Share Price Chart
Loading graphics...
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Performance
Performance Chart
The chart shows the growth of an initial investment of $10,000 in Vanguard Mega Cap Growth Index Fund Institutional Shares, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.
Loading graphics...
Returns By Period
Vanguard Mega Cap Growth Index Fund Institutional Shares (VMGAX) has returned -14.31% so far this year and 14.93% over the past 12 months. Looking at the last ten years, VMGAX has achieved an annualized return of 16.40%, outperforming the S&P 500 Index benchmark, which averaged 12.16% per year.
Vanguard Mega Cap Growth Index Fund Institutional Shares
- 1D
- -0.52%
- 1M
- -8.64%
- YTD
- -14.31%
- 6M
- -12.02%
- 1Y
- 14.93%
- 3Y*
- 20.56%
- 5Y*
- 11.89%
- 10Y*
- 16.40%
Benchmark (S&P 500 Index)
- 1D
- 2.91%
- 1M
- -5.09%
- YTD
- -4.63%
- 6M
- -2.39%
- 1Y
- 16.33%
- 3Y*
- 16.69%
- 5Y*
- 10.18%
- 10Y*
- 12.16%
Monthly Returns
Based on dividend-adjusted daily data since Dec 27, 2007, VMGAX's average daily return is +0.06%, while the average monthly return is +1.11%. At this rate, your investment would double in approximately 5.2 years.
Historically, 63% of months were positive and 37% were negative. The best month was Apr 2020 with a return of +15.0%, while the worst month was Oct 2008 at -17.0%. The longest winning streak lasted 7 consecutive months, and the longest losing streak was 5 months.
On a daily basis, VMGAX closed higher 55% of trading days. The best single day was Apr 9, 2025 with a return of +12.4%, while the worst single day was Mar 16, 2020 at -12.7%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -1.71% | -4.58% | -8.64% | -14.31% | |||||||||
| 2025 | 1.49% | -2.82% | -8.74% | 2.45% | 9.16% | 6.21% | 3.89% | 0.91% | 4.92% | 4.54% | -1.49% | -0.30% | 20.73% |
| 2024 | 2.57% | 6.95% | 0.88% | -4.56% | 6.89% | 7.45% | -2.18% | 2.52% | 2.35% | -0.58% | 6.20% | 1.16% | 32.98% |
| 2023 | 10.71% | -1.40% | 9.01% | 1.78% | 5.97% | 6.84% | 3.20% | -0.68% | -5.85% | -1.07% | 11.64% | 3.71% | 51.57% |
| 2022 | -8.59% | -5.26% | 4.14% | -12.99% | -2.58% | -8.61% | 13.43% | -5.26% | -10.59% | 3.84% | 4.58% | -8.83% | -33.55% |
| 2021 | -0.99% | 0.28% | 2.28% | 7.38% | -1.55% | 5.96% | 3.56% | 3.75% | -5.41% | 8.21% | 0.93% | 1.77% | 28.50% |
Benchmark Metrics
Vanguard Mega Cap Growth Index Fund Institutional Shares has an annualized alpha of 3.85%, beta of 1.03, and R² of 0.92 versus S&P 500 Index. Calculated based on daily prices since December 28, 2007.
- This fund captured 116.39% of S&P 500 Index gains but only 98.23% of its losses — a favorable profile for investors.
- This fund generated an annualized alpha of 3.85% versus S&P 500 Index — delivering returns beyond what market exposure alone would predict.
- With beta of 1.03 and R² of 0.92, this fund moves broadly in line with S&P 500 Index — much of its variation is explained by market exposure rather than independent behavior.
- Alpha
- 3.85%
- Beta
- 1.03
- R²
- 0.92
- Upside Capture
- 116.39%
- Downside Capture
- 98.23%
Expense Ratio
VMGAX has an expense ratio of 0.06%, which is considered low.
Return for Risk
Risk / Return Rank
VMGAX ranks 25 for risk / return — below 25% of mutual funds on our site. The returns aren't fully compensating for the risk involved. This isn't necessarily a dealbreaker, but factor it into your decision — especially if you're risk-averse.
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for Vanguard Mega Cap Growth Index Fund Institutional Shares (VMGAX) and compare them to a chosen benchmark (S&P 500 Index).
| VMGAX | Benchmark | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.65 | 0.90 | -0.24 |
Sortino ratioReturn per unit of downside risk | 1.11 | 1.39 | -0.28 |
Omega ratioGain probability vs. loss probability | 1.15 | 1.21 | -0.06 |
Calmar ratioReturn relative to maximum drawdown | 0.71 | 1.40 | -0.69 |
Martin ratioReturn relative to average drawdown | 2.55 | 6.61 | -4.05 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Explore VMGAX risk-adjusted metrics in detail
Dive deeper into individual metrics with historical trends, benchmark comparisons, and performance across different time periods.
Dividends
Dividend History
Vanguard Mega Cap Growth Index Fund Institutional Shares provided a 0.42% dividend yield over the last twelve months, with an annual payout of $2.91 per share.
| Period | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dividend | $2.91 | $2.96 | $3.00 | $2.62 | $2.41 | $2.17 | $2.65 | $2.49 | $2.39 | $2.73 | $2.65 | $2.38 |
Dividend yield | 0.42% | 0.36% | 0.44% | 0.51% | 0.71% | 0.42% | 0.65% | 0.86% | 1.13% | 1.23% | 1.53% | 1.44% |
Monthly Dividends
The table displays the monthly dividend distributions for Vanguard Mega Cap Growth Index Fund Institutional Shares. The dividends shown in the table have been adjusted to account for any splits that may have occurred.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | $0.00 | $0.00 | $0.65 | $0.65 | |||||||||
| 2025 | $0.00 | $0.00 | $0.70 | $0.00 | $0.00 | $0.78 | $0.00 | $0.00 | $0.69 | $0.00 | $0.00 | $0.80 | $2.96 |
| 2024 | $0.00 | $0.00 | $0.61 | $0.00 | $0.00 | $0.63 | $0.00 | $0.00 | $0.76 | $0.00 | $0.00 | $1.00 | $3.00 |
| 2023 | $0.00 | $0.00 | $0.57 | $0.00 | $0.00 | $0.55 | $0.00 | $0.00 | $0.64 | $0.00 | $0.00 | $0.86 | $2.62 |
| 2022 | $0.00 | $0.00 | $0.48 | $0.00 | $0.00 | $0.55 | $0.00 | $0.00 | $0.70 | $0.00 | $0.00 | $0.68 | $2.41 |
| 2021 | $0.00 | $0.00 | $0.53 | $0.00 | $0.00 | $0.53 | $0.00 | $0.00 | $0.56 | $0.00 | $0.00 | $0.56 | $2.17 |
Drawdowns
Drawdowns Chart
The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.
Loading graphics...
Worst Drawdowns
The table below displays the maximum drawdowns of the Vanguard Mega Cap Growth Index Fund Institutional Shares. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.
The maximum drawdown for the Vanguard Mega Cap Growth Index Fund Institutional Shares was 47.97%, occurring on Mar 9, 2009. Recovery took 469 trading sessions.
The current Vanguard Mega Cap Growth Index Fund Institutional Shares drawdown is 16.78%.
Depth | Start | To Bottom | Bottom | To Recover | End | Total |
|---|---|---|---|---|---|---|
| -47.97% | Dec 31, 2007 | 299 | Mar 9, 2009 | 469 | Jan 14, 2011 | 768 |
| -36.03% | Dec 28, 2021 | 216 | Nov 3, 2022 | 298 | Jan 12, 2024 | 514 |
| -30.95% | Feb 20, 2020 | 23 | Mar 23, 2020 | 53 | Jun 8, 2020 | 76 |
| -23.45% | Feb 20, 2025 | 34 | Apr 8, 2025 | 52 | Jun 24, 2025 | 86 |
| -22.56% | Oct 2, 2018 | 58 | Dec 24, 2018 | 80 | Apr 22, 2019 | 138 |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
Loading graphics...