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MFLX vs. SUB
Performance
Risk-Adjusted Performance
Dividends
Drawdowns
Volatility

Correlation

The correlation between MFLX and SUB is 0.26, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.


-0.50.00.51.00.3

Performance

MFLX vs. SUB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in First Trust Flexible Municipal High Income ETF (MFLX) and iShares Short-Term National Muni Bond ETF (SUB). The values are adjusted to include any dividend payments, if applicable.

-3.00%-2.00%-1.00%0.00%1.00%2.00%SeptemberOctoberNovemberDecember2025February
1.09%
1.29%
MFLX
SUB

Key characteristics

Sharpe Ratio

MFLX:

0.59

SUB:

2.20

Sortino Ratio

MFLX:

0.87

SUB:

3.30

Omega Ratio

MFLX:

1.15

SUB:

1.45

Calmar Ratio

MFLX:

0.36

SUB:

3.44

Martin Ratio

MFLX:

3.93

SUB:

10.54

Ulcer Index

MFLX:

1.43%

SUB:

0.30%

Daily Std Dev

MFLX:

9.62%

SUB:

1.45%

Max Drawdown

MFLX:

-26.76%

SUB:

-9.46%

Current Drawdown

MFLX:

-9.18%

SUB:

0.00%

Returns By Period

In the year-to-date period, MFLX achieves a 1.33% return, which is significantly higher than SUB's 0.71% return.


MFLX

YTD

1.33%

1M

1.70%

6M

1.09%

1Y

5.25%

5Y*

0.49%

10Y*

N/A

SUB

YTD

0.71%

1M

0.61%

6M

1.29%

1Y

3.05%

5Y*

1.09%

10Y*

1.23%

*Annualized

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.


MFLX vs. SUB - Expense Ratio Comparison

MFLX has a 0.88% expense ratio, which is higher than SUB's 0.07% expense ratio.


MFLX
First Trust Flexible Municipal High Income ETF
Expense ratio chart for MFLX: current value at 0.88% compared with the broader market ranging from 0.00% to 2.12%.0.50%1.00%1.50%2.00%0.88%
Expense ratio chart for SUB: current value at 0.07% compared with the broader market ranging from 0.00% to 2.12%.0.50%1.00%1.50%2.00%0.07%

Risk-Adjusted Performance

MFLX vs. SUB — Risk-Adjusted Performance Rank

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

MFLX
The Risk-Adjusted Performance Rank of MFLX is 2828
Overall Rank
The Sharpe Ratio Rank of MFLX is 2323
Sharpe Ratio Rank
The Sortino Ratio Rank of MFLX is 2222
Sortino Ratio Rank
The Omega Ratio Rank of MFLX is 3131
Omega Ratio Rank
The Calmar Ratio Rank of MFLX is 2121
Calmar Ratio Rank
The Martin Ratio Rank of MFLX is 4444
Martin Ratio Rank

SUB
The Risk-Adjusted Performance Rank of SUB is 8888
Overall Rank
The Sharpe Ratio Rank of SUB is 8989
Sharpe Ratio Rank
The Sortino Ratio Rank of SUB is 9191
Sortino Ratio Rank
The Omega Ratio Rank of SUB is 9191
Omega Ratio Rank
The Calmar Ratio Rank of SUB is 8989
Calmar Ratio Rank
The Martin Ratio Rank of SUB is 7979
Martin Ratio Rank
The risk-adjusted ranks indicate the investment's position relative to the market. A rank closer to 100 signifies top-performing investments, while a rank closer to 0 might suggest underperformance, based on the selected ratio. The values are calculated based on the past 12 months of returns.

MFLX vs. SUB - Risk-Adjusted Performance Comparison

This table presents a comparison of risk-adjusted performance metrics for First Trust Flexible Municipal High Income ETF (MFLX) and iShares Short-Term National Muni Bond ETF (SUB). 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.


Sharpe ratio
The chart of Sharpe ratio for MFLX, currently valued at 0.59, compared to the broader market0.002.004.000.592.20
The chart of Sortino ratio for MFLX, currently valued at 0.87, compared to the broader market-2.000.002.004.006.008.0010.0012.000.873.30
The chart of Omega ratio for MFLX, currently valued at 1.15, compared to the broader market0.501.001.502.002.503.001.151.45
The chart of Calmar ratio for MFLX, currently valued at 0.36, compared to the broader market0.005.0010.0015.000.363.44
The chart of Martin ratio for MFLX, currently valued at 3.93, compared to the broader market0.0020.0040.0060.0080.00100.003.9310.54
MFLX
SUB

The current MFLX Sharpe Ratio is 0.59, which is lower than the SUB Sharpe Ratio of 2.20. The chart below compares the historical Sharpe Ratios of MFLX and SUB, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.


Rolling 12-month Sharpe Ratio0.001.002.003.004.00SeptemberOctoberNovemberDecember2025February
0.59
2.20
MFLX
SUB

Dividends

MFLX vs. SUB - Dividend Comparison

MFLX's dividend yield for the trailing twelve months is around 3.88%, more than SUB's 2.11% yield.


TTM20242023202220212020201920182017201620152014
MFLX
First Trust Flexible Municipal High Income ETF
3.88%3.82%3.65%4.29%3.72%3.22%2.97%3.74%3.81%0.98%0.00%0.00%
SUB
iShares Short-Term National Muni Bond ETF
2.11%2.10%1.73%0.86%0.72%1.23%1.59%1.32%0.94%0.75%0.77%0.76%

Drawdowns

MFLX vs. SUB - Drawdown Comparison

The maximum MFLX drawdown since its inception was -26.76%, which is greater than SUB's maximum drawdown of -9.46%. Use the drawdown chart below to compare losses from any high point for MFLX and SUB. For additional features, visit the drawdowns tool.


-12.00%-10.00%-8.00%-6.00%-4.00%-2.00%0.00%SeptemberOctoberNovemberDecember2025February
-9.18%
0
MFLX
SUB

Volatility

MFLX vs. SUB - Volatility Comparison

First Trust Flexible Municipal High Income ETF (MFLX) has a higher volatility of 1.98% compared to iShares Short-Term National Muni Bond ETF (SUB) at 0.30%. This indicates that MFLX's price experiences larger fluctuations and is considered to be riskier than SUB based on this measure. The chart below showcases a comparison of their rolling one-month volatility.


0.00%2.00%4.00%6.00%8.00%SeptemberOctoberNovemberDecember2025February
1.98%
0.30%
MFLX
SUB
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Disclaimer

The information contained herein does not constitute investment advice and made available for educational purposes only. Prices and returns on equities are listed without consideration of fees, commissions, taxes, penalties, or interest payable due to purchasing, holding, or selling.

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