HIMYX vs. AMHIX

Last updated Jun 5, 2026

HIMYX (Pioneer High Income Municipal Fund) and AMHIX (American High-Income Municipal Bond Fund) are both High Yield Muni funds. Over the past 10 years, HIMYX returned 2.27%/yr vs 3.29%/yr for AMHIX. A 0.75 correlation means they provide meaningful diversification when combined. HIMYX charges 0.55%/yr vs 0.63%/yr for AMHIX.

Performance

HIMYX vs. AMHIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Pioneer High Income Municipal Fund (HIMYX) and American High-Income Municipal Bond Fund (AMHIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, HIMYX achieves a 1.70% return, which is significantly lower than AMHIX's 2.16% return. Over the past 10 years, HIMYX has underperformed AMHIX with an annualized return of 2.27%, while AMHIX has yielded a comparatively higher 3.29% annualized return.

HIMYX

• 1D: -0.18%
• 1M: 0.48%
• YTD: 1.70%
• 6M: 1.49%
• 1Y: 2.79%
• 3Y*: 2.91%
• 5Y*: -0.34%
• 10Y*: 2.27%

AMHIX

• 1D: -0.06%
• 1M: 0.84%
• YTD: 2.16%
• 6M: 2.64%
• 1Y: 8.02%
• 3Y*: 6.11%
• 5Y*: 1.71%
• 10Y*: 3.29%

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

HIMYX vs. AMHIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
HIMYX Pioneer High Income Municipal Fund	1.70%	-1.50%	6.07%	3.64%	-13.08%	6.69%	1.85%	9.56%	4.15%	8.33%
AMHIX American High-Income Municipal Bond Fund	2.16%	5.70%	6.19%	7.18%	-12.59%	5.28%	4.39%	8.88%	1.59%	8.89%

Correlation

The correlation between HIMYX and AMHIX 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	0.70
Correlation (5Y) Calculated over the trailing 5-year period	0.74
Correlation (10Y) Calculated over the trailing 10-year period	0.73
Correlation (All Time) Calculated using the full available price history since Oct 19, 2006	0.75

The correlation between HIMYX and AMHIX shifts across timeframes, from 0.63 (1 year) to 0.75 (all time), reflecting how their relationship changes across market environments.

Return for Risk

HIMYX vs. AMHIX — Risk / Return Rank

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

HIMYX

HIMYX Risk / Return Rank: 8
HIMYX Sharpe Ratio Rank: 7
HIMYX Sortino Ratio Rank: 8
HIMYX Omega Ratio Rank: 9
HIMYX Calmar Ratio Rank: 7
HIMYX Martin Ratio Rank: 7

AMHIX

AMHIX Risk / Return Rank: 76
AMHIX Sharpe Ratio Rank: 85
AMHIX Sortino Ratio Rank: 90
AMHIX Omega Ratio Rank: 90
AMHIX Calmar Ratio Rank: 62
AMHIX Martin Ratio Rank: 53

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.

HIMYX vs. AMHIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Pioneer High Income Municipal Fund (HIMYX) and American High-Income Municipal Bond Fund (AMHIX). 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.

	HIMYX	AMHIX	Difference
Sharpe ratio: Return per unit of total volatility	0.52	2.77	-2.25
Sortino ratio: Return per unit of downside risk	0.99	4.50	-3.50
Omega ratio: Gain probability vs. loss probability	1.13	1.67	-0.54
Calmar ratio: Return relative to maximum drawdown	0.67	3.02	-2.36
Martin ratio: Return relative to average drawdown	1.70	10.73	-9.03
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

HIMYX vs. AMHIX - Sharpe Ratio Comparison

The current HIMYX Sharpe Ratio is 0.52, which is lower than the AMHIX Sharpe Ratio of 2.77. The chart below compares the historical Sharpe Ratios of HIMYX and AMHIX, 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

	HIMYX	AMHIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.52	2.77	-2.25
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.06	0.35	-0.41
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	0.73	-0.28
Sharpe Ratio (All Time) Calculated using the full available price history	0.54	1.40	-0.86

Drawdowns

HIMYX vs. AMHIX - Drawdown Comparison

The maximum HIMYX drawdown since its inception was -35.00%, which is greater than AMHIX's maximum drawdown of -21.74%. Use the drawdown chart below to compare losses from any high point for HIMYX and AMHIX.

Drawdown Indicators

	HIMYX	AMHIX	Difference
Max Drawdown Largest peak-to-trough decline	-35.00%	-21.74%	-13.26%
Max Drawdown (1Y) Largest decline over 1 year	-4.22%	-2.76%	-1.46%
Max Drawdown (3Y) Largest decline over 3 years	-7.79%	-6.25%	-1.54%
Max Drawdown (5Y) Largest decline over 5 years	-19.32%	-17.81%	-1.51%
Max Drawdown (10Y) Largest decline over 10 years	-19.32%	-17.81%	-1.51%
Current Drawdown Current decline from peak	-4.29%	-0.08%	-4.21%
Average Drawdown Average peak-to-trough decline	-5.65%	-2.12%	-3.53%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.65%	0.78%	+0.87%

Volatility

HIMYX vs. AMHIX - Volatility Comparison

Pioneer High Income Municipal Fund (HIMYX) has a higher volatility of 1.54% compared to American High-Income Municipal Bond Fund (AMHIX) at 1.09%. This indicates that HIMYX's price experiences larger fluctuations and is considered to be riskier than AMHIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	HIMYX	AMHIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.54%	1.09%	+0.45%
Volatility (6M) Calculated over the trailing 6-month period	3.10%	2.18%	+0.92%
Volatility (1Y) Calculated over the trailing 1-year period	5.46%	3.02%	+2.44%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.68%	4.84%	+0.84%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.07%	4.53%	+0.54%

HIMYX vs. AMHIX - Expense Ratio Comparison

HIMYX has a 0.55% expense ratio, which is lower than AMHIX's 0.63% expense ratio.

Dividends

HIMYX vs. AMHIX - Dividend Comparison

HIMYX's dividend yield for the trailing twelve months is around 8.66%, more than AMHIX's 3.89% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMHIX American High-Income Municipal Bond Fund	3.89%	5.26%	3.80%	3.10%	2.53%	3.23%	3.40%	3.46%	3.67%	4.01%	3.55%	4.03%
HIMYX Pioneer High Income Municipal Fund	8.66%	8.63%	5.32%	4.97%	3.88%	3.71%	3.96%	5.35%	5.20%	5.00%	5.66%	5.65%

Frequently Asked Questions

Can I hold both HIMYX and AMHIX in my portfolio?

HIMYX and AMHIX 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, HIMYX or AMHIX?

HIMYX has higher volatility (1.54%) compared to AMHIX (1.09%). In terms of maximum drawdown, HIMYX dropped -35.00% vs AMHIX's -21.74%.

Which has better risk-adjusted returns?

AMHIX currently has the higher Sharpe Ratio (2.77 vs 0.52), 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.