OAKEX vs. ARHBX

Last updated Jun 3, 2026

OAKEX (Oakmark International Small Cap Fund) and ARHBX (Artisan International Explorer Fund) are both Foreign Small & Mid Cap Equities funds. Over the past 3 years, OAKEX returned 11.08%/yr vs 19.62%/yr for ARHBX. A 0.76 correlation means they provide meaningful diversification when combined. OAKEX charges 1.34%/yr vs 1.35%/yr for ARHBX.

Performance

OAKEX vs. ARHBX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oakmark International Small Cap Fund (OAKEX) and Artisan International Explorer Fund (ARHBX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OAKEX achieves a 0.23% return, which is significantly lower than ARHBX's 24.92% return.

OAKEX

• 1D: -0.18%
• 1M: 3.24%
• YTD: 0.23%
• 6M: 4.79%
• 1Y: 6.67%
• 3Y*: 11.08%
• 5Y*: 4.18%
• 10Y*: 7.57%

ARHBX

• 1D: 1.75%
• 1M: 8.96%
• YTD: 24.92%
• 6M: 28.33%
• 1Y: 29.08%
• 3Y*: 19.62%
• 5Y*: —
• 10Y*: —

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

OAKEX vs. ARHBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
OAKEX Oakmark International Small Cap Fund	0.23%	29.51%	-3.00%	19.59%	5.08%
ARHBX Artisan International Explorer Fund	24.92%	18.32%	8.34%	20.65%	-2.64%

Correlation

The correlation between OAKEX and ARHBX is 0.72, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.72
Correlation (3Y) Calculated over the trailing 3-year period	0.73
Correlation (All Time) Calculated using the full available price history since May 17, 2022	0.76

The correlation between OAKEX and ARHBX has been stable across timeframes, ranging from 0.72 to 0.76 - a consistent structural relationship.

Return for Risk

OAKEX vs. ARHBX — Risk / Return Rank

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

OAKEX

OAKEX Risk / Return Rank: 5
OAKEX Sharpe Ratio Rank: 5
OAKEX Sortino Ratio Rank: 5
OAKEX Omega Ratio Rank: 5
OAKEX Calmar Ratio Rank: 4
OAKEX Martin Ratio Rank: 5

ARHBX

ARHBX Risk / Return Rank: 51
ARHBX Sharpe Ratio Rank: 48
ARHBX Sortino Ratio Rank: 47
ARHBX Omega Ratio Rank: 47
ARHBX Calmar Ratio Rank: 67
ARHBX Martin Ratio Rank: 43

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.

OAKEX vs. ARHBX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oakmark International Small Cap Fund (OAKEX) and Artisan International Explorer Fund (ARHBX). 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.

	OAKEX	ARHBX	Difference
Sharpe ratio Return per unit of total volatility	0.45	2.03	-1.59
Sortino ratio Return per unit of downside risk	0.73	2.90	-2.17
Omega ratio Gain probability vs. loss probability	1.09	1.37	-0.28
Calmar ratio Return relative to maximum drawdown	0.38	3.18	-2.80
Martin ratio Return relative to average drawdown	1.12	9.25	-8.13
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OAKEX vs. ARHBX - Sharpe Ratio Comparison

The current OAKEX Sharpe Ratio is 0.45, which is lower than the ARHBX Sharpe Ratio of 2.03. The chart below compares the historical Sharpe Ratios of OAKEX and ARHBX, 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

	OAKEX	ARHBX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.45	2.03	-1.59
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.24	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.41	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	1.18	-0.75

Drawdowns

OAKEX vs. ARHBX - Drawdown Comparison

The maximum OAKEX drawdown since its inception was -70.12%, which is greater than ARHBX's maximum drawdown of -18.10%. Use the drawdown chart below to compare losses from any high point for OAKEX and ARHBX.

Drawdown Indicators

	OAKEX	ARHBX	Difference
Max Drawdown Largest peak-to-trough decline	-70.12%	-18.10%	-52.02%
Max Drawdown (1Y) Largest decline over 1 year	-17.18%	-9.51%	-7.67%
Max Drawdown (3Y) Largest decline over 3 years	-17.18%	-14.20%	-2.98%
Max Drawdown (5Y) Largest decline over 5 years	-38.40%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-49.61%	—	—
Current Drawdown Current decline from peak	-4.93%	0.00%	-4.93%
Average Drawdown Average peak-to-trough decline	-13.49%	-3.54%	-9.95%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.76%	3.27%	+2.49%

Volatility

OAKEX vs. ARHBX - Volatility Comparison

The current volatility for Oakmark International Small Cap Fund (OAKEX) is 3.46%, while Artisan International Explorer Fund (ARHBX) has a volatility of 6.55%. This indicates that OAKEX experiences smaller price fluctuations and is considered to be less risky than ARHBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OAKEX	ARHBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.46%	6.55%	-3.09%
Volatility (6M) Calculated over the trailing 6-month period	11.38%	12.86%	-1.48%
Volatility (1Y) Calculated over the trailing 1-year period	14.86%	14.89%	-0.03%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.69%	14.44%	+3.25%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.66%	14.44%	+4.22%

OAKEX vs. ARHBX - Expense Ratio Comparison

OAKEX has a 1.34% expense ratio, which is lower than ARHBX's 1.35% expense ratio.

Dividends

OAKEX vs. ARHBX - Dividend Comparison

OAKEX's dividend yield for the trailing twelve months is around 5.23%, less than ARHBX's 5.96% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ARHBX Artisan International Explorer Fund	5.96%	7.44%	4.86%	1.97%	0.16%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
OAKEX Oakmark International Small Cap Fund	5.23%	5.24%	6.38%	1.83%	1.89%	0.61%	1.87%	0.21%	8.93%	3.64%	3.09%	5.06%

Frequently Asked Questions

Can I hold both OAKEX and ARHBX in my portfolio?

OAKEX and ARHBX have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OAKEX or ARHBX?

ARHBX has higher volatility (6.55%) compared to OAKEX (3.46%). In terms of maximum drawdown, OAKEX dropped -70.12% vs ARHBX's -18.10%.

Which has better risk-adjusted returns?

ARHBX currently has the higher Sharpe Ratio (2.03 vs 0.45), 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.