VTISX vs. GIOTX

Last updated Jul 15, 2026

VTISX (Vanguard Total International Stock Index Fund Institutional Select Shares) and GIOTX (GMO International Developed Equity Allocation Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, VTISX returned 8.34%/yr vs 14.25%/yr for GIOTX. Their correlation of 0.94 suggests significant overlap in exposure. VTISX charges 0.04%/yr vs 0.00%/yr for GIOTX.

Performance

VTISX vs. GIOTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Total International Stock Index Fund Institutional Select Shares (VTISX) and GMO International Developed Equity Allocation Fund (GIOTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VTISX achieves a 11.55% return, which is significantly lower than GIOTX's 17.22% return.

VTISX

• 1D: -1.70%
• 1M: -1.85%
• 6M: 7.70%
• YTD: 11.55%
• 1Y: 24.80%
• 3Y*: 16.92%
• 5Y*: 8.34%
• 10Y*: —

GIOTX

• 1D: -0.83%
• 1M: -0.97%
• 6M: 13.93%
• YTD: 17.22%
• 1Y: 37.52%
• 3Y*: 25.39%
• 5Y*: 14.25%
• 10Y*: 11.91%

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

VTISX vs. GIOTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VTISX Vanguard Total International Stock Index Fund Institutional Select Shares	11.55%	32.26%	5.42%	15.32%	-15.96%	8.67%	11.32%	21.60%	-14.38%	26.75%
GIOTX GMO International Developed Equity Allocation Fund	17.22%	43.70%	10.66%	21.03%	-12.41%	11.14%	7.43%	24.45%	-19.66%	26.38%

Correlation

The correlation between VTISX and GIOTX is 0.91, 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	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017	0.94

The correlation between VTISX and GIOTX has been stable across timeframes, ranging from 0.91 to 0.94 - a consistent structural relationship.

Return for Risk

VTISX vs. GIOTX — Risk / Return Rank

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

VTISX

VTISX Risk / Return Rank: 52
VTISX Sharpe Ratio Rank: 52
VTISX Sortino Ratio Rank: 47
VTISX Omega Ratio Rank: 54
VTISX Calmar Ratio Rank: 53
VTISX Martin Ratio Rank: 53

GIOTX

GIOTX Risk / Return Rank: 87
GIOTX Sharpe Ratio Rank: 88
GIOTX Sortino Ratio Rank: 85
GIOTX Omega Ratio Rank: 83
GIOTX Calmar Ratio Rank: 89
GIOTX Martin Ratio Rank: 90

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.

VTISX vs. GIOTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total International Stock Index Fund Institutional Select Shares (VTISX) and GMO International Developed Equity Allocation Fund (GIOTX). 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.

	VTISX	GIOTX	Difference
Sharpe ratio: Return per unit of total volatility	1.60	2.35	-0.76
Sortino ratio: Return per unit of downside risk	2.19	3.23	-1.05
Omega ratio: Gain probability vs. loss probability	1.30	1.43	-0.13
Calmar ratio: Return relative to maximum drawdown	2.21	3.54	-1.33
Martin ratio: Return relative to average drawdown	8.43	13.69	-5.27

VTISX vs. GIOTX - Sharpe Ratio Comparison

The current VTISX Sharpe Ratio is 1.60, which is lower than the GIOTX Sharpe Ratio of 2.35. The chart below compares the historical Sharpe Ratios of VTISX and GIOTX, 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

VTISX vs. GIOTX - Drawdown Comparison

The maximum VTISX drawdown since its inception was -35.74%, smaller than the maximum GIOTX drawdown of -56.51%. Use the drawdown chart below to compare losses from any high point for VTISX and GIOTX.

Drawdown Indicators

	VTISX	GIOTX	Difference
Max Drawdown Largest peak-to-trough decline	-35.74%	-56.51%	+20.77%
Max Drawdown (1Y) Largest decline over 1 year	-11.29%	-10.66%	-0.63%
Max Drawdown (3Y) Largest decline over 3 years	-13.14%	-13.40%	+0.26%
Max Drawdown (5Y) Largest decline over 5 years	-29.47%	-28.34%	-1.13%
Max Drawdown (10Y) Largest decline over 10 years	—	-39.29%	—
Current Drawdown Current decline from peak	-3.70%	-1.98%	-1.72%
Average Drawdown Average peak-to-trough decline	-7.32%	-14.17%	+6.85%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.96%	2.75%	+0.21%

Volatility

VTISX vs. GIOTX - Volatility Comparison

Vanguard Total International Stock Index Fund Institutional Select Shares (VTISX) has a higher volatility of 6.26% compared to GMO International Developed Equity Allocation Fund (GIOTX) at 5.44%. This indicates that VTISX's price experiences larger fluctuations and is considered to be riskier than GIOTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VTISX	GIOTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.26%	5.44%	+0.82%
Volatility (6M) Calculated over the trailing 6-month period	13.77%	13.23%	+0.54%
Volatility (1Y) Calculated over the trailing 1-year period	15.67%	16.08%	-0.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.31%	15.52%	-0.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.00%	16.14%	-0.14%

VTISX vs. GIOTX - Expense Ratio Comparison

VTISX has a 0.04% expense ratio, which is higher than GIOTX's 0.00% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

VTISX vs. GIOTX - Dividend Comparison

VTISX's dividend yield for the trailing twelve months is around 2.62%, less than GIOTX's 8.69% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GIOTX GMO International Developed Equity Allocation Fund	8.69%	8.04%	5.07%	6.54%	4.45%	6.67%	4.48%	3.74%	3.90%	3.15%	4.04%	3.39%
VTISX Vanguard Total International Stock Index Fund Institutional Select Shares	2.62%	3.19%	3.39%	3.28%	3.11%	3.12%	2.16%	3.07%	3.23%	2.80%	0.00%	0.00%

Frequently Asked Questions

Can I hold both VTISX and GIOTX in my portfolio?

With a correlation of 0.91, VTISX and GIOTX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, VTISX or GIOTX?

VTISX has higher volatility (6.26%) compared to GIOTX (5.44%). In terms of maximum drawdown, VTISX dropped -35.74% vs GIOTX's -56.51%.

Which has better risk-adjusted returns?

GIOTX currently has the higher Sharpe Ratio (2.35 vs 1.60), 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.