AMHIX vs. GFFFX

Last updated Jun 4, 2026

AMHIX (American High-Income Municipal Bond Fund) and GFFFX (American Funds The Growth Fund of America) are both mutual funds - AMHIX is a High Yield Muni fund managed by American Funds, while GFFFX is a Large Cap Growth Equities fund managed by American Funds. Over the past 10 years, AMHIX returned 3.29%/yr vs 16.22%/yr for GFFFX. At a correlation of -0.06, they often move in opposite directions. AMHIX charges 0.63%/yr vs 0.40%/yr for GFFFX.

Performance

AMHIX vs. GFFFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American High-Income Municipal Bond Fund (AMHIX) and American Funds The Growth Fund of America (GFFFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AMHIX achieves a 2.23% return, which is significantly lower than GFFFX's 10.19% return. Over the past 10 years, AMHIX has underperformed GFFFX with an annualized return of 3.29%, while GFFFX has yielded a comparatively higher 16.22% annualized return.

AMHIX

• 1D: 0.19%
• 1M: 0.97%
• YTD: 2.23%
• 6M: 2.71%
• 1Y: 8.39%
• 3Y*: 6.13%
• 5Y*: 1.74%
• 10Y*: 3.29%

GFFFX

• 1D: -0.32%
• 1M: 6.84%
• YTD: 10.19%
• 6M: 9.81%
• 1Y: 26.45%
• 3Y*: 25.40%
• 5Y*: 12.74%
• 10Y*: 16.22%

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

AMHIX vs. GFFFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AMHIX American High-Income Municipal Bond Fund	2.23%	5.70%	6.19%	7.18%	-12.59%	5.28%	4.39%	8.88%	1.59%	8.89%
GFFFX American Funds The Growth Fund of America	10.19%	19.96%	28.28%	37.51%	-30.61%	19.55%	38.16%	28.43%	-2.96%	26.38%

Correlation

The correlation between AMHIX and GFFFX is 0.13, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.13
Correlation (3Y) Calculated over the trailing 3-year period	0.13
Correlation (5Y) Calculated over the trailing 5-year period	0.12
Correlation (10Y) Calculated over the trailing 10-year period	0.04
Correlation (All Time) Calculated using the full available price history since Jan 5, 2009	-0.06

The correlation between AMHIX and GFFFX shifts across timeframes, from -0.06 (all time) to 0.13 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

AMHIX vs. GFFFX — Risk / Return Rank

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

AMHIX

AMHIX Risk / Return Rank: 76
AMHIX Sharpe Ratio Rank: 85
AMHIX Sortino Ratio Rank: 91
AMHIX Omega Ratio Rank: 91
AMHIX Calmar Ratio Rank: 62
AMHIX Martin Ratio Rank: 52

GFFFX

GFFFX Risk / Return Rank: 34
GFFFX Sharpe Ratio Rank: 38
GFFFX Sortino Ratio Rank: 35
GFFFX Omega Ratio Rank: 36
GFFFX Calmar Ratio Rank: 28
GFFFX Martin Ratio Rank: 34

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.

AMHIX vs. GFFFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American High-Income Municipal Bond Fund (AMHIX) and American Funds The Growth Fund of America (GFFFX). 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.

	AMHIX	GFFFX	Difference
Sharpe ratio: Return per unit of total volatility	2.77	1.79	+0.98
Sortino ratio: Return per unit of downside risk	4.49	2.45	+2.04
Omega ratio: Gain probability vs. loss probability	1.67	1.32	+0.35
Calmar ratio: Return relative to maximum drawdown	3.02	1.97	+1.05
Martin ratio: Return relative to average drawdown	10.73	7.70	+3.02
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AMHIX vs. GFFFX - Sharpe Ratio Comparison

The current AMHIX Sharpe Ratio is 2.77, which is higher than the GFFFX Sharpe Ratio of 1.79. The chart below compares the historical Sharpe Ratios of AMHIX and GFFFX, 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

	AMHIX	GFFFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.77	1.79	+0.98
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.36	0.63	-0.27
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.73	0.83	-0.10
Sharpe Ratio (All Time) Calculated using the full available price history	1.40	0.81	+0.60

Drawdowns

AMHIX vs. GFFFX - Drawdown Comparison

The maximum AMHIX drawdown since its inception was -21.74%, smaller than the maximum GFFFX drawdown of -36.26%. Use the drawdown chart below to compare losses from any high point for AMHIX and GFFFX.

Drawdown Indicators

	AMHIX	GFFFX	Difference
Max Drawdown Largest peak-to-trough decline	-21.74%	-36.26%	+14.52%
Max Drawdown (1Y) Largest decline over 1 year	-2.76%	-13.74%	+10.98%
Max Drawdown (3Y) Largest decline over 3 years	-6.25%	-21.55%	+15.30%
Max Drawdown (5Y) Largest decline over 5 years	-17.81%	-36.26%	+18.45%
Max Drawdown (10Y) Largest decline over 10 years	-17.81%	-36.26%	+18.45%
Current Drawdown Current decline from peak	-0.02%	-0.32%	+0.30%
Average Drawdown Average peak-to-trough decline	-2.12%	-5.57%	+3.45%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.78%	3.51%	-2.73%

Volatility

AMHIX vs. GFFFX - Volatility Comparison

The current volatility for American High-Income Municipal Bond Fund (AMHIX) is 1.10%, while American Funds The Growth Fund of America (GFFFX) has a volatility of 3.67%. This indicates that AMHIX experiences smaller price fluctuations and is considered to be less risky than GFFFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AMHIX	GFFFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.10%	3.67%	-2.57%
Volatility (6M) Calculated over the trailing 6-month period	2.20%	11.66%	-9.46%
Volatility (1Y) Calculated over the trailing 1-year period	3.03%	15.16%	-12.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.84%	20.25%	-15.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.53%	19.69%	-15.16%

AMHIX vs. GFFFX - Expense Ratio Comparison

AMHIX has a 0.63% expense ratio, which is higher than GFFFX's 0.40% expense ratio.

Dividends

AMHIX vs. GFFFX - Dividend Comparison

AMHIX's dividend yield for the trailing twelve months is around 3.88%, less than GFFFX's 9.94% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMHIX American High-Income Municipal Bond Fund	3.88%	5.26%	3.80%	3.10%	2.53%	3.23%	3.40%	3.46%	3.67%	4.01%	3.55%	4.03%
GFFFX American Funds The Growth Fund of America	9.94%	10.95%	9.23%	7.64%	4.32%	8.42%	4.51%	7.38%	12.29%	7.27%	6.87%	9.13%

Frequently Asked Questions

Can I hold both AMHIX and GFFFX in my portfolio?

AMHIX and GFFFX have a correlation of 0.13, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AMHIX or GFFFX?

GFFFX has higher volatility (3.67%) compared to AMHIX (1.10%). In terms of maximum drawdown, AMHIX dropped -21.74% vs GFFFX's -36.26%.

Which has better risk-adjusted returns?

AMHIX currently has the higher Sharpe Ratio (2.77 vs 1.79), 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.