PMOAX vs. AHYMX

Last updated Jun 4, 2026

PMOAX (Principal Opportunistic Municipal Fund) and AHYMX (abrdn Short Duration High Yield Municipal Fund) are both High Yield Muni funds. Over the past 10 years, PMOAX returned 2.49%/yr vs 1.56%/yr for AHYMX. A 0.70 correlation means they provide meaningful diversification when combined. PMOAX charges 0.84%/yr vs 0.68%/yr for AHYMX.

Performance

PMOAX vs. AHYMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Principal Opportunistic Municipal Fund (PMOAX) and abrdn Short Duration High Yield Municipal Fund (AHYMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PMOAX achieves a 2.30% return, which is significantly higher than AHYMX's 1.18% return. Over the past 10 years, PMOAX has outperformed AHYMX with an annualized return of 2.49%, while AHYMX has yielded a comparatively lower 1.56% annualized return.

PMOAX

• 1D: 0.21%
• 1M: 1.23%
• YTD: 2.30%
• 6M: 2.60%
• 1Y: 7.73%
• 3Y*: 4.62%
• 5Y*: -0.04%
• 10Y*: 2.49%

AHYMX

• 1D: 0.22%
• 1M: 0.10%
• YTD: 1.18%
• 6M: 1.75%
• 1Y: 5.37%
• 3Y*: 2.97%
• 5Y*: 0.23%
• 10Y*: 1.56%

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

PMOAX vs. AHYMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PMOAX Principal Opportunistic Municipal Fund	2.30%	2.91%	4.40%	6.76%	-16.56%	6.38%	4.40%	10.55%	1.34%	10.14%
AHYMX abrdn Short Duration High Yield Municipal Fund	1.18%	2.91%	4.07%	1.56%	-9.36%	4.06%	1.81%	5.23%	1.50%	4.19%

Correlation

The correlation between PMOAX and AHYMX is 0.73, 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	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.77
Correlation (5Y) Calculated over the trailing 5-year period	0.79
Correlation (10Y) Calculated over the trailing 10-year period	0.74
Correlation (All Time) Calculated using the full available price history since Jan 3, 2014	0.70

The correlation between PMOAX and AHYMX has been stable across timeframes, ranging from 0.70 to 0.79 - a consistent structural relationship.

Return for Risk

PMOAX vs. AHYMX — Risk / Return Rank

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

PMOAX

PMOAX Risk / Return Rank: 62
PMOAX Sharpe Ratio Rank: 61
PMOAX Sortino Ratio Rank: 79
PMOAX Omega Ratio Rank: 83
PMOAX Calmar Ratio Rank: 49
PMOAX Martin Ratio Rank: 39

AHYMX

AHYMX Risk / Return Rank: 56
AHYMX Sharpe Ratio Rank: 48
AHYMX Sortino Ratio Rank: 62
AHYMX Omega Ratio Rank: 71
AHYMX Calmar Ratio Rank: 51
AHYMX Martin Ratio Rank: 47

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.

PMOAX vs. AHYMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal Opportunistic Municipal Fund (PMOAX) and abrdn Short Duration High Yield Municipal Fund (AHYMX). 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.

	PMOAX	AHYMX	Difference
Sharpe ratio: Return per unit of total volatility	2.31	2.03	+0.28
Sortino ratio: Return per unit of downside risk	3.81	3.32	+0.49
Omega ratio: Gain probability vs. loss probability	1.56	1.47	+0.09
Calmar ratio: Return relative to maximum drawdown	2.67	2.72	-0.05
Martin ratio: Return relative to average drawdown	8.41	9.73	-1.32
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PMOAX vs. AHYMX - Sharpe Ratio Comparison

The current PMOAX Sharpe Ratio is 2.31, which is comparable to the AHYMX Sharpe Ratio of 2.03. The chart below compares the historical Sharpe Ratios of PMOAX and AHYMX, 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

	PMOAX	AHYMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.31	2.03	+0.28
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.01	0.08	-0.09
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.49	0.60	-0.11
Sharpe Ratio (All Time) Calculated using the full available price history	0.75	0.96	-0.21

Drawdowns

PMOAX vs. AHYMX - Drawdown Comparison

The maximum PMOAX drawdown since its inception was -21.33%, which is greater than AHYMX's maximum drawdown of -11.53%. Use the drawdown chart below to compare losses from any high point for PMOAX and AHYMX.

Drawdown Indicators

	PMOAX	AHYMX	Difference
Max Drawdown Largest peak-to-trough decline	-21.33%	-11.53%	-9.80%
Max Drawdown (1Y) Largest decline over 1 year	-2.91%	-1.98%	-0.93%
Max Drawdown (3Y) Largest decline over 3 years	-6.41%	-4.53%	-1.88%
Max Drawdown (5Y) Largest decline over 5 years	-21.33%	-11.53%	-9.80%
Max Drawdown (10Y) Largest decline over 10 years	-21.33%	-11.53%	-9.80%
Current Drawdown Current decline from peak	-2.31%	-0.42%	-1.89%
Average Drawdown Average peak-to-trough decline	-4.79%	-2.49%	-2.30%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.92%	0.55%	+0.37%

Volatility

PMOAX vs. AHYMX - Volatility Comparison

Principal Opportunistic Municipal Fund (PMOAX) and abrdn Short Duration High Yield Municipal Fund (AHYMX) have volatilities of 1.16% and 1.15%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PMOAX	AHYMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.16%	1.15%	+0.01%
Volatility (6M) Calculated over the trailing 6-month period	2.29%	1.94%	+0.35%
Volatility (1Y) Calculated over the trailing 1-year period	3.38%	2.68%	+0.70%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.76%	2.93%	+1.83%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.06%	2.61%	+2.45%

PMOAX vs. AHYMX - Expense Ratio Comparison

PMOAX has a 0.84% expense ratio, which is higher than AHYMX's 0.68% expense ratio.

Dividends

PMOAX vs. AHYMX - Dividend Comparison

PMOAX's dividend yield for the trailing twelve months is around 4.51%, less than AHYMX's 4.56% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AHYMX abrdn Short Duration High Yield Municipal Fund	4.56%	4.52%	3.32%	2.21%	2.05%	2.31%	2.74%	3.10%	3.39%	2.82%	3.28%	3.43%
PMOAX Principal Opportunistic Municipal Fund	4.51%	4.59%	4.32%	3.42%	3.36%	3.09%	3.28%	3.48%	3.89%	3.62%	3.57%	3.73%

Frequently Asked Questions

Can I hold both PMOAX and AHYMX in my portfolio?

PMOAX and AHYMX have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PMOAX or AHYMX?

PMOAX has higher volatility (1.16%) compared to AHYMX (1.15%). In terms of maximum drawdown, PMOAX dropped -21.33% vs AHYMX's -11.53%.

Which has better risk-adjusted returns?

PMOAX currently has the higher Sharpe Ratio (2.31 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.