 ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large-capitalization stocks in the United States.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 19%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that returns from large-capitalization stocks will trail returns from the overall stock market. Large-cap stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Mega Cap 300 ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Mega Cap 300 ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Mega Cap 300 ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Mega Cap 300 ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Mega Cap 300 ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers'(which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Mega Cap 300 ETF Shares may also be halted if (1)the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Large Cap 300 Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of large-capitalization stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Institutional Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Institutional Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large-capitalization stocks in the United States.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 19%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that returns from large-capitalization stocks will trail returns from the overall stock market. Large-cap stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Large Cap 300 Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of large-capitalization stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000019698ShareholderFeesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019698Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019698ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019698Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019698PerformanceTableDataInstitutional column primary compact * row dei_LegalEntityAxis compact vanguard_S000019698Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000019698PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000019698Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000019698OperatingExpensesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019698Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019698OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019698Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019698ExpenseExampleNoRedemptionInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019698Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019698ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019698Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.17 2012-12-27 (reflects no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.17 2012-12-27 (reflects no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in MegaCap 300 Value ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in MegaCap 300 Value ETF. This example assumes that MegaCap 300 Value ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large-capitalization value stocks in the United States.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 17%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that returns from large-capitalization value stocks will trail returns from the overall stock market. Large-cap value stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Mega Cap 300 Value ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Mega Cap 300 Value ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Mega Cap 300 Value ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Mega Cap 300 Value ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Mega Cap 300 Value ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers'(which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Mega Cap 300 Value ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Large Cap Value Index, which represents the value companies of the MSCI US Large Cap 300 Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of large-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Institutional Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Institutional Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of large-capitalization value stocks in the United States.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 17%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund's target index may, at times, become focused in stocks of a particular sector, category, or group of companies, which could cause the Fund to underperform the overall stock market.</p><p>Investment style risk, which is the chance that returns from large-capitalization value stocks will trail returns from the overall stock market. Large-cap value stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Large Cap Value Index, which represents the value companies of the MSCI US Large Cap 300 Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of large-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>vanguard.com/performance </p><p>advisors.vanguard.com</p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000019699ShareholderFeesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019699Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019699ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019699Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019699PerformanceTableDataInstitutional column primary compact * row dei_LegalEntityAxis compact vanguard_S000019699Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000019699PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000019699Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000019699OperatingExpensesInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019699Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019699OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019699Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019699ExpenseExampleNoRedemptionInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019699Member ~ </div> <div style="display:none">~ http://vanguard/role/S000019699ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000019699Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.28 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.28 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Telecommunication Services ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Telecommunication Services ETF. This example assumes that Telecommunication Services ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of telecommunication services stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 28%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the telecommunication services sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the telecommunication services sector could be affected by, among other things, overall economic conditions, competition, and government regulation.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Telecommunication Services ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Telecommunication Services ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Telecommunication Services ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Telecommunication Services ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Telecommunication Services ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Telecommunication Services ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Telecommunication Services 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the telecommunication services sector, as classified under the Global Industry Classification Standard (GICS). The GICS telecommunication services sector is made up of companies that provide communication services primarily through fixed-line, cellular, wireless, high-bandwidth, and/or fiber-optic cable networks.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of telecommunication services stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 28%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the telecommunication services sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the telecommunication services sector could be affected by, among other things, overall economic conditions, competition, and government regulation.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Telecommunication Services 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the telecommunication services sector, as classified under the Global Industry Classification Standard (GICS). The GICS telecommunication services sector is made up of companies that provide communication services primarily through fixed-line, cellular, wireless, high-bandwidth, and/or fiber-optic cable networks.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004443ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004443Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004443ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004443Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004443PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004443Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004443PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004443Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004443OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004443Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004443OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004443Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004443ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004443Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004443ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004443Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.43 2012-12-27 (reflect no deduction for fees or expenses) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.43 2012-12-27 (reflect no deduction for fees or expenses) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.43 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Investor Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Investor Shares of the Fund.</p> <p>The Fund seeks to provide long-term capital appreciation.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 43%.</p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Investment style risk, which is the chance that returns from large-capitalization growth stocks will trail returns from the overall stock market. Large-cap growth stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>Asset concentration risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks. The Fund tends to invest a high percentage of assets in its ten largest holdings.</p><p>Manager risk, which is the chance that poor security selection or focus on securities in a particular sector, category, or group of companies will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund invests mainly in large-capitalization stocks of U.S. companies considered to have above-average earnings growth potential and reasonable stock prices in comparison with expected earnings. At least 80% of the Fund's assets will be invested in stocks of U.S. companies. The Fund uses multiple investment advisors.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Fund seeks to preserve the value of your investment at $1 per share, it is possible to lose money by investing in the Fund.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to provide long-term capital appreciation.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 43%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Investment style risk, which is the chance that returns from large-capitalization growth stocks will trail returns from the overall stock market. Large-cap growth stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>Asset concentration risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks. The Fund tends to invest a high percentage of assets in its ten largest holdings.</p><p>Manager risk, which is the chance that poor security selection or focus on securities in a particular sector, category, or group of companies will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund invests mainly in large-capitalization stocks of U.S. companies considered to have above-average earnings growth potential and reasonable stock prices in comparison with expected earnings. At least 80% of the Fund's assets will be invested in stocks of U.S. companies. The Fund uses multiple investment advisors.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance does not indicate how the Fund will perform in the future.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Examples</p> <p>The following examples are intended to help you compare the cost of investing in the Fund's Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. These examples assume that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Investor Shares or Admiral Shares of the Fund.</p> <p>The Fund seeks to provide long-term capital appreciation.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class. After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 43%.</p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Investment style risk, which is the chance that returns from large-capitalization growth stocks will trail returns from the overall stock market. Large-cap growth stocks tend to go through cycles of doing better-or worse-than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.</p><p>Asset concentration risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks. The Fund tends to invest a high percentage of assets in its ten largest holdings.</p><p>Manager risk, which is the chance that poor security selection or focus on securities in a particular sector, category, or group of companies will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund invests mainly in large-capitalization stocks of U.S. companies considered to have above-average earnings growth potential and reasonable stock prices in comparison with expected earnings. At least 80% of the Fund's assets will be invested in stocks of U.S. companies. The Fund uses multiple investment advisors.</p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. </p> <p> Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class. </p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004444ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004444ShareholderFeesParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004444ShareholderFeesParticipant2 column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004444PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004444PerformanceTableDataParticipant column primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004444PerformanceTableDataParticipant2 column primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004444OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004444OperatingExpensesParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004444OperatingExpensesParticipant2 column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004444ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004444ExpenseExampleNoRedemptionParticipant column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004444ExpenseExampleNoRedemptionParticipant2 column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004444Member ~ </div> Shareholder Fees (Fees paid directly from your investment) Shareholder Fees (Fees paid directly from your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment) Average Annual Total Returns for Periods Ended December 31, 2011 Average Annual Total Returns for Periods Ended December 31, 2011 Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.05 2012-12-27 (reflect no deduction for fees, expenses, or taxes) Annual Total Returns Fees and Expenses Investment Objective Primary Risks Risk/Return Primary Investment Strategies 0.05 2012-12-27 (reflect no deduction for fees, expenses, or taxes) <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund. </p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in Utilities ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Utilities ETF. This example assumes that Utilities ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of utilities stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 5%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the utilities sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the utilities sector could be affected by government regulation, overall economic conditions, and fuel prices.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>Because ETF Shares are traded on an exchange, they are subject to additional risks:</p><p>Utilities ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of a Utilities ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Utilities ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.</p><p>Although Utilities ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.</p><p>Trading of Utilities ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Utilities ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.</p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Utilities 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the utilities sector, as classified under the Global Industry Classification Standard (GICS). The GICS utilities sector is made up of electric, gas, and water utility companies, as well as companies that operate as independent producers and/or distributors of power. The sector includes both nuclear and nonnuclear facilities.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target Index and other comparative indexes, which have investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.</p> <p>Example</p> <p>The following example is intended to help you compare the cost of investing in the Fund's Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. This example assumes that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p> <p>The following table describes the fees and expenses you may pay if you buy and hold Admiral Shares of the Fund.</p> <p>The Fund seeks to track the performance of a benchmark index that measures the investment return of utilities stocks.</p> <p>Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <p>Portfolio Turnover</p> <p>The Fund pays transaction costs, such as commissions, when it buys and sells securities (or 'turns over' its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 5%. </p> <p>An investment in the Fund could lose money over short or even long periods. </p> <p>An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The Fund is subject to the following risks, which could affect the Fund's performance:</p><p>Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.</p><p>Sector risk, which is the chance that significant problems will affect a particular sector, or that returns from that sector will trail returns from the overall stock market. Daily fluctuations in specific market sectors are often more extreme than fluctuations in the overall market. Because the Fund invests all, or substantially all, of its assets in the utilities sector, the Fund's performance largely depends-for better or for worse-on the general condition of that sector. Companies in the utilities sector could be affected by government regulation, overall economic conditions, and fuel prices.</p><p>Nondiversification risk, which is the chance that the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds. Because the Fund tends to invest a relatively high percentage of its assets in its ten largest holdings and in its single largest holding, nondiversification risk is high for the Fund.</p><p>Investment style risk, which is the chance that returns from small- and mid-capitalization stocks (to the extent that the Fund's assets are invested in small- and mid-cap stocks) will trail returns from the overall stock market. Historically, small- and mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. </p><p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Index (IMI)/Utilities 25/50, an index made up of stocks of large, mid-size, and small U.S. companies within the utilities sector, as classified under the Global Industry Classification Standard (GICS). The GICS utilities sector is made up of electric, gas, and water utility companies, as well as companies that operate as independent producers and/or distributors of power. The sector includes both nuclear and nonnuclear facilities.</p><p>The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. </p> <p>An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</p> <p>The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of a small number of issuers as compared with other mutual funds.</p> <p>The following bar chart and table are intended to help you understand the risks of investing in the Fund.</p> <p>, which have investment characteristics similar to those of the Fund.</p> <p>800-662-7447</p> <p>vanguard.com/performance </p> <p>Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. </p> <p>When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.</p> <p>Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.</p> <p>Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</p> <div style="display:none">~ http://vanguard/role/S000004445ShareholderFeesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004445Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004445ShareholderFeesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004445Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004445PerformanceTableDataRetail column primary compact * row dei_LegalEntityAxis compact vanguard_S000004445Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004445PerformanceTableDataETF column primary compact * row dei_LegalEntityAxis compact vanguard_S000004445Member row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * ~ </div> <div style="display:none">~ http://vanguard/role/S000004445OperatingExpensesRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004445Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004445OperatingExpensesETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004445Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004445ExpenseExampleNoRedemptionRetail column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004445Member ~ </div> <div style="display:none">~ http://vanguard/role/S000004445ExpenseExampleNoRedemptionETF column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact vanguard_S000004445Member ~ </div> -0.0068 0.1153 0.3495 -0.3782 0.1015 0.0177 0.1115 0.0703 0.2610 -0.3580 1959-01-06 0.1534 -0.2169 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012210Member ~ </div> Annual Total Returns - Vanguard U.S. Growth Fund Investor Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 17.78%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 15.34% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -21.69% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012210Member ~ </div> Annual Total Returns - Vanguard U.S. Growth Fund Investor Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 17.78%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 15.34% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -21.69% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1778 1959-01-06 -0.0068 0.0048 0.0004 Comparative Indexes -0.0074 0.0038 -0.0004 -0.0036 0.0040 0.0002 0.0000 0.0000 20. 0 0 46. 144. 252. 567. 0.0043 0 0.0002 0.0045 -0.1368 0.1566 0.4163 -0.4494 0.1598 0.2592 0.1500 0.1895 0.3445 -0.1779 1981-09-30 0.2703 -0.2322 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012228Member ~ </div> Annual Total Returns - Vanguard International Growth Fund Investor Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 12.35%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 27.03% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -23.22% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012228Member ~ </div> Annual Total Returns - Vanguard International Growth Fund Investor Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 12.35%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 27.03% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -23.22% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1235 1981-09-30 -0.1368 -0.0202 0.0557 Comparative Indexes -0.1393 -0.0289 0.0473 -0.0853 -0.0181 0.0471 0.0000 0.0000 20. 0 0 50. 157. 274. 616. 0.0044 0 0.0005 0.0049 -0.0078 0.1443 0.3512 -0.4239 -0.0231 0.1309 0.0410 0.0827 0.3045 -0.2424 2000-05-31 0.2009 -0.2709 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012203Member ~ </div> Annual Total Returns - Vanguard FTSE Social Index Fund Investor Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 15.25%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 20.09% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -27.09% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012203Member ~ </div> Annual Total Returns - Vanguard FTSE Social Index Fund Investor Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 15.25%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 20.09% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -27.09% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1525 2000-05-31 -0.0078 -0.0290 0.0084 Comparative Indexes -0.0096 -0.0310 0.0062 -0.0027 -0.0246 0.0068 0.0000 0.0000 20. 0 0 30. 93. 163. 368. 0.0025 0 0.0004 0.0029 -0.0052 0.1458 0.3527 -0.4233 -0.0217 0.1335 0.0409 0.0851 2003-01-14 0.2009 -0.2703 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012204Member ~ </div> Annual Total Returns - Vanguard FTSE Social Index Fund Institutional Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 15.23%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 20.09% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -27.03% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1523 2003-01-14 -0.0052 -0.0275 0.0350 Comparative Indexes -0.0072 -0.0298 0.0327 -0.0008 -0.0234 0.0301 0.0000 0.0000 20. 0 0 16. 52. 90. 205. 0.0012 0 0.0004 0.0016 -0.0053 0.1174 0.3514 -0.3769 0.1039 0.0203 0.1138 0.0729 0.2631 -0.3567 2001-08-13 0.1546 -0.2162 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012211Member ~ </div> Annual Total Returns - Vanguard U.S. Growth Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 17.89%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 15.46% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -21.62% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1789 2001-08-13 -0.0053 0.0066 0.0023 Comparative Indexes 0.0000 0.0000 20. 0 0 32. 100. 174. 393. 0.0029 0 0.0002 0.0031 -0.1358 0.1581 0.4188 -0.4483 0.1625 0.2617 0.1521 0.1916 0.3466 -0.1763 2001-08-13 0.2711 -0.2316 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012229Member ~ </div> Annual Total Returns - Vanguard International Growth Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 12.50%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 27.11% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -23.16% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1250 2001-08-13 -0.1358 -0.0185 0.0575 Comparative Indexes 0.0000 0.0000 20. 0 0 37. 116. 202. 456. 0.0032 0 0.0004 0.0036 0.0234 0.1384 0.2546 2008-02-22 0.1555 -0.1336 2009-06-30 2011-09-30 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000055209Member ~ </div> Annual Total Returns - Vanguard Mega Cap 300 Index Fund Institutional Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 16.97%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 15.55% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -13.36% (quarter ended September 30, 2011 ).</p> (quarter ended June 30, 2009 ) (quarter ended September 30, 2011 ) 2012-09-30 0.1697 2008-02-22 0.0234 0.0030 0.0202 -0.0003 0.0194 0.0021 0.0000 0.0000 20. 0 0 8. 26. 45. 103. 0.0005 0 0.0003 0.0008 0.0307 0.1469 0.3510 2008-04-03 0.1527 -0.1260 2009-06-30 2010-06-30 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000055215Member ~ </div> Annual Total Returns - Vanguard Mega Cap 300 Growth Index Fund Institutional Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 19.32%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 15.27% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -12.60% (quarter ended June 30, 2010 ).</p> (quarter ended June 30, 2009 ) (quarter ended June 30, 2010 ) 2012-09-30 0.1932 2008-04-03 0.0307 0.0231 0.0285 0.0208 0.0227 0.0193 0.0000 0.0000 20. 0 0 9. 29. 51. 115. 0.0006 0 0.0003 0.0009 0.0149 0.1300 0.1647 2008-03-05 0.1608 -0.1697 2009-06-30 2009-03-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000055212Member ~ </div> Annual Total Returns - Vanguard Mega Cap 300 Value Index Fund Institutional Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 14.62%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 16.08% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -16.97% (quarter ended March 31, 2009 ).</p> (quarter ended June 30, 2009 ) (quarter ended March 31, 2009 ) 2012-09-30 0.1462 2008-03-05 0.0149 -0.0149 0.0106 -0.0193 0.0151 -0.0131 0.0000 0.0000 20. 0 0 8. 26. 45. 103. 0.0004 0 0.0004 0.0008 0.5581 0.1027 -0.3666 0.5540 2007-12-06 0.5206 -0.2001 2011-09-30 2009-03-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000051981Member ~ </div> Annual Total Returns - Vanguard Extended Duration Treasury Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 5.28%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 52.06% (quarter ended September 30, 2011 ), and the lowest return for a quarter was -20.01% (quarter ended March 31, 2009 ).</p> (quarter ended September 30, 2011 ) (quarter ended March 31, 2009 ) 2012-09-30 0.0528 2007-12-06 0.5581 0.1395 0.5300 0.1103 0.3630 0.1016 0.5617 0.1399 0 0 0 12. 39. 68. 154. 0.0009 0 0.0003 0.0012 0.0280 0.2109 0.2490 -0.3931 0.3487 0.1898 0.3905 2004-09-23 0.2197 -0.2762 2010-12-31 2008-09-30 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012219Member ~ </div> Annual Total Returns - Vanguard Energy Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 6.16%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 21.97% (quarter ended December 31, 2010 ), and the lowest return for a quarter was -27.62% (quarter ended September 30, 2008 ).</p> (quarter ended December 31, 2010 ) (quarter ended September 30, 2008 ) 2012-09-30 0.0616 2004-09-23 0.0280 0.0494 0.1179 Comparative Indexes 0.0255 0.0472 0.1158 0.0214 0.0423 0.1043 0.0275 0.0495 0.1180 0 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 -0.0945 0.2433 0.5163 -0.4655 0.2642 0.1950 0.0371 2004-01-26 0.2246 -0.3130 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012206Member ~ </div> Annual Total Returns - Vanguard Materials Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 13.39%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 22.46% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -31.30% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1339 2004-01-26 -0.0945 0.0290 0.0714 Comparative Indexes -0.0974 0.0257 0.0682 -0.0576 0.0245 0.0621 -0.0957 0.0288 0.0713 0 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 -0.0220 0.2709 0.2239 -0.4001 0.1352 0.1515 0.0531 2004-09-23 0.2147 -0.2422 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012225Member ~ </div> Annual Total Returns - Vanguard Industrials Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 11.28%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 21.47% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -24.22% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1128 2004-09-23 -0.0220 0.0071 0.0496 Comparative Indexes -0.0248 0.0045 0.0472 -0.0105 0.0057 0.0428 -0.0228 0.0070 0.0496 0 0 0 14. 45. 79. 179. 0.0009 0 0.0005 0.0014 0.0371 0.3057 0.4652 -0.3800 -0.1153 0.1652 -0.0422 2004-01-26 0.2104 -0.2541 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012215Member ~ </div> Annual Total Returns - Vanguard Consumer Discretionary Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 21.25%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 21.04% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -25.41% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.2125 2004-01-26 0.0371 0.0171 0.0381 Comparative Indexes 0.0349 0.0150 0.0364 0.0269 0.0141 0.0326 0.0370 0.0169 0.0381 0 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 0.1364 0.1444 0.1695 -0.1695 0.1292 0.1581 0.0395 2004-01-26 0.1150 -0.1315 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012217Member ~ </div> Annual Total Returns - Vanguard Consumer Staples Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 12.45%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 11.50% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -13.15% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1245 2004-01-26 0.1364 0.0736 0.0826 Comparative Indexes 0.1325 0.0700 0.0793 0.0938 0.0632 0.0720 0.1362 0.0738 0.0827 0 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 0.1057 0.0575 0.2201 -0.2350 0.0780 0.0662 0.0824 2004-01-26 0.1017 -0.1374 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012223Member ~ </div> Annual Total Returns - Vanguard Health Care Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 19.70%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 10.17% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -13.74% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1970 2004-01-26 0.1057 0.0331 0.0389 Comparative Indexes 0.1029 0.0303 0.0367 0.0724 0.0280 0.0334 0.1055 0.0331 0.0389 0 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 -0.1435 0.1474 0.1481 -0.4909 -0.1742 0.1925 0.0607 2004-01-26 0.2884 -0.3325 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012221Member ~ </div> Annual Total Returns - Vanguard Financials Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 20.32%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 28.84% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -33.25% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.2032 2004-01-26 -0.1435 -0.1386 -0.0525 Comparative Indexes -0.1470 -0.1424 -0.0564 -0.0908 -0.1118 -0.0429 -0.1435 -0.1389 -0.0525 0 0 0 19. 61. 107. 243. 0.0010 0 0.0004 0.0005 Acquired Fund Fees and Expenses are not included in the Fund's financial statements, which provide a clearer picture of a fund's actual operating costs. 0.0019 0.0052 0.1274 0.6174 -0.4283 0.1500 0.0895 0.0289 2004-01-26 0.2061 -0.2587 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012227Member ~ </div> Annual Total Returns - Vanguard Information Technology Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 19.66%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 20.61% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -25.87% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1966 2004-01-26 0.0052 0.0380 0.0301 Comparative Indexes 0.0040 0.0370 0.0291 0.0050 0.0325 0.0258 0.0053 0.0379 0.0301 0 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 -0.0225 0.1965 0.2965 -0.3885 0.0549 0.3665 0.0192 2004-09-23 0.1816 -0.1785 2010-09-30 2008-03-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012209Member ~ </div> Annual Total Returns - Vanguard Telecommunication Services Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 20.65%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 18.16% (quarter ended September 30, 2010 ), and the lowest return for a quarter was -17.85% (quarter ended March 31, 2008 ).</p> (quarter ended September 30, 2010 ) (quarter ended March 31, 2008 ) 2012-09-30 0.2065 2004-09-23 -0.0225 -0.0044 0.0596 Comparative Indexes -0.0271 -0.0087 0.0554 -0.0085 -0.0041 0.0515 -0.0236 -0.0047 0.0595 0 0 0 14. 45. 79. 179. 0.0009 0 0.0005 0.0014 0.1891 0.0695 0.1145 -0.2806 0.1715 0.2158 0.1475 2004-01-26 0.1186 -0.1744 2010-09-30 2008-09-30 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012213Member ~ </div> Annual Total Returns - Vanguard Utilities Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 4.46%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 11.86% (quarter ended September 30, 2010 ), and the lowest return for a quarter was -17.44% (quarter ended September 30, 2008 ).</p> (quarter ended September 30, 2010 ) (quarter ended September 30, 2008 ) 2012-09-30 0.0446 2004-01-26 0.1891 0.0362 0.0923 Comparative Indexes 0.1825 0.0307 0.0869 0.1306 0.0301 0.0804 0.1886 0.0361 0.0924 0 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 0.5579 0.1028 -0.3665 0.5552 2007-11-28 0.5205 -0.2001 2011-09-30 2009-03-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000051979Member ~ </div> Annual Total Returns - Vanguard Extended Duration Treasury Index Fund Institutional Shares <p>1 If applicable shareholder fees were reflected, returns would be less that those shown. The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 5.33%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 52.05% (quarter ended September 30, 2011 ), and the lowest return for a quarter was -20.01% (quarter ended March 31, 2009 ).</p> (quarter ended September 30, 2011 ) (quarter ended March 31, 2009 ) 2012-09-30 0.0533 2007-11-28 0.5540 0.1330 0.5264 0.1043 0.3607 0.0962 (other than on reinvested dividends or capital gains) 0.0050 0.0000 20. 0 0 60. 82. 106. 178. 0.0007 0 0.0003 0.0010 0.0050 0.0000 20. 0 0 58. 76. 95. 152. 0.0005 0 0.0003 0.0008 0.0232 0.1381 0.2543 -0.3608 2007-12-17 0.1554 -0.2146 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000055210Member ~ </div> Annual Total Returns - Vanguard Mega Cap 300 Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 16.95%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 15.54% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -21.46% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1695 2007-12-17 0.0232 -0.0131 0.0200 -0.0161 0.0192 -0.0114 0.0233 -0.0130 0 0 0 12. 39. 68. 154. 0.0008 0 0.0004 0.0012 0.0305 0.1467 0.3509 -0.3647 2007-12-17 0.1524 -0.2323 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000055216Member ~ </div> Annual Total Returns - Vanguard Mega Cap 300 Growth Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 19.32%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 15.24% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -23.23% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1932 2007-12-17 0.0305 0.0083 0.0283 0.0063 0.0225 0.0068 0.0304 0.0084 0 0 0 12. 39. 68. 154. 0.0008 0 0.0004 0.0012 0.0147 0.1298 0.1647 -0.3578 2007-12-17 0.1612 -0.1964 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000055213Member ~ </div> Annual Total Returns - Vanguard Mega Cap 300 Value Index Fund ETF Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 14.57%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 16.12% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -19.64% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1457 2007-12-17 0.0147 -0.0346 0.0105 -0.0387 0.0150 -0.0296 0.0145 -0.0346 0 0 0 12. 39. 68. 154. 0.0008 0 0.0004 0.0012 0.0279 0.2110 0.2485 -0.3934 0.3481 0.1896 0.3897 2004-10-07 0.2195 -0.2764 2010-12-31 2008-09-30 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012218Member ~ </div> Annual Total Returns - Vanguard Energy Index Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 6.18%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 21.95% (quarter ended December 31, 2010 ), and the lowest return for a quarter was -27.64% (quarter ended September 30, 2008 ).</p> (quarter ended December 31, 2010 ) (quarter ended September 30, 2008 ) 2012-09-30 0.0618 2004-10-07 0.0279 0.0491 0.1098 Comparative Indexes 0.0254 0.0470 0.1077 0.0214 0.0420 0.0968 0.0000 0.0000 20. 0 0 14. 45. 79. 179. 0.0012 0 0.0002 0.0014 -0.0947 0.2437 0.5159 -0.4657 0.2636 0.1946 0.0367 2004-02-11 0.2244 -0.3131 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012205Member ~ </div> Annual Total Returns - Vanguard Materials Index Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 13.40%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 22.44% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -31.31% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1340 2004-02-11 -0.0947 0.0287 0.0665 Comparative Indexes -0.0976 0.0255 0.0634 -0.0577 0.0243 0.0577 0.0000 0.0000 20. 0 0 14. 45. 79. 179. 0.0011 0 0.0003 0.0014 -0.0221 0.2712 0.2234 -0.4003 0.1346 2006-05-08 0.2145 -0.2424 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012224Member ~ </div> Annual Total Returns - Vanguard Industrials Index Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 11.29%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 21.45% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -24.24% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1129 2006-05-08 -0.0221 0.0068 0.0051 Comparative Indexes -0.0250 0.0043 0.0026 -0.0106 0.0056 0.0041 0.0000 0.0000 20. 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 0.0369 0.3060 0.4645 -0.3801 -0.1158 0.1647 2005-07-14 0.2106 -0.2539 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012214Member ~ </div> Annual Total Returns - Vanguard Consumer Discretionary Index Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 21.25%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 21.06% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -25.39% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.2125 2005-07-14 0.0369 0.0168 0.0315 Comparative Indexes 0.0348 0.0149 0.0297 0.0268 0.0139 0.0267 0.0000 0.0000 20. 0 0 14. 45. 79. 179. 0.0010 0 0.0004 0.0014 0.1365 0.1443 0.1695 -0.1700 0.1287 0.1577 0.0390 2004-01-30 0.1149 -0.1318 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012216Member ~ </div> Annual Total Returns - Vanguard Consumer Staples Index Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 12.45%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 11.49% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -13.18% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1245 2004-01-30 0.1365 0.0734 0.0831 Comparative Indexes 0.1326 0.0698 0.0798 0.0939 0.0630 0.0724 0.0000 0.0000 20. 0 0 14. 45. 79. 179. 0.0011 0 0.0003 0.0014 0.1057 0.0575 0.2199 -0.2353 0.0775 0.0658 0.0821 2004-02-05 0.1018 -0.1373 2009-09-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012222Member ~ </div> Annual Total Returns - Vanguard Health Care Index Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 19.71%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 10.18% (quarter ended September 30, 2009 ), and the lowest return for a quarter was -13.73% (quarter ended December 31, 2008 ).</p> (quarter ended September 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1971 2004-02-05 0.1057 0.0329 0.0386 Comparative Indexes 0.1028 0.0301 0.0365 0.0724 0.0279 0.0332 0.0000 0.0000 20. 0 0 14. 45. 79. 179. 0.0011 0 0.0003 0.0014 -0.1439 0.1479 0.1476 -0.4912 -0.1747 0.1921 0.0604 2004-02-04 0.2892 -0.3325 2009-06-30 2008-12-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012220Member ~ </div> Annual Total Returns - Vanguard Financials Index Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 20.41%</p> The year-to-date return 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Technology Index Fund Admiral Shares <p>1 The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 was 19.68%</p> The year-to-date return as of the most recent calendar quarter, which ended on September 30, 2012 <p>During the periods shown in the bar chart, the highest return for a calendar quarter was 20.60% (quarter ended June 30, 2009 ), and the lowest return for a quarter was -25.87% (quarter ended December 31, 2008 ).</p> (quarter ended June 30, 2009 ) (quarter ended December 31, 2008 ) 2012-09-30 0.1968 2004-03-25 0.0053 0.0378 0.0449 Comparative Indexes 0.0041 0.0368 0.0439 0.0050 0.0323 0.0388 0.0000 0.0000 20. 0 0 14. 45. 79. 179. 0.0012 0 0.0002 0.0014 -0.0223 0.1967 0.2960 -0.3888 0.0544 0.3665 2005-03-11 0.1820 -0.1788 2010-09-30 2008-03-31 <div style="display:none">~ http://xbrl.sec.gov/rr/role/BarChartData column rr_ProspectusShareClassAxis compact vanguard_C000012208Member ~ </div> Annual Total Returns - Vanguard Telecommunication 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