VIGAX vs. FMDGX

Last updated Jun 13, 2026

VIGAX (Vanguard Growth Index Fund Admiral Shares) and FMDGX (Fidelity Mid Cap Growth Index Fund) are both mutual funds - VIGAX is a Large Cap Growth Equities fund tracking the CRSP US Large Cap Growth Index, while FMDGX is a Mid Cap Growth Equities fund managed by Fidelity. Over the past 5 years, VIGAX returned 13.73%/yr vs 5.97%/yr for FMDGX. Their correlation of 0.87 suggests significant overlap in exposure. Both charge a 0.05% expense ratio.

Performance

VIGAX vs. FMDGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Growth Index Fund Admiral Shares (VIGAX) and Fidelity Mid Cap Growth Index Fund (FMDGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VIGAX achieves a 4.85% return, which is significantly higher than FMDGX's 2.88% return.

VIGAX

• 1D: 1.82%
• 1M: -2.66%
• YTD: 4.85%
• 6M: 5.52%
• 1Y: 21.03%
• 3Y*: 23.61%
• 5Y*: 13.73%
• 10Y*: 17.87%

FMDGX

• 1D: 2.79%
• 1M: 3.17%
• YTD: 2.88%
• 6M: 1.30%
• 1Y: 4.63%
• 3Y*: 15.12%
• 5Y*: 5.97%
• 10Y*: —

*Multi-year figures are annualized to reflect compound growth (CAGR)

VIGAX vs. FMDGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
VIGAX Vanguard Growth Index Fund Admiral Shares	4.85%	19.43%	32.67%	46.76%	-33.14%	27.26%	40.18%	8.79%
FMDGX Fidelity Mid Cap Growth Index Fund	2.88%	8.60%	22.03%	25.79%	-26.67%	12.67%	34.84%	4.63%

Correlation

The correlation between VIGAX and FMDGX is 0.73, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.77
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (All Time) Calculated using the full available price history since Jul 17, 2019	0.87

The correlation between VIGAX and FMDGX shifts across timeframes, from 0.73 (1 year) to 0.87 (all time), reflecting how their relationship changes across market environments.

Return for Risk

VIGAX vs. FMDGX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

VIGAX

VIGAX Risk / Return Rank: 27
VIGAX Sharpe Ratio Rank: 32
VIGAX Sortino Ratio Rank: 29
VIGAX Omega Ratio Rank: 31
VIGAX Calmar Ratio Rank: 21
VIGAX Martin Ratio Rank: 22

FMDGX

FMDGX Risk / Return Rank: 6
FMDGX Sharpe Ratio Rank: 6
FMDGX Sortino Ratio Rank: 6
FMDGX Omega Ratio Rank: 6
FMDGX Calmar Ratio Rank: 6
FMDGX Martin Ratio Rank: 6

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

VIGAX vs. FMDGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Growth Index Fund Admiral Shares (VIGAX) and Fidelity Mid Cap Growth Index Fund (FMDGX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	VIGAX	FMDGX	Difference
Sharpe ratio: Return per unit of total volatility	1.29	0.27	+1.02
Sortino ratio: Return per unit of downside risk	1.78	0.50	+1.29
Omega ratio: Gain probability vs. loss probability	1.23	1.06	+0.17
Calmar ratio: Return relative to maximum drawdown	1.29	0.31	+0.99
Martin ratio: Return relative to average drawdown	4.48	0.89	+3.59

VIGAX vs. FMDGX - Sharpe Ratio Comparison

The current VIGAX Sharpe Ratio is 1.29, which is higher than the FMDGX Sharpe Ratio of 0.27. The chart below compares the historical Sharpe Ratios of VIGAX and FMDGX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

VIGAX vs. FMDGX - Drawdown Comparison

The maximum VIGAX drawdown since its inception was -50.66%, which is greater than FMDGX's maximum drawdown of -38.59%. Use the drawdown chart below to compare losses from any high point for VIGAX and FMDGX.

Drawdown Indicators

	VIGAX	FMDGX	Difference
Max Drawdown Largest peak-to-trough decline	-50.66%	-38.59%	-12.07%
Max Drawdown (1Y) Largest decline over 1 year	-16.51%	-14.75%	-1.76%
Max Drawdown (3Y) Largest decline over 3 years	-23.04%	-25.30%	+2.26%
Max Drawdown (5Y) Largest decline over 5 years	-35.63%	-38.59%	+2.96%
Max Drawdown (10Y) Largest decline over 10 years	-35.63%	—	—
Current Drawdown Current decline from peak	-5.66%	-2.97%	-2.69%
Average Drawdown Average peak-to-trough decline	-11.95%	-11.17%	-0.78%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.75%	5.08%	-0.33%

Volatility

VIGAX vs. FMDGX - Volatility Comparison

Vanguard Growth Index Fund Admiral Shares (VIGAX) and Fidelity Mid Cap Growth Index Fund (FMDGX) have volatilities of 5.91% and 5.75%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VIGAX	FMDGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.91%	5.75%	+0.16%
Volatility (6M) Calculated over the trailing 6-month period	13.06%	13.44%	-0.38%
Volatility (1Y) Calculated over the trailing 1-year period	16.55%	17.02%	-0.47%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.44%	22.44%	0.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.63%	24.33%	-2.70%

VIGAX vs. FMDGX - Expense Ratio Comparison

Both VIGAX and FMDGX have an expense ratio of 0.05%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

VIGAX vs. FMDGX - Dividend Comparison

VIGAX's dividend yield for the trailing twelve months is around 0.38%, less than FMDGX's 1.80% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FMDGX Fidelity Mid Cap Growth Index Fund	1.80%	1.85%	0.47%	0.63%	0.81%	6.43%	0.36%	0.29%	0.00%	0.00%	0.00%	0.00%
VIGAX Vanguard Growth Index Fund Admiral Shares	0.38%	0.40%	0.46%	0.57%	0.69%	0.47%	0.66%	0.94%	1.31%	1.14%	1.39%	1.31%

Frequently Asked Questions

Can I hold both VIGAX and FMDGX in my portfolio?

VIGAX and FMDGX have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VIGAX or FMDGX?

VIGAX has higher volatility (5.91%) compared to FMDGX (5.75%). In terms of maximum drawdown, VIGAX dropped -50.66% vs FMDGX's -38.59%.

Which has better risk-adjusted returns?

VIGAX currently has the higher Sharpe Ratio (1.29 vs 0.27), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.