FLMB vs. AMUN
FLMB (Franklin Liberty Federal Tax-Free Bond ETF) and AMUN (abrdn Ultra Short Municipal Income Active ETF) are both Municipal Bonds funds. Both are actively managed. At a 0.25 correlation, their price movements are largely independent. FLMB charges 0.30%/yr vs 0.25%/yr for AMUN.
Performance
FLMB vs. AMUN - Performance Comparison
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Returns By Period
In the year-to-date period, FLMB achieves a 2.16% return, which is significantly higher than AMUN's 1.25% return.
FLMB
- 1D
- -0.04%
- 1M
- 1.71%
- YTD
- 2.16%
- 6M
- 2.42%
- 1Y
- 8.35%
- 3Y*
- 4.12%
- 5Y*
- 0.68%
- 10Y*
- —
AMUN
- 1D
- 0.04%
- 1M
- 0.30%
- YTD
- 1.25%
- 6M
- 1.32%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
FLMB vs. AMUN - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
FLMB Franklin Liberty Federal Tax-Free Bond ETF | 2.16% | 0.62% |
AMUN abrdn Ultra Short Municipal Income Active ETF | 1.25% | 0.14% |
Correlation
The correlation between FLMB and AMUN is 0.25, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Oct 20, 2025 | 0.25 |
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Return for Risk
FLMB vs. AMUN — Risk / Return Rank
FLMB
AMUN
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
FLMB vs. AMUN - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Franklin Liberty Federal Tax-Free Bond ETF (FLMB) and abrdn Ultra Short Municipal Income Active ETF (AMUN). 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.
| FLMB | AMUN | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | 1.51 | — | — |
| Calmar ratioReturn relative to maximum drawdown | 2.58 | — | — |
| Martin ratioReturn relative to average drawdown | 9.13 | — | — |
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Drawdowns
FLMB vs. AMUN - Drawdown Comparison
The maximum FLMB drawdown since its inception was -17.90%, which is greater than AMUN's maximum drawdown of -0.61%. Use the drawdown chart below to compare losses from any high point for FLMB and AMUN.
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Drawdown Indicators
| FLMB | AMUN | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.90% | -0.61% | -17.29% |
Max Drawdown (1Y)Largest decline over 1 year | -3.25% | — | — |
Max Drawdown (3Y)Largest decline over 3 years | -7.33% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -17.90% | — | — |
Current DrawdownCurrent decline from peak | -0.19% | 0.00% | -0.19% |
Average DrawdownAverage peak-to-trough decline | -4.14% | -0.08% | -4.06% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.92% | — | — |
Volatility
FLMB vs. AMUN - Volatility Comparison
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Volatility by Period
| FLMB | AMUN | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.82% | — | — |
Volatility (6M)Calculated over the trailing 6-month period | 2.48% | — | — |
Volatility (1Y)Calculated over the trailing 1-year period | 3.53% | 0.98% | +2.55% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.11% | 0.98% | +4.13% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.56% | 0.98% | +4.58% |
FLMB vs. AMUN - Expense Ratio Comparison
FLMB has a 0.30% expense ratio, which is higher than AMUN's 0.25% expense ratio.
Dividends
FLMB vs. AMUN - Dividend Comparison
FLMB's dividend yield for the trailing twelve months is around 3.74%, more than AMUN's 1.88% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
AMUN abrdn Ultra Short Municipal Income Active ETF | 1.88% | 0.66% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
FLMB Franklin Liberty Federal Tax-Free Bond ETF | 3.74% | 3.86% | 3.79% | 3.49% | 2.80% | 1.66% | 2.07% | 2.40% | 2.68% | 0.54% |
Frequently Asked Questions
FLMB and AMUN have a correlation of 0.25, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, AMUN is cheaper at 0.25% per year. The better choice depends on whether you care most about return, fees, risk, or income.
AMUN is cheaper with a 0.25% expense ratio, compared with 0.30% for FLMB.
FLMB has the higher dividend yield at 3.74%, compared with 1.88% for AMUN.
They also come from different issuers: Franklin Templeton and abrdn. Their fees differ too: 0.30% for FLMB and 0.25% for AMUN.
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