GAFYX vs. NEFOX

Last updated Jun 3, 2026

GAFYX (AlphaSimplex Global Alternatives Fund) and NEFOX (Natixis Funds Trust II Oakmark Fund) are both mutual funds - GAFYX is a Multistrategy fund managed by Natixis, while NEFOX is a Large Cap Value Equities fund managed by Natixis. Over the past 10 years, GAFYX returned 4.85%/yr vs 13.47%/yr for NEFOX. A 0.68 correlation means they provide meaningful diversification when combined. GAFYX charges 1.24%/yr vs 1.05%/yr for NEFOX.

Performance

GAFYX vs. NEFOX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AlphaSimplex Global Alternatives Fund (GAFYX) and Natixis Funds Trust II Oakmark Fund (NEFOX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, GAFYX achieves a 10.52% return, which is significantly higher than NEFOX's 0.16% return. Over the past 10 years, GAFYX has underperformed NEFOX with an annualized return of 4.85%, while NEFOX has yielded a comparatively higher 13.47% annualized return.

GAFYX

• 1D: 0.55%
• 1M: 2.17%
• YTD: 10.52%
• 6M: 11.00%
• 1Y: 17.36%
• 3Y*: 9.43%
• 5Y*: 5.68%
• 10Y*: 4.85%

NEFOX

• 1D: 0.87%
• 1M: 0.03%
• YTD: 0.16%
• 6M: 4.56%
• 1Y: 13.54%
• 3Y*: 15.66%
• 5Y*: 9.73%
• 10Y*: 13.47%

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

GAFYX vs. NEFOX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
GAFYX AlphaSimplex Global Alternatives Fund	10.52%	6.68%	9.66%	3.77%	-0.49%	1.29%	-2.12%	10.49%	-6.21%	11.12%
NEFOX Natixis Funds Trust II Oakmark Fund	0.16%	14.77%	15.71%	30.96%	-13.02%	33.94%	13.08%	26.76%	-13.01%	20.76%

Correlation

The correlation between GAFYX and NEFOX is 0.45, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.45
Correlation (3Y) Calculated over the trailing 3-year period	0.58
Correlation (5Y) Calculated over the trailing 5-year period	0.68
Correlation (10Y) Calculated over the trailing 10-year period	0.69
Correlation (All Time) Calculated using the full available price history since Oct 2, 2008	0.68

Over the past year, the correlation between GAFYX and NEFOX has dropped to 0.45 - well below their long-term average of 0.68, suggesting their price drivers have been diverging.

Return for Risk

GAFYX vs. NEFOX — Risk / Return Rank

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

GAFYX

GAFYX Risk / Return Rank: 71
GAFYX Sharpe Ratio Rank: 64
GAFYX Sortino Ratio Rank: 66
GAFYX Omega Ratio Rank: 71
GAFYX Calmar Ratio Rank: 74
GAFYX Martin Ratio Rank: 79

NEFOX

NEFOX Risk / Return Rank: 14
NEFOX Sharpe Ratio Rank: 17
NEFOX Sortino Ratio Rank: 17
NEFOX Omega Ratio Rank: 16
NEFOX Calmar Ratio Rank: 9
NEFOX Martin Ratio Rank: 11

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.

GAFYX vs. NEFOX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AlphaSimplex Global Alternatives Fund (GAFYX) and Natixis Funds Trust II Oakmark Fund (NEFOX). 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.

	GAFYX	NEFOX	Difference
Sharpe ratio Return per unit of total volatility	2.36	1.17	+1.19
Sortino ratio Return per unit of downside risk	3.41	1.79	+1.62
Omega ratio Gain probability vs. loss probability	1.47	1.21	+0.26
Calmar ratio Return relative to maximum drawdown	3.37	0.94	+2.43
Martin ratio Return relative to average drawdown	14.93	3.53	+11.40
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

GAFYX vs. NEFOX - Sharpe Ratio Comparison

The current GAFYX Sharpe Ratio is 2.36, which is higher than the NEFOX Sharpe Ratio of 1.17. The chart below compares the historical Sharpe Ratios of GAFYX and NEFOX, 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

	GAFYX	NEFOX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.36	1.17	+1.19
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.79	0.53	+0.27
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.72	0.66	+0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.55	0.36	+0.18

Drawdowns

GAFYX vs. NEFOX - Drawdown Comparison

The maximum GAFYX drawdown since its inception was -19.49%, smaller than the maximum NEFOX drawdown of -62.35%. Use the drawdown chart below to compare losses from any high point for GAFYX and NEFOX.

Drawdown Indicators

	GAFYX	NEFOX	Difference
Max Drawdown Largest peak-to-trough decline	-19.49%	-62.35%	+42.86%
Max Drawdown (1Y) Largest decline over 1 year	-5.19%	-7.07%	+1.88%
Max Drawdown (3Y) Largest decline over 3 years	-9.74%	-17.25%	+7.51%
Max Drawdown (5Y) Largest decline over 5 years	-9.74%	-23.56%	+13.82%
Max Drawdown (10Y) Largest decline over 10 years	-13.26%	-41.01%	+27.75%
Current Drawdown Current decline from peak	0.00%	-2.50%	+2.50%
Average Drawdown Average peak-to-trough decline	-4.63%	-12.49%	+7.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.17%	3.55%	-2.38%

Volatility

GAFYX vs. NEFOX - Volatility Comparison

The current volatility for AlphaSimplex Global Alternatives Fund (GAFYX) is 2.27%, while Natixis Funds Trust II Oakmark Fund (NEFOX) has a volatility of 2.89%. This indicates that GAFYX experiences smaller price fluctuations and is considered to be less risky than NEFOX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	GAFYX	NEFOX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.27%	2.89%	-0.62%
Volatility (6M) Calculated over the trailing 6-month period	6.38%	10.33%	-3.95%
Volatility (1Y) Calculated over the trailing 1-year period	7.45%	13.65%	-6.20%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.19%	19.21%	-12.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.75%	20.85%	-14.10%

GAFYX vs. NEFOX - Expense Ratio Comparison

GAFYX has a 1.24% expense ratio, which is higher than NEFOX's 1.05% expense ratio.

Dividends

GAFYX vs. NEFOX - Dividend Comparison

GAFYX has not paid dividends to shareholders, while NEFOX's dividend yield for the trailing twelve months is around 10.13%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GAFYX AlphaSimplex Global Alternatives Fund	0.00%	0.00%	0.00%	5.24%	9.57%	0.00%	2.57%	1.16%	1.37%	0.74%	0.00%	3.53%
NEFOX Natixis Funds Trust II Oakmark Fund	10.13%	7.14%	6.85%	3.62%	17.00%	7.02%	9.21%	9.34%	10.83%	4.19%	3.66%	4.01%

Frequently Asked Questions

Can I hold both GAFYX and NEFOX in my portfolio?

GAFYX and NEFOX have a correlation of 0.45, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, GAFYX or NEFOX?

NEFOX has higher volatility (2.89%) compared to GAFYX (2.27%). In terms of maximum drawdown, GAFYX dropped -19.49% vs NEFOX's -62.35%.

Which has better risk-adjusted returns?

GAFYX currently has the higher Sharpe Ratio (2.36 vs 1.17), 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.