PRAFX vs. OBEGX

Last updated Jun 5, 2026

PRAFX (T. Rowe Price Real Assets Fund) and OBEGX (Oberweis Global Opportunities Fund) are both Global Equities funds. Over the past 10 years, PRAFX returned 8.96%/yr vs 11.89%/yr for OBEGX. A 0.65 correlation means they provide meaningful diversification when combined. PRAFX charges 0.92%/yr vs 1.51%/yr for OBEGX.

Performance

PRAFX vs. OBEGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Real Assets Fund (PRAFX) and Oberweis Global Opportunities Fund (OBEGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PRAFX achieves a 14.08% return, which is significantly lower than OBEGX's 27.35% return. Over the past 10 years, PRAFX has underperformed OBEGX with an annualized return of 8.96%, while OBEGX has yielded a comparatively higher 11.89% annualized return.

PRAFX

• 1D: -0.84%
• 1M: 0.30%
• YTD: 14.08%
• 6M: 15.92%
• 1Y: 36.84%
• 3Y*: 16.86%
• 5Y*: 7.95%
• 10Y*: 8.96%

OBEGX

• 1D: -1.23%
• 1M: 2.43%
• YTD: 27.35%
• 6M: 24.56%
• 1Y: 45.38%
• 3Y*: 19.62%
• 5Y*: 6.51%
• 10Y*: 11.89%

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

PRAFX vs. OBEGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PRAFX T. Rowe Price Real Assets Fund	14.08%	29.51%	0.32%	6.65%	-10.24%	25.74%	7.02%	19.62%	-11.55%	10.48%
OBEGX Oberweis Global Opportunities Fund	27.35%	19.32%	10.72%	6.40%	-26.76%	20.80%	55.68%	25.67%	-25.62%	33.35%

Correlation

The correlation between PRAFX and OBEGX is 0.48, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.48
Correlation (3Y) Calculated over the trailing 3-year period	0.60
Correlation (5Y) Calculated over the trailing 5-year period	0.67
Correlation (10Y) Calculated over the trailing 10-year period	0.63
Correlation (All Time) Calculated using the full available price history since Jul 30, 2010	0.65

The correlation between PRAFX and OBEGX shifts across timeframes, from 0.48 (1 year) to 0.67 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

PRAFX vs. OBEGX — Risk / Return Rank

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

PRAFX

PRAFX Risk / Return Rank: 56
PRAFX Sharpe Ratio Rank: 64
PRAFX Sortino Ratio Rank: 48
PRAFX Omega Ratio Rank: 58
PRAFX Calmar Ratio Rank: 58
PRAFX Martin Ratio Rank: 53

OBEGX

OBEGX Risk / Return Rank: 68
OBEGX Sharpe Ratio Rank: 63
OBEGX Sortino Ratio Rank: 55
OBEGX Omega Ratio Rank: 53
OBEGX Calmar Ratio Rank: 87
OBEGX Martin Ratio Rank: 83

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.

PRAFX vs. OBEGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Real Assets Fund (PRAFX) and Oberweis Global Opportunities Fund (OBEGX). 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.

	PRAFX	OBEGX	Difference
Sharpe ratio: Return per unit of total volatility	2.31	2.29	+0.02
Sortino ratio: Return per unit of downside risk	2.85	3.07	-0.22
Omega ratio: Gain probability vs. loss probability	1.41	1.39	+0.02
Calmar ratio: Return relative to maximum drawdown	2.89	4.17	-1.28
Martin ratio: Return relative to average drawdown	10.64	15.08	-4.44
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PRAFX vs. OBEGX - Sharpe Ratio Comparison

The current PRAFX Sharpe Ratio is 2.31, which is comparable to the OBEGX Sharpe Ratio of 2.29. The chart below compares the historical Sharpe Ratios of PRAFX and OBEGX, 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

	PRAFX	OBEGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.31	2.29	+0.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.45	0.28	+0.17
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.50	0.53	-0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.36	0.24	+0.12

Drawdowns

PRAFX vs. OBEGX - Drawdown Comparison

The maximum PRAFX drawdown since its inception was -38.05%, smaller than the maximum OBEGX drawdown of -83.07%. Use the drawdown chart below to compare losses from any high point for PRAFX and OBEGX.

Drawdown Indicators

	PRAFX	OBEGX	Difference
Max Drawdown Largest peak-to-trough decline	-38.05%	-83.07%	+45.02%
Max Drawdown (1Y) Largest decline over 1 year	-12.91%	-11.24%	-1.67%
Max Drawdown (3Y) Largest decline over 3 years	-16.86%	-25.41%	+8.55%
Max Drawdown (5Y) Largest decline over 5 years	-26.73%	-39.68%	+12.95%
Max Drawdown (10Y) Largest decline over 10 years	-38.05%	-41.54%	+3.49%
Current Drawdown Current decline from peak	-4.63%	-1.23%	-3.40%
Average Drawdown Average peak-to-trough decline	-8.77%	-33.71%	+24.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.49%	3.10%	+0.39%

Volatility

PRAFX vs. OBEGX - Volatility Comparison

The current volatility for T. Rowe Price Real Assets Fund (PRAFX) is 4.89%, while Oberweis Global Opportunities Fund (OBEGX) has a volatility of 7.06%. This indicates that PRAFX experiences smaller price fluctuations and is considered to be less risky than OBEGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PRAFX	OBEGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.89%	7.06%	-2.17%
Volatility (6M) Calculated over the trailing 6-month period	13.29%	15.99%	-2.70%
Volatility (1Y) Calculated over the trailing 1-year period	16.15%	20.49%	-4.34%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.70%	23.20%	-5.50%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.14%	22.63%	-4.49%

PRAFX vs. OBEGX - Expense Ratio Comparison

PRAFX has a 0.92% expense ratio, which is lower than OBEGX's 1.51% expense ratio.

Dividends

PRAFX vs. OBEGX - Dividend Comparison

PRAFX's dividend yield for the trailing twelve months is around 2.58%, less than OBEGX's 9.94% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OBEGX Oberweis Global Opportunities Fund	9.94%	12.66%	0.00%	0.00%	2.64%	25.09%	5.80%	0.00%	6.68%	13.37%	1.12%	14.32%
PRAFX T. Rowe Price Real Assets Fund	2.58%	2.94%	1.56%	1.52%	1.38%	1.83%	1.37%	2.64%	2.58%	1.45%	1.96%	1.88%

Frequently Asked Questions

Can I hold both PRAFX and OBEGX in my portfolio?

PRAFX and OBEGX have a correlation of 0.48, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PRAFX or OBEGX?

OBEGX has higher volatility (7.06%) compared to PRAFX (4.89%). In terms of maximum drawdown, PRAFX dropped -38.05% vs OBEGX's -83.07%.

Which has better risk-adjusted returns?

PRAFX currently has the higher Sharpe Ratio (2.31 vs 2.29), 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.