Vanguard Mid-Cap Growth Fund Summary Prospectus …

Vanguard Mid-Cap Growth Fund Investor Shares Return Before Taxes 32.07% 9.42% 12.87% Return After Taxes on Distributions 29.06 7.63 11.11 Return After Taxes on Distributions and Sale of Fund Shares 21.08 7.14 10.29 Russell Midcap Growth Index (reflects no deduction for fees, expenses, or taxes) 35.47% 11.60% 14.24% ................
................