OBCHX vs. PRASX

Last updated Jul 14, 2026

OBCHX (Oberweis China Opportunities Fund) and PRASX (T. Rowe Price New Asia Fund) are both mutual funds - OBCHX is a China Equities fund managed by Oberweis, while PRASX is a Asia Pacific Equities fund managed by T. Rowe Price. Over the past 10 years, OBCHX returned 10.36%/yr vs 8.95%/yr for PRASX. A 0.77 correlation means they provide meaningful diversification when combined. OBCHX charges 2.03%/yr vs 0.99%/yr for PRASX.

Performance

OBCHX vs. PRASX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oberweis China Opportunities Fund (OBCHX) and T. Rowe Price New Asia Fund (PRASX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OBCHX achieves a 30.70% return, which is significantly higher than PRASX's 24.07% return. Over the past 10 years, OBCHX has outperformed PRASX with an annualized return of 10.36%, while PRASX has yielded a comparatively lower 8.95% annualized return.

OBCHX

• 1D: -1.88%
• 1M: 1.62%
• 6M: 20.65%
• YTD: 30.70%
• 1Y: 51.76%
• 3Y*: 25.04%
• 5Y*: 1.07%
• 10Y*: 10.36%

PRASX

• 1D: -0.23%
• 1M: -0.83%
• 6M: 17.17%
• YTD: 24.07%
• 1Y: 41.76%
• 3Y*: 18.07%
• 5Y*: 4.03%
• 10Y*: 8.95%

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

OBCHX vs. PRASX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OBCHX Oberweis China Opportunities Fund	30.70%	40.89%	7.28%	-7.70%	-37.21%	-5.16%	57.06%	36.32%	-25.94%	54.99%
PRASX T. Rowe Price New Asia Fund	24.07%	26.60%	6.97%	0.83%	-22.60%	-4.33%	29.56%	26.75%	-15.13%	40.64%

Correlation

The correlation between OBCHX and PRASX 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 (5Y) Calculated over the trailing 5-year period	0.74
Correlation (10Y) Calculated over the trailing 10-year period	0.78
Correlation (All Time) Calculated using the full available price history since Oct 4, 2005	0.77

The correlation between OBCHX and PRASX has been stable across timeframes, ranging from 0.72 to 0.78 - a consistent structural relationship.

Return for Risk

OBCHX vs. PRASX — Risk / Return Rank

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

OBCHX

OBCHX Risk / Return Rank: 84
OBCHX Sharpe Ratio Rank: 84
OBCHX Sortino Ratio Rank: 74
OBCHX Omega Ratio Rank: 76
OBCHX Calmar Ratio Rank: 97
OBCHX Martin Ratio Rank: 89

PRASX

PRASX Risk / Return Rank: 66
PRASX Sharpe Ratio Rank: 64
PRASX Sortino Ratio Rank: 49
PRASX Omega Ratio Rank: 69
PRASX Calmar Ratio Rank: 80
PRASX Martin Ratio Rank: 69

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.

OBCHX vs. PRASX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oberweis China Opportunities Fund (OBCHX) and T. Rowe Price New Asia Fund (PRASX). 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.

	OBCHX	PRASX	Difference
Sharpe ratio: Return per unit of total volatility	2.19	1.77	+0.42
Sortino ratio: Return per unit of downside risk	2.76	2.25	+0.51
Omega ratio: Gain probability vs. loss probability	1.37	1.34	+0.03
Calmar ratio: Return relative to maximum drawdown	5.46	2.90	+2.56
Martin ratio: Return relative to average drawdown	13.27	10.19	+3.08

OBCHX vs. PRASX - Sharpe Ratio Comparison

The current OBCHX Sharpe Ratio is 2.19, which is comparable to the PRASX Sharpe Ratio of 1.77. The chart below compares the historical Sharpe Ratios of OBCHX and PRASX, 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

OBCHX vs. PRASX - Drawdown Comparison

The maximum OBCHX drawdown since its inception was -74.03%, roughly equal to the maximum PRASX drawdown of -70.53%. Use the drawdown chart below to compare losses from any high point for OBCHX and PRASX.

Drawdown Indicators

	OBCHX	PRASX	Difference
Max Drawdown Largest peak-to-trough decline	-74.03%	-70.53%	-3.50%
Max Drawdown (1Y) Largest decline over 1 year	-9.59%	-14.39%	+4.80%
Max Drawdown (3Y) Largest decline over 3 years	-23.88%	-18.34%	-5.54%
Max Drawdown (5Y) Largest decline over 5 years	-51.78%	-40.20%	-11.58%
Max Drawdown (10Y) Largest decline over 10 years	-59.47%	-45.07%	-14.40%
Current Drawdown Current decline from peak	-12.88%	-6.34%	-6.54%
Average Drawdown Average peak-to-trough decline	-25.64%	-18.49%	-7.15%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.94%	4.09%	-0.15%

Volatility

OBCHX vs. PRASX - Volatility Comparison

The current volatility for Oberweis China Opportunities Fund (OBCHX) is 9.24%, while T. Rowe Price New Asia Fund (PRASX) has a volatility of 12.25%. This indicates that OBCHX experiences smaller price fluctuations and is considered to be less risky than PRASX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OBCHX	PRASX	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.24%	12.25%	-3.01%
Volatility (6M) Calculated over the trailing 6-month period	18.46%	21.48%	-3.02%
Volatility (1Y) Calculated over the trailing 1-year period	23.88%	23.64%	+0.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	27.04%	20.00%	+7.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.30%	18.75%	+6.55%

OBCHX vs. PRASX - Expense Ratio Comparison

OBCHX has a 2.03% expense ratio, which is higher than PRASX's 0.99% expense ratio.

Dividends

OBCHX vs. PRASX - Dividend Comparison

OBCHX's dividend yield for the trailing twelve months is around 0.77%, more than PRASX's 0.50% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OBCHX Oberweis China Opportunities Fund	0.77%	1.01%	2.16%	0.46%	1.22%	41.65%	11.50%	3.37%	26.11%	6.26%	0.81%	11.05%
PRASX T. Rowe Price New Asia Fund	0.50%	0.62%	1.05%	1.77%	1.96%	14.22%	0.46%	0.77%	7.23%	9.15%	0.46%	1.31%

Frequently Asked Questions

Can I hold both OBCHX and PRASX in my portfolio?

OBCHX and PRASX 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, OBCHX or PRASX?

PRASX has higher volatility (12.25%) compared to OBCHX (9.24%). In terms of maximum drawdown, OBCHX dropped -74.03% vs PRASX's -70.53%.

Which has better risk-adjusted returns?

OBCHX currently has the higher Sharpe Ratio (2.19 vs 1.77), 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.