MIOIX vs. VTIAX

Last updated Jun 26, 2026

MIOIX (Morgan Stanley Institutional Fund, Inc. International Opportunity Portfolio) and VTIAX (Vanguard Total International Stock Index Fund Admiral Shares) are both Foreign Large Cap Equities funds. Over the past 10 years, MIOIX returned 10.52%/yr vs 10.13%/yr for VTIAX. Their correlation of 0.82 suggests significant overlap in exposure. MIOIX charges 1.00%/yr vs 0.09%/yr for VTIAX.

Performance

MIOIX vs. VTIAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Morgan Stanley Institutional Fund, Inc. International Opportunity Portfolio (MIOIX) and Vanguard Total International Stock Index Fund Admiral Shares (VTIAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MIOIX achieves a 5.56% return, which is significantly lower than VTIAX's 12.32% return. Both investments have delivered pretty close results over the past 10 years, with MIOIX having a 10.52% annualized return and VTIAX not far behind at 10.13%.

MIOIX

• 1D: 1.46%
• 1M: 0.77%
• YTD: 5.56%
• 6M: 4.91%
• 1Y: 3.00%
• 3Y*: 13.27%
• 5Y*: -2.94%
• 10Y*: 10.52%

VTIAX

• 1D: -0.02%
• 1M: -1.54%
• YTD: 12.32%
• 6M: 12.18%
• 1Y: 27.68%
• 3Y*: 18.80%
• 5Y*: 8.19%
• 10Y*: 10.13%

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

MIOIX vs. VTIAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MIOIX Morgan Stanley Institutional Fund, Inc. International Opportunity Portfolio	5.56%	12.64%	19.32%	21.11%	-43.76%	-5.25%	55.49%	35.20%	-12.03%	53.41%
VTIAX Vanguard Total International Stock Index Fund Admiral Shares	12.32%	32.18%	5.34%	15.28%	-16.02%	8.59%	11.27%	21.52%	-14.46%	27.54%

Correlation

The correlation between MIOIX and VTIAX is 0.85, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.85
Correlation (3Y) Calculated over the trailing 3-year period	0.85
Correlation (5Y) Calculated over the trailing 5-year period	0.84
Correlation (10Y) Calculated over the trailing 10-year period	0.83
Correlation (All Time) Calculated using the full available price history since Nov 29, 2010	0.82

The correlation between MIOIX and VTIAX has been stable across timeframes, ranging from 0.82 to 0.85 - a consistent structural relationship.

Return for Risk

MIOIX vs. VTIAX — Risk / Return Rank

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

MIOIX

MIOIX Risk / Return Rank: 4
MIOIX Sharpe Ratio Rank: 4
MIOIX Sortino Ratio Rank: 4
MIOIX Omega Ratio Rank: 5
MIOIX Calmar Ratio Rank: 4
MIOIX Martin Ratio Rank: 4

VTIAX

VTIAX Risk / Return Rank: 52
VTIAX Sharpe Ratio Rank: 53
VTIAX Sortino Ratio Rank: 48
VTIAX Omega Ratio Rank: 55
VTIAX Calmar Ratio Rank: 52
VTIAX Martin Ratio Rank: 53

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.

MIOIX vs. VTIAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Morgan Stanley Institutional Fund, Inc. International Opportunity Portfolio (MIOIX) and Vanguard Total International Stock Index Fund Admiral Shares (VTIAX). 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.

	MIOIX	VTIAX	Difference
Sharpe ratio: Return per unit of total volatility	0.12	1.80	-1.68
Sortino ratio: Return per unit of downside risk	0.32	2.44	-2.12
Omega ratio: Gain probability vs. loss probability	1.04	1.34	-0.30
Calmar ratio: Return relative to maximum drawdown	0.14	2.44	-2.30
Martin ratio: Return relative to average drawdown	0.44	9.44	-9.00

MIOIX vs. VTIAX - Sharpe Ratio Comparison

The current MIOIX Sharpe Ratio is 0.12, which is lower than the VTIAX Sharpe Ratio of 1.80. The chart below compares the historical Sharpe Ratios of MIOIX and VTIAX, 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

MIOIX vs. VTIAX - Drawdown Comparison

The maximum MIOIX drawdown since its inception was -60.88%, which is greater than VTIAX's maximum drawdown of -35.83%. Use the drawdown chart below to compare losses from any high point for MIOIX and VTIAX.

Drawdown Indicators

	MIOIX	VTIAX	Difference
Max Drawdown Largest peak-to-trough decline	-60.88%	-35.83%	-25.05%
Max Drawdown (1Y) Largest decline over 1 year	-18.50%	-11.28%	-7.22%
Max Drawdown (3Y) Largest decline over 3 years	-19.42%	-13.13%	-6.29%
Max Drawdown (5Y) Largest decline over 5 years	-56.75%	-29.52%	-27.23%
Max Drawdown (10Y) Largest decline over 10 years	-60.88%	-35.83%	-25.05%
Current Drawdown Current decline from peak	-22.47%	-3.02%	-19.45%
Average Drawdown Average peak-to-trough decline	-15.83%	-8.05%	-7.78%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.00%	2.91%	+3.09%

Volatility

MIOIX vs. VTIAX - Volatility Comparison

Morgan Stanley Institutional Fund, Inc. International Opportunity Portfolio (MIOIX) has a higher volatility of 11.48% compared to Vanguard Total International Stock Index Fund Admiral Shares (VTIAX) at 6.80%. This indicates that MIOIX's price experiences larger fluctuations and is considered to be riskier than VTIAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MIOIX	VTIAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.48%	6.80%	+4.68%
Volatility (6M) Calculated over the trailing 6-month period	19.57%	13.39%	+6.18%
Volatility (1Y) Calculated over the trailing 1-year period	22.09%	15.38%	+6.71%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	25.47%	15.27%	+10.20%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.27%	15.82%	+6.45%

MIOIX vs. VTIAX - Expense Ratio Comparison

MIOIX has a 1.00% expense ratio, which is higher than VTIAX's 0.09% expense ratio.

Dividends

MIOIX vs. VTIAX - Dividend Comparison

MIOIX has not paid dividends to shareholders, while VTIAX's dividend yield for the trailing twelve months is around 2.56%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MIOIX Morgan Stanley Institutional Fund, Inc. International Opportunity Portfolio	0.00%	0.00%	0.16%	0.00%	9.25%	2.13%	0.24%	0.00%	0.24%	1.63%	0.02%	3.15%
VTIAX Vanguard Total International Stock Index Fund Admiral Shares	2.56%	3.15%	3.33%	3.22%	3.04%	3.05%	2.10%	3.04%	3.16%	2.73%	2.93%	2.84%

Frequently Asked Questions

Can I hold both MIOIX and VTIAX in my portfolio?

MIOIX and VTIAX have a correlation of 0.85, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MIOIX or VTIAX?

MIOIX has higher volatility (11.48%) compared to VTIAX (6.80%). In terms of maximum drawdown, MIOIX dropped -60.88% vs VTIAX's -35.83%.

Which has better risk-adjusted returns?

VTIAX currently has the higher Sharpe Ratio (1.80 vs 0.12), 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.