MMGPX vs. VIGIX

Last updated Jun 24, 2026

MMGPX (Morgan Stanley Discovery Portfolio) and VIGIX (Vanguard Growth Index Fund Institutional Shares) are both mutual funds - MMGPX is a Mid Cap Growth Equities fund managed by Morgan Stanley, while VIGIX is a Large Cap Growth Equities fund tracking the CRSP US Large Cap Growth Index. Over the past 5 years, MMGPX returned -7.25%/yr vs 13.39%/yr for VIGIX. A 0.74 correlation means they provide meaningful diversification when combined. Both charge a 0.04% expense ratio.

Performance

MMGPX vs. VIGIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Morgan Stanley Discovery Portfolio (MMGPX) and Vanguard Growth Index Fund Institutional Shares (VIGIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MMGPX achieves a -2.33% return, which is significantly lower than VIGIX's 5.75% return.

MMGPX

• 1D: -1.11%
• 1M: -4.55%
• YTD: -2.33%
• 6M: -5.94%
• 1Y: -6.55%
• 3Y*: 22.02%
• 5Y*: -7.25%
• 10Y*: —

VIGIX

• 1D: -1.35%
• 1M: -1.90%
• YTD: 5.75%
• 6M: 4.44%
• 1Y: 22.60%
• 3Y*: 23.62%
• 5Y*: 13.39%
• 10Y*: 18.28%

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

MMGPX vs. VIGIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MMGPX Morgan Stanley Discovery Portfolio	-2.33%	12.58%	41.83%	44.34%	-63.37%	-11.55%	152.67%	40.20%	10.89%	28.18%
VIGIX Vanguard Growth Index Fund Institutional Shares	5.75%	19.44%	32.68%	46.77%	-33.13%	27.27%	40.19%	37.26%	-3.34%	23.29%

Correlation

The correlation between MMGPX and VIGIX is 0.69, 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	0.69
Correlation (3Y) Calculated over the trailing 3-year period	0.69
Correlation (5Y) Calculated over the trailing 5-year period	0.75
Correlation (All Time) Calculated using the full available price history since Feb 1, 2017	0.74

The correlation between MMGPX and VIGIX has been stable across timeframes, ranging from 0.69 to 0.75 - a consistent structural relationship.

Return for Risk

MMGPX vs. VIGIX — Risk / Return Rank

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

MMGPX

MMGPX Risk / Return Rank: 2
MMGPX Sharpe Ratio Rank: 2
MMGPX Sortino Ratio Rank: 2
MMGPX Omega Ratio Rank: 2
MMGPX Calmar Ratio Rank: 2
MMGPX Martin Ratio Rank: 2

VIGIX

VIGIX Risk / Return Rank: 24
VIGIX Sharpe Ratio Rank: 28
VIGIX Sortino Ratio Rank: 26
VIGIX Omega Ratio Rank: 27
VIGIX Calmar Ratio Rank: 18
VIGIX Martin Ratio Rank: 22

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.

MMGPX vs. VIGIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Morgan Stanley Discovery Portfolio (MMGPX) and Vanguard Growth Index Fund Institutional Shares (VIGIX). 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.

	MMGPX	VIGIX	Difference
Sharpe ratio: Return per unit of total volatility	-0.19	1.43	-1.62
Sortino ratio: Return per unit of downside risk	-0.07	1.97	-2.04
Omega ratio: Gain probability vs. loss probability	0.99	1.25	-0.26
Calmar ratio: Return relative to maximum drawdown	-0.20	1.46	-1.66
Martin ratio: Return relative to average drawdown	-0.40	5.01	-5.41

MMGPX vs. VIGIX - Sharpe Ratio Comparison

The current MMGPX Sharpe Ratio is -0.19, which is lower than the VIGIX Sharpe Ratio of 1.43. The chart below compares the historical Sharpe Ratios of MMGPX and VIGIX, 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

MMGPX vs. VIGIX - Drawdown Comparison

The maximum MMGPX drawdown since its inception was -75.38%, which is greater than VIGIX's maximum drawdown of -56.95%. Use the drawdown chart below to compare losses from any high point for MMGPX and VIGIX.

Drawdown Indicators

	MMGPX	VIGIX	Difference
Max Drawdown Largest peak-to-trough decline	-75.38%	-56.95%	-18.43%
Max Drawdown (1Y) Largest decline over 1 year	-27.79%	-16.51%	-11.28%
Max Drawdown (3Y) Largest decline over 3 years	-29.27%	-23.03%	-6.24%
Max Drawdown (5Y) Largest decline over 5 years	-72.70%	-35.62%	-37.08%
Max Drawdown (10Y) Largest decline over 10 years	—	-35.62%	—
Current Drawdown Current decline from peak	-41.64%	-4.85%	-36.79%
Average Drawdown Average peak-to-trough decline	-30.29%	-16.25%	-14.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	13.62%	4.80%	+8.82%

Volatility

MMGPX vs. VIGIX - Volatility Comparison

Morgan Stanley Discovery Portfolio (MMGPX) has a higher volatility of 9.77% compared to Vanguard Growth Index Fund Institutional Shares (VIGIX) at 6.58%. This indicates that MMGPX's price experiences larger fluctuations and is considered to be riskier than VIGIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MMGPX	VIGIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.77%	6.58%	+3.19%
Volatility (6M) Calculated over the trailing 6-month period	21.75%	13.37%	+8.38%
Volatility (1Y) Calculated over the trailing 1-year period	28.61%	16.89%	+11.72%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	39.83%	22.49%	+17.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	35.22%	21.67%	+13.55%

MMGPX vs. VIGIX - Expense Ratio Comparison

Both MMGPX and VIGIX have an expense ratio of 0.04%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

MMGPX vs. VIGIX - Dividend Comparison

MMGPX's dividend yield for the trailing twelve months is around 0.44%, more than VIGIX's 0.39% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MMGPX Morgan Stanley Discovery Portfolio	0.44%	0.43%	0.00%	0.00%	125.40%	64.53%	7.93%	15.63%	28.02%	0.00%	0.00%	0.00%
VIGIX Vanguard Growth Index Fund Institutional Shares	0.39%	0.41%	0.47%	0.58%	0.70%	0.48%	0.66%	0.95%	1.32%	1.15%	1.40%	1.31%

Frequently Asked Questions

Can I hold both MMGPX and VIGIX in my portfolio?

MMGPX and VIGIX have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MMGPX or VIGIX?

MMGPX has higher volatility (9.77%) compared to VIGIX (6.58%). In terms of maximum drawdown, MMGPX dropped -75.38% vs VIGIX's -56.95%.

Which has better risk-adjusted returns?

VIGIX currently has the higher Sharpe Ratio (1.43 vs -0.19), 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.