RTHAX vs. ISHYX

Last updated Jun 6, 2026

RTHAX (Russell Investments Tax-Exempt High Yield Bond Fund) and ISHYX (Invesco Short Duration High Yield Municipal Fund) are both High Yield Muni funds. Over the past 10 years, RTHAX returned 2.93%/yr vs 2.86%/yr for ISHYX. A 0.70 correlation means they provide meaningful diversification when combined. RTHAX charges 0.89%/yr vs 0.59%/yr for ISHYX.

Performance

RTHAX vs. ISHYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Russell Investments Tax-Exempt High Yield Bond Fund (RTHAX) and Invesco Short Duration High Yield Municipal Fund (ISHYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RTHAX achieves a 2.67% return, which is significantly higher than ISHYX's 2.40% return. Both investments have delivered pretty close results over the past 10 years, with RTHAX having a 2.93% annualized return and ISHYX not far behind at 2.86%.

RTHAX

• 1D: 0.10%
• 1M: 0.86%
• YTD: 2.67%
• 6M: 2.77%
• 1Y: 6.99%
• 3Y*: 4.49%
• 5Y*: 0.63%
• 10Y*: 2.93%

ISHYX

• 1D: 0.11%
• 1M: 0.50%
• YTD: 2.40%
• 6M: 3.01%
• 1Y: 6.83%
• 3Y*: 4.89%
• 5Y*: 1.72%
• 10Y*: 2.86%

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

RTHAX vs. ISHYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RTHAX Russell Investments Tax-Exempt High Yield Bond Fund	2.67%	2.11%	4.49%	7.78%	-13.62%	5.54%	3.84%	10.18%	3.20%	8.19%
ISHYX Invesco Short Duration High Yield Municipal Fund	2.40%	3.92%	6.43%	3.58%	-8.99%	5.96%	-0.31%	7.84%	2.27%	8.04%

Correlation

The correlation between RTHAX and ISHYX is 0.63, 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	0.63
Correlation (3Y) Calculated over the trailing 3-year period	0.74
Correlation (5Y) Calculated over the trailing 5-year period	0.78
Correlation (10Y) Calculated over the trailing 10-year period	0.71
Correlation (All Time) Calculated using the full available price history since Jan 5, 2016	0.70

The correlation between RTHAX and ISHYX shifts across timeframes, from 0.63 (1 year) to 0.78 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

RTHAX vs. ISHYX — Risk / Return Rank

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

RTHAX

RTHAX Risk / Return Rank: 67
RTHAX Sharpe Ratio Rank: 77
RTHAX Sortino Ratio Rank: 79
RTHAX Omega Ratio Rank: 91
RTHAX Calmar Ratio Rank: 49
RTHAX Martin Ratio Rank: 41

ISHYX

ISHYX Risk / Return Rank: 89
ISHYX Sharpe Ratio Rank: 92
ISHYX Sortino Ratio Rank: 97
ISHYX Omega Ratio Rank: 96
ISHYX Calmar Ratio Rank: 83
ISHYX Martin Ratio Rank: 77

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.

RTHAX vs. ISHYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Russell Investments Tax-Exempt High Yield Bond Fund (RTHAX) and Invesco Short Duration High Yield Municipal Fund (ISHYX). 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.

	RTHAX	ISHYX	Difference
Sharpe ratio: Return per unit of total volatility	2.48	3.05	-0.56
Sortino ratio: Return per unit of downside risk	3.71	5.59	-1.89
Omega ratio: Gain probability vs. loss probability	1.66	1.84	-0.18
Calmar ratio: Return relative to maximum drawdown	2.60	3.71	-1.11
Martin ratio: Return relative to average drawdown	8.54	13.94	-5.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RTHAX vs. ISHYX - Sharpe Ratio Comparison

The current RTHAX Sharpe Ratio is 2.48, which is comparable to the ISHYX Sharpe Ratio of 3.05. The chart below compares the historical Sharpe Ratios of RTHAX and ISHYX, 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

	RTHAX	ISHYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.48	3.05	-0.56
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.12	0.56	-0.43
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	0.86	-0.27
Sharpe Ratio (All Time) Calculated using the full available price history	0.67	0.95	-0.28

Drawdowns

RTHAX vs. ISHYX - Drawdown Comparison

The maximum RTHAX drawdown since its inception was -18.89%, which is greater than ISHYX's maximum drawdown of -13.64%. Use the drawdown chart below to compare losses from any high point for RTHAX and ISHYX.

Drawdown Indicators

	RTHAX	ISHYX	Difference
Max Drawdown Largest peak-to-trough decline	-18.89%	-13.64%	-5.25%
Max Drawdown (1Y) Largest decline over 1 year	-2.74%	-1.89%	-0.85%
Max Drawdown (3Y) Largest decline over 3 years	-7.56%	-4.03%	-3.53%
Max Drawdown (5Y) Largest decline over 5 years	-18.89%	-12.03%	-6.86%
Max Drawdown (10Y) Largest decline over 10 years	-18.89%	-13.64%	-5.25%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-3.73%	-2.64%	-1.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.83%	0.50%	+0.33%

Volatility

RTHAX vs. ISHYX - Volatility Comparison

Russell Investments Tax-Exempt High Yield Bond Fund (RTHAX) has a higher volatility of 1.09% compared to Invesco Short Duration High Yield Municipal Fund (ISHYX) at 0.87%. This indicates that RTHAX's price experiences larger fluctuations and is considered to be riskier than ISHYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RTHAX	ISHYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.09%	0.87%	+0.22%
Volatility (6M) Calculated over the trailing 6-month period	2.05%	1.71%	+0.34%
Volatility (1Y) Calculated over the trailing 1-year period	2.87%	2.30%	+0.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.12%	3.10%	+2.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.98%	3.33%	+1.65%

RTHAX vs. ISHYX - Expense Ratio Comparison

RTHAX has a 0.89% expense ratio, which is higher than ISHYX's 0.59% expense ratio.

Dividends

RTHAX vs. ISHYX - Dividend Comparison

RTHAX's dividend yield for the trailing twelve months is around 4.21%, less than ISHYX's 4.64% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
ISHYX Invesco Short Duration High Yield Municipal Fund	4.64%	4.65%	4.40%	3.38%	3.99%	3.58%	3.58%	3.45%	3.59%	3.51%	3.60%
RTHAX Russell Investments Tax-Exempt High Yield Bond Fund	4.21%	3.60%	4.02%	3.97%	3.64%	2.80%	3.10%	3.83%	3.86%	3.44%	4.06%

Frequently Asked Questions

Can I hold both RTHAX and ISHYX in my portfolio?

RTHAX and ISHYX have a correlation of 0.63, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RTHAX or ISHYX?

RTHAX has higher volatility (1.09%) compared to ISHYX (0.87%). In terms of maximum drawdown, RTHAX dropped -18.89% vs ISHYX's -13.64%.

Which has better risk-adjusted returns?

ISHYX currently has the higher Sharpe Ratio (3.05 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.