NEFOX vs. OAKMX

Last updated Jun 24, 2026

NEFOX (Natixis Funds Trust II Oakmark Fund) and OAKMX (Oakmark Fund Investor Class) are both Large Cap Value Equities funds. Over the past 10 years, NEFOX returned 13.76%/yr vs 13.78%/yr for OAKMX. Their correlation of 0.91 suggests significant overlap in exposure. NEFOX charges 1.05%/yr vs 0.89%/yr for OAKMX.

Performance

NEFOX vs. OAKMX - Performance Comparison

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

Returns By Period

In the year-to-date period, NEFOX achieves a -1.80% return, which is significantly higher than OAKMX's -2.01% return. Both investments have delivered pretty close results over the past 10 years, with NEFOX having a 13.76% annualized return and OAKMX not far ahead at 13.78%.

NEFOX

• 1D: 0.00%
• 1M: -1.07%
• YTD: -1.80%
• 6M: -2.38%
• 1Y: 9.06%
• 3Y*: 14.58%
• 5Y*: 9.84%
• 10Y*: 13.76%

OAKMX

• 1D: 0.00%
• 1M: -1.03%
• YTD: -2.01%
• 6M: -2.54%
• 1Y: 8.70%
• 3Y*: 14.33%
• 5Y*: 9.77%
• 10Y*: 13.78%

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

NEFOX vs. OAKMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NEFOX Natixis Funds Trust II Oakmark Fund	-1.80%	14.77%	15.71%	30.96%	-13.02%	33.94%	13.08%	26.76%	-13.01%	20.76%
OAKMX Oakmark Fund Investor Class	-2.01%	14.13%	16.02%	30.92%	-13.38%	34.85%	12.90%	27.14%	-12.76%	21.12%

Correlation

The correlation between NEFOX and OAKMX is 0.80, 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	0.80
Correlation (3Y) Calculated over the trailing 3-year period	0.82
Correlation (5Y) Calculated over the trailing 5-year period	0.91
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Aug 5, 1991	0.91

The correlation between NEFOX and OAKMX shifts across timeframes, from 0.80 (1 year) to 0.95 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

NEFOX vs. OAKMX — Risk / Return Rank

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

NEFOX

NEFOX Risk / Return Rank: 14
NEFOX Sharpe Ratio Rank: 11
NEFOX Sortino Ratio Rank: 12
NEFOX Omega Ratio Rank: 10
NEFOX Calmar Ratio Rank: 21
NEFOX Martin Ratio Rank: 15

OAKMX

OAKMX Risk / Return Rank: 11
OAKMX Sharpe Ratio Rank: 9
OAKMX Sortino Ratio Rank: 9
OAKMX Omega Ratio Rank: 8
OAKMX Calmar Ratio Rank: 15
OAKMX Martin Ratio Rank: 12

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.

NEFOX vs. OAKMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Natixis Funds Trust II Oakmark Fund (NEFOX) and Oakmark Fund Investor Class (OAKMX). 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.

	NEFOX	OAKMX	Difference
Sharpe ratio: Return per unit of total volatility	0.81	0.68	+0.12
Sortino ratio: Return per unit of downside risk	1.26	1.07	+0.20
Omega ratio: Gain probability vs. loss probability	1.15	1.13	+0.02
Calmar ratio: Return relative to maximum drawdown	1.58	1.29	+0.29
Martin ratio: Return relative to average drawdown	3.89	3.17	+0.72

NEFOX vs. OAKMX - Sharpe Ratio Comparison

The current NEFOX Sharpe Ratio is 0.81, which is comparable to the OAKMX Sharpe Ratio of 0.68. The chart below compares the historical Sharpe Ratios of NEFOX and OAKMX, 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

NEFOX vs. OAKMX - Drawdown Comparison

The maximum NEFOX drawdown since its inception was -62.35%, which is greater than OAKMX's maximum drawdown of -56.19%. Use the drawdown chart below to compare losses from any high point for NEFOX and OAKMX.

Drawdown Indicators

	NEFOX	OAKMX	Difference
Max Drawdown Largest peak-to-trough decline	-62.35%	-56.19%	-6.16%
Max Drawdown (1Y) Largest decline over 1 year	-7.07%	-6.98%	-0.09%
Max Drawdown (3Y) Largest decline over 3 years	-17.25%	-17.05%	-0.20%
Max Drawdown (5Y) Largest decline over 5 years	-23.56%	-23.68%	+0.12%
Max Drawdown (10Y) Largest decline over 10 years	-41.01%	-41.43%	+0.42%
Current Drawdown Current decline from peak	-4.40%	-4.52%	+0.12%
Average Drawdown Average peak-to-trough decline	-12.48%	-6.39%	-6.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.70%	2.84%	-0.14%

Volatility

NEFOX vs. OAKMX - Volatility Comparison

Natixis Funds Trust II Oakmark Fund (NEFOX) and Oakmark Fund Investor Class (OAKMX) have volatilities of 3.86% and 3.77%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NEFOX	OAKMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.86%	3.77%	+0.09%
Volatility (6M) Calculated over the trailing 6-month period	10.36%	9.44%	+0.92%
Volatility (1Y) Calculated over the trailing 1-year period	13.88%	13.20%	+0.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.22%	18.28%	+0.94%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.86%	20.41%	+0.45%

NEFOX vs. OAKMX - Expense Ratio Comparison

NEFOX has a 1.05% expense ratio, which is higher than OAKMX's 0.89% expense ratio.

Dividends

NEFOX vs. OAKMX - Dividend Comparison

NEFOX's dividend yield for the trailing twelve months is around 10.33%, more than OAKMX's 0.94% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
NEFOX Natixis Funds Trust II Oakmark Fund	10.33%	7.14%	6.85%	3.62%	17.00%	7.02%	9.21%	9.34%	10.83%	4.19%	3.66%	4.01%
OAKMX Oakmark Fund Investor Class	0.94%	0.92%	1.12%	1.02%	0.92%	1.94%	0.17%	8.33%	8.13%	4.06%	2.58%	1.43%

Frequently Asked Questions

Can I hold both NEFOX and OAKMX in my portfolio?

NEFOX and OAKMX have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NEFOX or OAKMX?

NEFOX has higher volatility (3.86%) compared to OAKMX (3.77%). In terms of maximum drawdown, NEFOX dropped -62.35% vs OAKMX's -56.19%.

Which has better risk-adjusted returns?

NEFOX currently has the higher Sharpe Ratio (0.81 vs 0.68), 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.