RTXAX vs. OBEGX

Last updated Jun 4, 2026

RTXAX (Russell Investment Tax-Managed Real Assets Fund) and OBEGX (Oberweis Global Opportunities Fund) are both Global Equities funds. Over the past 5 years, RTXAX returned 6.43%/yr vs 6.92%/yr for OBEGX. A 0.64 correlation means they provide meaningful diversification when combined. RTXAX charges 1.33%/yr vs 1.51%/yr for OBEGX.

Performance

RTXAX vs. OBEGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Russell Investment Tax-Managed Real Assets Fund (RTXAX) 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, RTXAX achieves a 16.52% return, which is significantly lower than OBEGX's 28.94% return.

RTXAX

• 1D: 1.04%
• 1M: -0.39%
• YTD: 16.52%
• 6M: 16.24%
• 1Y: 27.87%
• 3Y*: 12.66%
• 5Y*: 6.43%
• 10Y*: —

OBEGX

• 1D: 1.71%
• 1M: 7.16%
• YTD: 28.94%
• 6M: 27.03%
• 1Y: 48.45%
• 3Y*: 20.12%
• 5Y*: 6.92%
• 10Y*: 12.03%

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

RTXAX vs. OBEGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
RTXAX Russell Investment Tax-Managed Real Assets Fund	16.52%	13.56%	1.50%	7.40%	-11.66%	26.57%	3.73%	6.17%
OBEGX Oberweis Global Opportunities Fund	28.94%	19.32%	10.72%	6.40%	-26.76%	20.80%	55.68%	7.59%

Correlation

The correlation between RTXAX and OBEGX is 0.44, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.44
Correlation (3Y) Calculated over the trailing 3-year period	0.58
Correlation (5Y) Calculated over the trailing 5-year period	0.64
Correlation (All Time) Calculated using the full available price history since Jun 19, 2019	0.64

The correlation between RTXAX and OBEGX shifts across timeframes, from 0.44 (1 year) to 0.64 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

RTXAX vs. OBEGX — Risk / Return Rank

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

RTXAX

RTXAX Risk / Return Rank: 81
RTXAX Sharpe Ratio Rank: 79
RTXAX Sortino Ratio Rank: 72
RTXAX Omega Ratio Rank: 66
RTXAX Calmar Ratio Rank: 93
RTXAX Martin Ratio Rank: 94

OBEGX

OBEGX Risk / Return Rank: 73
OBEGX Sharpe Ratio Rank: 72
OBEGX Sortino Ratio Rank: 60
OBEGX Omega Ratio Rank: 56
OBEGX Calmar Ratio Rank: 89
OBEGX Martin Ratio Rank: 85

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.

RTXAX vs. OBEGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Russell Investment Tax-Managed Real Assets Fund (RTXAX) 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.

	RTXAX	OBEGX	Difference
Sharpe ratio: Return per unit of total volatility	2.59	2.48	+0.11
Sortino ratio: Return per unit of downside risk	3.52	3.27	+0.25
Omega ratio: Gain probability vs. loss probability	1.45	1.42	+0.03
Calmar ratio: Return relative to maximum drawdown	5.36	4.50	+0.85
Martin ratio: Return relative to average drawdown	20.98	16.29	+4.69
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RTXAX vs. OBEGX - Sharpe Ratio Comparison

The current RTXAX Sharpe Ratio is 2.59, which is comparable to the OBEGX Sharpe Ratio of 2.48. The chart below compares the historical Sharpe Ratios of RTXAX 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

	RTXAX	OBEGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.59	2.48	+0.11
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.41	0.30	+0.11
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.53	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.24	+0.19

Drawdowns

RTXAX vs. OBEGX - Drawdown Comparison

The maximum RTXAX drawdown since its inception was -40.68%, smaller than the maximum OBEGX drawdown of -83.07%. Use the drawdown chart below to compare losses from any high point for RTXAX and OBEGX.

Drawdown Indicators

	RTXAX	OBEGX	Difference
Max Drawdown Largest peak-to-trough decline	-40.68%	-83.07%	+42.39%
Max Drawdown (1Y) Largest decline over 1 year	-5.21%	-11.24%	+6.03%
Max Drawdown (3Y) Largest decline over 3 years	-17.13%	-25.41%	+8.28%
Max Drawdown (5Y) Largest decline over 5 years	-24.63%	-39.68%	+15.05%
Max Drawdown (10Y) Largest decline over 10 years	—	-41.54%	—
Current Drawdown Current decline from peak	-1.27%	0.00%	-1.27%
Average Drawdown Average peak-to-trough decline	-7.78%	-33.72%	+25.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.33%	3.10%	-1.77%

Volatility

RTXAX vs. OBEGX - Volatility Comparison

The current volatility for Russell Investment Tax-Managed Real Assets Fund (RTXAX) is 3.03%, while Oberweis Global Opportunities Fund (OBEGX) has a volatility of 6.92%. This indicates that RTXAX 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

	RTXAX	OBEGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.03%	6.92%	-3.89%
Volatility (6M) Calculated over the trailing 6-month period	8.05%	16.00%	-7.95%
Volatility (1Y) Calculated over the trailing 1-year period	10.79%	20.47%	-9.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.83%	23.20%	-7.37%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.07%	22.63%	-2.56%

RTXAX vs. OBEGX - Expense Ratio Comparison

RTXAX has a 1.33% expense ratio, which is lower than OBEGX's 1.51% expense ratio.

Dividends

RTXAX vs. OBEGX - Dividend Comparison

RTXAX's dividend yield for the trailing twelve months is around 2.46%, less than OBEGX's 9.82% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OBEGX Oberweis Global Opportunities Fund	9.82%	12.66%	0.00%	0.00%	2.64%	25.09%	5.80%	0.00%	6.68%	13.37%	1.12%	14.32%
RTXAX Russell Investment Tax-Managed Real Assets Fund	2.46%	2.86%	2.05%	1.98%	3.11%	1.74%	1.71%	0.84%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both RTXAX and OBEGX in my portfolio?

RTXAX and OBEGX have a correlation of 0.44, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RTXAX or OBEGX?

OBEGX has higher volatility (6.92%) compared to RTXAX (3.03%). In terms of maximum drawdown, RTXAX dropped -40.68% vs OBEGX's -83.07%.

Which has better risk-adjusted returns?

RTXAX currently has the higher Sharpe Ratio (2.59 vs 2.48), 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.