GTMIX vs. GBFFX

Last updated Jun 5, 2026

GTMIX (GMO Tax-Managed International Equities Fund) and GBFFX (GMO Benchmark-Free Fund) are both mutual funds - GTMIX is a Foreign Large Cap Equities fund managed by GMO, while GBFFX is a Global Allocation fund managed by GMO. Over the past 10 years, GTMIX returned 10.11%/yr vs 7.18%/yr for GBFFX. Their correlation of 0.87 suggests significant overlap in exposure. GTMIX charges 0.68%/yr vs 0.35%/yr for GBFFX.

Performance

GTMIX vs. GBFFX - Performance Comparison

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

Returns By Period

In the year-to-date period, GTMIX achieves a 13.73% return, which is significantly higher than GBFFX's 12.16% return. Over the past 10 years, GTMIX has outperformed GBFFX with an annualized return of 10.11%, while GBFFX has yielded a comparatively lower 7.18% annualized return.

GTMIX

• 1D: -0.53%
• 1M: 1.64%
• YTD: 13.73%
• 6M: 17.66%
• 1Y: 38.38%
• 3Y*: 22.26%
• 5Y*: 10.75%
• 10Y*: 10.11%

GBFFX

• 1D: 0.04%
• 1M: 2.81%
• YTD: 12.16%
• 6M: 14.23%
• 1Y: 29.26%
• 3Y*: 15.79%
• 5Y*: 8.06%
• 10Y*: 7.18%

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

GTMIX vs. GBFFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
GTMIX GMO Tax-Managed International Equities Fund	13.73%	46.17%	1.54%	14.96%	-10.13%	10.71%	7.50%	23.35%	-21.23%	28.45%
GBFFX GMO Benchmark-Free Fund	12.16%	24.07%	0.40%	15.24%	-3.36%	4.38%	-3.35%	13.79%	-7.12%	17.06%

Correlation

The correlation between GTMIX and GBFFX is 0.90, 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	0.90
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.87
Correlation (10Y) Calculated over the trailing 10-year period	0.87
Correlation (All Time) Calculated using the full available price history since Jul 13, 2015	0.87

The correlation between GTMIX and GBFFX has been stable across timeframes, ranging from 0.86 to 0.92 - a consistent structural relationship.

Return for Risk

GTMIX vs. GBFFX — Risk / Return Rank

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

GTMIX

GTMIX Risk / Return Rank: 88
GTMIX Sharpe Ratio Rank: 90
GTMIX Sortino Ratio Rank: 86
GTMIX Omega Ratio Rank: 81
GTMIX Calmar Ratio Rank: 92
GTMIX Martin Ratio Rank: 92

GBFFX

GBFFX Risk / Return Rank: 96
GBFFX Sharpe Ratio Rank: 99
GBFFX Sortino Ratio Rank: 98
GBFFX Omega Ratio Rank: 96
GBFFX Calmar Ratio Rank: 93
GBFFX Martin Ratio Rank: 93

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. GBFFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for GMO Tax-Managed International Equities Fund (GTMIX) and GMO Benchmark-Free Fund (GBFFX). 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.

	GTMIX	GBFFX	Difference
Sharpe ratio: Return per unit of total volatility	3.00	4.25	-1.25
Sortino ratio: Return per unit of downside risk	4.11	6.13	-2.01
Omega ratio: Gain probability vs. loss probability	1.54	1.86	-0.32
Calmar ratio: Return relative to maximum drawdown	4.87	5.24	-0.37
Martin ratio: Return relative to average drawdown	18.77	20.15	-1.39
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

GTMIX vs. GBFFX - Sharpe Ratio Comparison

The current GTMIX Sharpe Ratio is 3.00, which is comparable to the GBFFX Sharpe Ratio of 4.25. The chart below compares the historical Sharpe Ratios of GTMIX and GBFFX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	GTMIX	GBFFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.00	4.25	-1.25
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.72	1.00	-0.28
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.63	0.79	-0.16
Sharpe Ratio (All Time) Calculated using the full available price history	0.41	0.70	-0.30

Drawdowns

GTMIX vs. GBFFX - Drawdown Comparison

The maximum GTMIX drawdown since its inception was -58.31%, which is greater than GBFFX's maximum drawdown of -26.62%. Use the drawdown chart below to compare losses from any high point for GTMIX and GBFFX.

Drawdown Indicators

	GTMIX	GBFFX	Difference
Max Drawdown Largest peak-to-trough decline	-58.31%	-26.62%	-31.69%
Max Drawdown (1Y) Largest decline over 1 year	-7.90%	-5.67%	-2.23%
Max Drawdown (3Y) Largest decline over 3 years	-14.11%	-10.18%	-3.93%
Max Drawdown (5Y) Largest decline over 5 years	-28.81%	-15.91%	-12.90%
Max Drawdown (10Y) Largest decline over 10 years	-40.32%	-26.62%	-13.70%
Current Drawdown Current decline from peak	-0.80%	0.00%	-0.80%
Average Drawdown Average peak-to-trough decline	-12.68%	-4.37%	-8.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.05%	1.47%	+0.58%

Volatility

GTMIX vs. GBFFX - Volatility Comparison

GMO Tax-Managed International Equities Fund (GTMIX) has a higher volatility of 3.31% compared to GMO Benchmark-Free Fund (GBFFX) at 2.28%. This indicates that GTMIX's price experiences larger fluctuations and is considered to be riskier than GBFFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	GTMIX	GBFFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.31%	2.28%	+1.03%
Volatility (6M) Calculated over the trailing 6-month period	9.69%	5.38%	+4.31%
Volatility (1Y) Calculated over the trailing 1-year period	12.85%	6.99%	+5.86%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.93%	8.07%	+6.86%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.05%	9.08%	+6.97%

GTMIX vs. GBFFX - Expense Ratio Comparison

GTMIX has a 0.68% expense ratio, which is higher than GBFFX's 0.35% expense ratio.

Dividends

GTMIX vs. GBFFX - Dividend Comparison

GTMIX's dividend yield for the trailing twelve months is around 19.73%, more than GBFFX's 4.56% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GBFFX GMO Benchmark-Free Fund	4.56%	5.11%	1.81%	5.72%	5.48%	4.60%	3.32%	4.00%	3.92%	2.90%	2.72%	6.67%
GTMIX GMO Tax-Managed International Equities Fund	19.73%	22.43%	5.94%	0.36%	5.44%	16.55%	2.25%	4.13%	7.25%	2.96%	4.05%	3.26%

Frequently Asked Questions

Can I hold both GTMIX and GBFFX in my portfolio?

With a correlation of 0.90, GTMIX and GBFFX 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 GBFFX?

GTMIX has higher volatility (3.31%) compared to GBFFX (2.28%). In terms of maximum drawdown, GTMIX dropped -58.31% vs GBFFX's -26.62%.

Which has better risk-adjusted returns?

GBFFX currently has the higher Sharpe Ratio (4.25 vs 3.00), 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.