PWZ vs. MFLX

Last updated Jun 3, 2026

PWZ (Invesco California AMT-Free Municipal Bond ETF) and MFLX (First Trust Flexible Municipal High Income ETF) are both Municipal Bonds funds. PWZ is passively managed, while MFLX is actively managed. Over the past 5 years, PWZ returned 0.17%/yr vs -0.01%/yr for MFLX. At a 0.29 correlation, their price movements are largely independent. PWZ charges 0.28%/yr vs 0.88%/yr for MFLX.

Performance

PWZ vs. MFLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco California AMT-Free Municipal Bond ETF (PWZ) and First Trust Flexible Municipal High Income ETF (MFLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PWZ achieves a 2.53% return, which is significantly lower than MFLX's 3.39% return.

PWZ

• 1D: 0.25%
• 1M: 0.99%
• YTD: 2.53%
• 6M: 2.73%
• 1Y: 8.84%
• 3Y*: 3.24%
• 5Y*: 0.17%
• 10Y*: 1.91%

MFLX

• 1D: 0.12%
• 1M: 1.48%
• YTD: 3.39%
• 6M: 3.96%
• 1Y: 9.15%
• 3Y*: 5.50%
• 5Y*: -0.01%
• 10Y*: —

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

PWZ vs. MFLX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PWZ Invesco California AMT-Free Municipal Bond ETF	2.53%	1.26%	2.16%	6.55%	-11.35%	1.94%	4.90%	8.72%	0.32%	6.82%
MFLX First Trust Flexible Municipal High Income ETF	3.39%	3.94%	3.74%	8.98%	-19.94%	8.43%	7.19%	16.89%	-4.66%	5.57%

Correlation

The correlation between PWZ and MFLX is 0.56, 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	0.56
Correlation (3Y) Calculated over the trailing 3-year period	0.31
Correlation (5Y) Calculated over the trailing 5-year period	0.33
Correlation (All Time) Calculated using the full available price history since Sep 30, 2016	0.29

Over the past year, PWZ and MFLX have become more correlated (0.56) than their long-term average of 0.29, meaning their price movements have been converging.

PWZ vs. MFLX - Sectors Allocation Comparison

Sectors	PWZ	MFLX
Financial Services	6.9%	15.2%
Basic Materials	-	-
Communication Services	-	-
Consumer Cyclical	-	-
Consumer Defensive	-	-
Energy	-	-
Healthcare	-	-
Industrials	-	-
Real Estate	-	-
Technology	-	-
Utilities	-	-

Return for Risk

PWZ vs. MFLX — Risk / Return Rank

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

PWZ

PWZ Risk / Return Rank: 58
PWZ Sharpe Ratio Rank: 60
PWZ Sortino Ratio Rank: 66
PWZ Omega Ratio Rank: 69
PWZ Calmar Ratio Rank: 47
PWZ Martin Ratio Rank: 50

MFLX

MFLX Risk / Return Rank: 68
MFLX Sharpe Ratio Rank: 67
MFLX Sortino Ratio Rank: 75
MFLX Omega Ratio Rank: 79
MFLX Calmar Ratio Rank: 57
MFLX Martin Ratio Rank: 63

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.

PWZ vs. MFLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco California AMT-Free Municipal Bond ETF (PWZ) and First Trust Flexible Municipal High Income ETF (MFLX). 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.

	PWZ	MFLX	Difference
Sharpe ratio Return per unit of total volatility	2.04	2.25	-0.21
Sortino ratio Return per unit of downside risk	3.08	3.44	-0.36
Omega ratio Gain probability vs. loss probability	1.42	1.49	-0.07
Calmar ratio Return relative to maximum drawdown	2.36	2.87	-0.51
Martin ratio Return relative to average drawdown	8.55	11.58	-3.03
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PWZ vs. MFLX - Sharpe Ratio Comparison

The current PWZ Sharpe Ratio is 2.04, which is comparable to the MFLX Sharpe Ratio of 2.25. The chart below compares the historical Sharpe Ratios of PWZ and MFLX, 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

	PWZ	MFLX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.04	2.25	-0.21
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.03	-0.00	+0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.32	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.46	0.19	+0.27

Drawdowns

PWZ vs. MFLX - Drawdown Comparison

The maximum PWZ drawdown since its inception was -21.49%, smaller than the maximum MFLX drawdown of -26.76%. Use the drawdown chart below to compare losses from any high point for PWZ and MFLX.

Drawdown Indicators

	PWZ	MFLX	Difference
Max Drawdown Largest peak-to-trough decline	-21.49%	-26.76%	+5.27%
Max Drawdown (1Y) Largest decline over 1 year	-3.47%	-3.11%	-0.36%
Max Drawdown (3Y) Largest decline over 3 years	-9.09%	-8.18%	-0.91%
Max Drawdown (5Y) Largest decline over 5 years	-17.56%	-25.88%	+8.32%
Max Drawdown (10Y) Largest decline over 10 years	-17.56%	—	—
Current Drawdown Current decline from peak	-0.48%	-3.72%	+3.24%
Average Drawdown Average peak-to-trough decline	-3.54%	-8.17%	+4.63%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.96%	0.77%	+0.19%

Volatility

PWZ vs. MFLX - Volatility Comparison

Invesco California AMT-Free Municipal Bond ETF (PWZ) and First Trust Flexible Municipal High Income ETF (MFLX) have volatilities of 1.39% and 1.41%, 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

	PWZ	MFLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.39%	1.41%	-0.02%
Volatility (6M) Calculated over the trailing 6-month period	3.04%	3.00%	+0.04%
Volatility (1Y) Calculated over the trailing 1-year period	4.39%	4.09%	+0.30%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.25%	10.36%	-4.11%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.89%	11.29%	-5.40%

PWZ vs. MFLX - Expense Ratio Comparison

PWZ has a 0.28% expense ratio, which is lower than MFLX's 0.88% expense ratio.

Dividends

PWZ vs. MFLX - Dividend Comparison

PWZ's dividend yield for the trailing twelve months is around 3.57%, less than MFLX's 4.07% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MFLX First Trust Flexible Municipal High Income ETF	4.07%	4.06%	3.81%	3.65%	4.27%	3.69%	3.21%	2.94%	3.74%	3.80%	0.98%	0.00%
PWZ Invesco California AMT-Free Municipal Bond ETF	3.57%	3.41%	3.28%	2.84%	2.49%	2.28%	2.34%	2.51%	2.53%	2.48%	2.86%	3.16%

Frequently Asked Questions

Can I hold both PWZ and MFLX in my portfolio?

PWZ and MFLX have a correlation of 0.56, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PWZ or MFLX?

MFLX has higher volatility (1.41%) compared to PWZ (1.39%). In terms of maximum drawdown, PWZ dropped -21.49% vs MFLX's -26.76%.

Which ETF is better, PWZ or MFLX?

On 5-year performance, PWZ leads with 0.17% vs -0.01% for MFLX. On fees, PWZ is cheaper at 0.28% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, PWZ or MFLX?

Over the 5-year period, PWZ has performed better with a 0.17% return vs -0.01%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, PWZ or MFLX?

PWZ is cheaper with a 0.28% expense ratio, compared with 0.88% for MFLX.

Which ETF pays a higher dividend yield, PWZ or MFLX?

MFLX has the higher dividend yield at 4.07%, compared with 3.57% for PWZ.

What is the main difference between PWZ and MFLX?

They also come from different issuers: Invesco and First Trust. Their fees differ too: 0.28% for PWZ and 0.88% for MFLX.

Which has better risk-adjusted returns?

MFLX currently has the higher Sharpe Ratio (2.25 vs 2.04), 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.