ACTHX vs. ISHYX

Last updated Jun 4, 2026

ACTHX (Invesco High Yield Municipal Fund) and ISHYX (Invesco Short Duration High Yield Municipal Fund) are both High Yield Muni funds from Invesco. Over the past 10 years, ACTHX returned 2.79%/yr vs 2.86%/yr for ISHYX. Their correlation of 0.84 suggests significant overlap in exposure. ACTHX charges 1.39%/yr vs 0.59%/yr for ISHYX.

Performance

ACTHX vs. ISHYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco High Yield Municipal Fund (ACTHX) 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, ACTHX achieves a 2.64% return, which is significantly higher than ISHYX's 2.40% return. Both investments have delivered pretty close results over the past 10 years, with ACTHX having a 2.79% annualized return and ISHYX not far ahead at 2.86%.

ACTHX

• 1D: 0.12%
• 1M: 0.93%
• YTD: 2.64%
• 6M: 2.85%
• 1Y: 7.62%
• 3Y*: 4.73%
• 5Y*: 0.68%
• 10Y*: 2.79%

ISHYX

• 1D: 0.21%
• 1M: 0.71%
• YTD: 2.40%
• 6M: 3.01%
• 1Y: 7.06%
• 3Y*: 4.92%
• 5Y*: 1.74%
• 10Y*: 2.86%

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

ACTHX vs. ISHYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACTHX Invesco High Yield Municipal Fund	2.64%	4.38%	5.54%	4.34%	-13.94%	6.29%	3.25%	10.12%	1.44%	9.10%
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 ACTHX and ISHYX is 0.82, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (10Y) Calculated over the trailing 10-year period	0.84
Correlation (All Time) Calculated using the full available price history since Jan 5, 2016	0.84

The correlation between ACTHX and ISHYX has been stable across timeframes, ranging from 0.82 to 0.88 - a consistent structural relationship.

Return for Risk

ACTHX vs. ISHYX — Risk / Return Rank

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

ACTHX

ACTHX Risk / Return Rank: 54
ACTHX Sharpe Ratio Rank: 48
ACTHX Sortino Ratio Rank: 64
ACTHX Omega Ratio Rank: 74
ACTHX Calmar Ratio Rank: 46
ACTHX Martin Ratio Rank: 38

ISHYX

ISHYX Risk / Return Rank: 88
ISHYX Sharpe Ratio Rank: 92
ISHYX Sortino Ratio Rank: 97
ISHYX Omega Ratio Rank: 96
ISHYX Calmar Ratio Rank: 82
ISHYX Martin Ratio Rank: 75

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.

ACTHX vs. ISHYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco High Yield Municipal Fund (ACTHX) 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.

	ACTHX	ISHYX	Difference
Sharpe ratio: Return per unit of total volatility	2.03	3.10	-1.08
Sortino ratio: Return per unit of downside risk	3.35	5.70	-2.35
Omega ratio: Gain probability vs. loss probability	1.48	1.87	-0.38
Calmar ratio: Return relative to maximum drawdown	2.58	3.77	-1.19
Martin ratio: Return relative to average drawdown	8.38	14.18	-5.79
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ACTHX vs. ISHYX - Sharpe Ratio Comparison

The current ACTHX Sharpe Ratio is 2.03, which is lower than the ISHYX Sharpe Ratio of 3.10. The chart below compares the historical Sharpe Ratios of ACTHX 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

	ACTHX	ISHYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.03	3.10	-1.08
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.12	0.56	-0.45
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.52	0.86	-0.34
Sharpe Ratio (All Time) Calculated using the full available price history	1.10	0.95	+0.15

Drawdowns

ACTHX vs. ISHYX - Drawdown Comparison

The maximum ACTHX drawdown since its inception was -27.29%, which is greater than ISHYX's maximum drawdown of -13.64%. Use the drawdown chart below to compare losses from any high point for ACTHX and ISHYX.

Drawdown Indicators

	ACTHX	ISHYX	Difference
Max Drawdown Largest peak-to-trough decline	-27.29%	-13.64%	-13.65%
Max Drawdown (1Y) Largest decline over 1 year	-2.98%	-1.89%	-1.09%
Max Drawdown (3Y) Largest decline over 3 years	-10.13%	-4.03%	-6.10%
Max Drawdown (5Y) Largest decline over 5 years	-19.83%	-12.03%	-7.80%
Max Drawdown (10Y) Largest decline over 10 years	-19.83%	-13.64%	-6.19%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-3.55%	-2.64%	-0.91%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.92%	0.50%	+0.42%

Volatility

ACTHX vs. ISHYX - Volatility Comparison

Invesco High Yield Municipal Fund (ACTHX) has a higher volatility of 1.40% compared to Invesco Short Duration High Yield Municipal Fund (ISHYX) at 0.87%. This indicates that ACTHX'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

	ACTHX	ISHYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.40%	0.87%	+0.53%
Volatility (6M) Calculated over the trailing 6-month period	2.73%	1.75%	+0.98%
Volatility (1Y) Calculated over the trailing 1-year period	3.83%	2.31%	+1.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.72%	3.10%	+2.62%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.39%	3.33%	+2.06%

ACTHX vs. ISHYX - Expense Ratio Comparison

ACTHX has a 1.39% expense ratio, which is higher than ISHYX's 0.59% expense ratio.

Dividends

ACTHX vs. ISHYX - Dividend Comparison

ACTHX's dividend yield for the trailing twelve months is around 5.34%, more than ISHYX's 4.64% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACTHX Invesco High Yield Municipal Fund	5.34%	7.14%	5.64%	4.22%	4.72%	3.95%	4.33%	4.70%	4.78%	4.71%	5.11%	4.93%
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%	0.00%

Frequently Asked Questions

Can I hold both ACTHX and ISHYX in my portfolio?

ACTHX and ISHYX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ACTHX or ISHYX?

ACTHX has higher volatility (1.40%) compared to ISHYX (0.87%). In terms of maximum drawdown, ACTHX dropped -27.29% vs ISHYX's -13.64%.

Which has better risk-adjusted returns?

ISHYX currently has the higher Sharpe Ratio (3.10 vs 2.03), 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.