MAMTX vs. ATOIX
MAMTX (Blackrock Strategic Municipal Opportunities Fund Of Blackrock Municipal Series Trust) and ATOIX (abrdn Ultra Short Municipal Income Fund) are both Municipal Bonds funds. Over the past 10 years, MAMTX returned 1.89%/yr vs 1.82%/yr for ATOIX. Their 0.21 correlation means their historical movements had little consistent relationship. MAMTX charges 0.55%/yr vs 0.44%/yr for ATOIX.
Performance
MAMTX vs. ATOIX - Performance Comparison
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Returns By Period
In the year-to-date period, MAMTX achieves a 1.12% return, which is significantly lower than ATOIX's 1.46% return. Both investments have delivered pretty close results over the past 10 years, with MAMTX having a 1.89% annualized return and ATOIX not far behind at 1.82%.
MAMTX
- 1D
- -0.29%
- 1M
- -2.00%
- 6M
- 0.58%
- YTD
- 1.12%
- 1Y
- 5.95%
- 3Y*
- 4.16%
- 5Y*
- 0.22%
- 10Y*
- 1.89%
- ALL TIME*
- 4.27%
ATOIX
- 1D
- 0.22%
- 1M
- 0.22%
- 6M
- 1.20%
- YTD
- 1.46%
- 1Y
- 2.99%
- 3Y*
- 3.02%
- 5Y*
- 2.39%
- 10Y*
- 1.82%
- ALL TIME*
- 1.89%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
MAMTX vs. ATOIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MAMTX Blackrock Strategic Municipal Opportunities Fund Of Blackrock Municipal Series Trust | 1.12% | 3.97% | 3.90% | 4.89% | -12.11% | 5.84% | 0.58% | 6.81% | 1.27% | 8.05% |
ATOIX abrdn Ultra Short Municipal Income Fund | 1.46% | 3.33% | 3.14% | 3.27% | 0.87% | -0.04% | 0.88% | 1.40% | 1.54% | 2.24% |
Correlation
The correlation between MAMTX and ATOIX is 0.20, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.20 |
Correlation (3Y) Balances recent behavior with more history. | 0.25 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.25 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.25 |
Correlation (All Time) Calculated using the full available price history since Dec 19, 2002 | 0.21 |
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Return for Risk
MAMTX vs. ATOIX — Risk / Return Rank
MAMTX
ATOIX
MAMTX vs. ATOIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Blackrock Strategic Municipal Opportunities Fund Of Blackrock Municipal Series Trust (MAMTX) and abrdn Ultra Short Municipal Income Fund (ATOIX). 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.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| MAMTX | ATOIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.44 | ||
| Sortino ratioReturn per unit of downside risk | -15.07 | ||
| Omega ratioGain probability vs. loss probability | 1.52 | 11.67 | -10.16 |
| Calmar ratioReturn relative to maximum drawdown | 2.41 | 32.63 | -30.22 |
| Martin ratioReturn relative to average drawdown | 8.41 | 96.00 | -87.59 |
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Drawdowns
MAMTX vs. ATOIX - Drawdown Comparison
The maximum MAMTX drawdown since its inception was -16.83%, which is greater than ATOIX's maximum drawdown of -1.46%. Use the drawdown chart below to compare losses from any high point for MAMTX and ATOIX.
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Drawdown Indicators
| MAMTX | ATOIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -16.83% | -1.46% | -15.37% |
Max Drawdown (1Y)Largest decline over 1 year | -2.85% | -0.10% | -2.75% |
Max Drawdown (3Y)Largest decline over 3 years | -5.71% | -0.10% | -5.61% |
Max Drawdown (5Y)Largest decline over 5 years | -16.83% | -0.37% | -16.46% |
Max Drawdown (10Y)Largest decline over 10 years | -16.83% | -0.43% | -16.40% |
Current DrawdownCurrent decline from peak | -2.09% | 0.00% | -2.09% |
Average DrawdownAverage peak-to-trough decline | -2.05% | -0.06% | -1.99% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.82% | 0.03% | +0.79% |
Volatility
MAMTX vs. ATOIX - Volatility Comparison
Blackrock Strategic Municipal Opportunities Fund Of Blackrock Municipal Series Trust (MAMTX) has a higher volatility of 0.91% compared to abrdn Ultra Short Municipal Income Fund (ATOIX) at 0.22%. This indicates that MAMTX's price experiences larger fluctuations and is considered to be riskier than ATOIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MAMTX | ATOIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.91% | 0.22% | +0.69% |
Volatility (6M)Calculated over the trailing 6-month period | 2.44% | 0.59% | +1.85% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.11% | 0.89% | +2.22% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.79% | 0.84% | +3.95% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.85% | 0.79% | +4.06% |
MAMTX vs. ATOIX - Expense Ratio Comparison
MAMTX has a 0.55% expense ratio, which is higher than ATOIX's 0.44% expense ratio.
Dividends
MAMTX vs. ATOIX - Dividend Comparison
MAMTX's dividend yield for the trailing twelve months is around 3.64%, more than ATOIX's 2.94% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ATOIX abrdn Ultra Short Municipal Income Fund | 2.94% | 3.27% | 3.09% | 3.02% | 1.07% | 0.06% | 0.88% | 1.39% | 1.42% | 2.20% | 0.61% | 0.52% |
MAMTX Blackrock Strategic Municipal Opportunities Fund Of Blackrock Municipal Series Trust | 3.64% | 5.00% | 4.23% | 2.70% | 1.96% | 2.00% | 2.39% | 2.83% | 4.74% | 2.89% | 3.91% | 2.84% |
Frequently Asked Questions
MAMTX and ATOIX have a correlation of 0.20, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
MAMTX has higher volatility (0.91%) compared to ATOIX (0.22%). In terms of maximum drawdown, MAMTX dropped -16.83% vs ATOIX's -1.46%.
ATOIX currently has the higher Sharpe Ratio (3.65 vs 2.21), 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.
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