GTMIX vs. SWISX

Last updated Jun 23, 2026

GTMIX (GMO Tax-Managed International Equities Fund) and SWISX (Schwab International Index Fund) are both Foreign Large Cap Equities funds. Over the past 10 years, GTMIX returned 10.27%/yr vs 9.58%/yr for SWISX. Their correlation of 0.94 suggests significant overlap in exposure. GTMIX charges 0.68%/yr vs 0.06%/yr for SWISX.

Performance

GTMIX vs. SWISX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in GMO Tax-Managed International Equities Fund (GTMIX) and Schwab International Index Fund (SWISX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, GTMIX achieves a 13.42% return, which is significantly higher than SWISX's 10.58% return. Over the past 10 years, GTMIX has outperformed SWISX with an annualized return of 10.27%, while SWISX has yielded a comparatively lower 9.58% annualized return.

GTMIX

• 1D: -0.38%
• 1M: -0.54%
• YTD: 13.42%
• 6M: 13.84%
• 1Y: 39.10%
• 3Y*: 20.69%
• 5Y*: 11.56%
• 10Y*: 10.27%

SWISX

• 1D: 0.83%
• 1M: 1.99%
• YTD: 10.58%
• 6M: 10.97%
• 1Y: 25.29%
• 3Y*: 16.19%
• 5Y*: 9.33%
• 10Y*: 9.58%

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

GTMIX vs. SWISX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
GTMIX GMO Tax-Managed International Equities Fund	13.42%	46.17%	1.54%	14.96%	-10.13%	10.71%	7.50%	23.35%	-21.23%	28.45%
SWISX Schwab International Index Fund	10.58%	31.59%	3.54%	18.13%	-14.30%	11.25%	8.14%	21.87%	-13.38%	25.32%

Correlation

The correlation between GTMIX and SWISX 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	0.90
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Jan 4, 1999	0.94

The correlation between GTMIX and SWISX has been stable across timeframes, ranging from 0.90 to 0.94 - a consistent structural relationship.

Return for Risk

GTMIX vs. SWISX — Risk / Return Rank

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

GTMIX

GTMIX Risk / Return Rank: 91
GTMIX Sharpe Ratio Rank: 93
GTMIX Sortino Ratio Rank: 90
GTMIX Omega Ratio Rank: 84
GTMIX Calmar Ratio Rank: 93
GTMIX Martin Ratio Rank: 94

SWISX

SWISX Risk / Return Rank: 35
SWISX Sharpe Ratio Rank: 34
SWISX Sortino Ratio Rank: 33
SWISX Omega Ratio Rank: 33
SWISX Calmar Ratio Rank: 36
SWISX Martin Ratio Rank: 39

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.

GTMIX vs. SWISX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for GMO Tax-Managed International Equities Fund (GTMIX) and Schwab International Index Fund (SWISX). 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.

	GTMIX	SWISX	Difference
Sharpe ratio: Return per unit of total volatility	2.94	1.56	+1.38
Sortino ratio: Return per unit of downside risk	4.05	2.23	+1.82
Omega ratio: Gain probability vs. loss probability	1.53	1.28	+0.25
Calmar ratio: Return relative to maximum drawdown	4.85	2.14	+2.70
Martin ratio: Return relative to average drawdown	18.73	8.03	+10.71

GTMIX vs. SWISX - Sharpe Ratio Comparison

The current GTMIX Sharpe Ratio is 2.94, which is higher than the SWISX Sharpe Ratio of 1.56. The chart below compares the historical Sharpe Ratios of GTMIX and SWISX, 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

GTMIX vs. SWISX - Drawdown Comparison

The maximum GTMIX drawdown since its inception was -58.31%, roughly equal to the maximum SWISX drawdown of -60.65%. Use the drawdown chart below to compare losses from any high point for GTMIX and SWISX.

Drawdown Indicators

	GTMIX	SWISX	Difference
Max Drawdown Largest peak-to-trough decline	-58.31%	-60.65%	+2.34%
Max Drawdown (1Y) Largest decline over 1 year	-7.90%	-11.39%	+3.49%
Max Drawdown (3Y) Largest decline over 3 years	-14.11%	-13.68%	-0.43%
Max Drawdown (5Y) Largest decline over 5 years	-27.34%	-29.42%	+2.08%
Max Drawdown (10Y) Largest decline over 10 years	-40.32%	-33.83%	-6.49%
Current Drawdown Current decline from peak	-1.33%	0.00%	-1.33%
Average Drawdown Average peak-to-trough decline	-12.66%	-14.79%	+2.13%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.04%	3.04%	-1.00%

Volatility

GTMIX vs. SWISX - Volatility Comparison

The current volatility for GMO Tax-Managed International Equities Fund (GTMIX) is 3.61%, while Schwab International Index Fund (SWISX) has a volatility of 5.02%. This indicates that GTMIX experiences smaller price fluctuations and is considered to be less risky than SWISX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	GTMIX	SWISX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.61%	5.02%	-1.41%
Volatility (6M) Calculated over the trailing 6-month period	9.95%	13.02%	-3.07%
Volatility (1Y) Calculated over the trailing 1-year period	13.00%	15.62%	-2.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.94%	16.37%	-1.43%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.03%	16.88%	-0.85%

GTMIX vs. SWISX - Expense Ratio Comparison

GTMIX has a 0.68% expense ratio, which is higher than SWISX's 0.06% expense ratio.

Dividends

GTMIX vs. SWISX - Dividend Comparison

GTMIX's dividend yield for the trailing twelve months is around 19.78%, more than SWISX's 3.21% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GTMIX GMO Tax-Managed International Equities Fund	19.78%	22.43%	5.94%	0.36%	5.44%	16.55%	2.25%	4.13%	7.25%	2.96%	4.05%	3.26%
SWISX Schwab International Index Fund	3.21%	3.55%	3.29%	3.31%	2.73%	3.34%	1.88%	3.09%	3.15%	2.71%	3.19%	2.71%

Frequently Asked Questions

Can I hold both GTMIX and SWISX in my portfolio?

With a correlation of 0.91, GTMIX and SWISX 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, GTMIX or SWISX?

SWISX has higher volatility (5.02%) compared to GTMIX (3.61%). In terms of maximum drawdown, GTMIX dropped -58.31% vs SWISX's -60.65%.

Which has better risk-adjusted returns?

GTMIX currently has the higher Sharpe Ratio (2.94 vs 1.56), 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.