AMFFX vs. IGAAX

Last updated Jun 4, 2026

AMFFX (American Mutual Fund Class F-1) and IGAAX (American Funds International Growth and Income Fund Class A) are both mutual funds - AMFFX is a Large Cap Value Equities fund actively managed by American Funds, while IGAAX is a Foreign Large Cap Equities fund managed by American Funds. Over the past 10 years, AMFFX returned 11.19%/yr vs 9.62%/yr for IGAAX. A 0.78 correlation means they provide meaningful diversification when combined. AMFFX charges 0.64%/yr vs 0.91%/yr for IGAAX.

Performance

AMFFX vs. IGAAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Mutual Fund Class F-1 (AMFFX) and American Funds International Growth and Income Fund Class A (IGAAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AMFFX achieves a 6.63% return, which is significantly lower than IGAAX's 13.39% return. Over the past 10 years, AMFFX has outperformed IGAAX with an annualized return of 11.19%, while IGAAX has yielded a comparatively lower 9.62% annualized return.

AMFFX

• 1D: 0.62%
• 1M: 2.95%
• YTD: 6.63%
• 6M: 6.84%
• 1Y: 17.19%
• 3Y*: 15.42%
• 5Y*: 10.29%
• 10Y*: 11.19%

IGAAX

• 1D: 0.60%
• 1M: 4.84%
• YTD: 13.39%
• 6M: 16.07%
• 1Y: 30.27%
• 3Y*: 19.26%
• 5Y*: 8.63%
• 10Y*: 9.62%

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

AMFFX vs. IGAAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AMFFX American Mutual Fund Class F-1	6.63%	15.99%	14.87%	9.36%	-4.54%	25.04%	4.73%	21.48%	-2.37%	17.44%
IGAAX American Funds International Growth and Income Fund Class A	13.39%	35.09%	3.28%	15.25%	-15.47%	9.80%	7.78%	27.11%	-14.38%	26.08%

Correlation

The correlation between AMFFX and IGAAX is 0.70, 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	0.70
Correlation (3Y) Calculated over the trailing 3-year period	0.67
Correlation (5Y) Calculated over the trailing 5-year period	0.72
Correlation (10Y) Calculated over the trailing 10-year period	0.72
Correlation (All Time) Calculated using the full available price history since Oct 2, 2008	0.78

The correlation between AMFFX and IGAAX shifts across timeframes, from 0.67 (3 years) to 0.78 (all time), reflecting how their relationship changes across market environments.

Return for Risk

AMFFX vs. IGAAX — Risk / Return Rank

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

AMFFX

AMFFX Risk / Return Rank: 40
AMFFX Sharpe Ratio Rank: 41
AMFFX Sortino Ratio Rank: 39
AMFFX Omega Ratio Rank: 40
AMFFX Calmar Ratio Rank: 35
AMFFX Martin Ratio Rank: 42

IGAAX

IGAAX Risk / Return Rank: 56
IGAAX Sharpe Ratio Rank: 60
IGAAX Sortino Ratio Rank: 58
IGAAX Omega Ratio Rank: 59
IGAAX Calmar Ratio Rank: 51
IGAAX Martin Ratio Rank: 50

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.

AMFFX vs. IGAAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Mutual Fund Class F-1 (AMFFX) and American Funds International Growth and Income Fund Class A (IGAAX). 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.

	AMFFX	IGAAX	Difference
Sharpe ratio: Return per unit of total volatility	1.87	2.28	-0.41
Sortino ratio: Return per unit of downside risk	2.63	3.21	-0.59
Omega ratio: Gain probability vs. loss probability	1.34	1.43	-0.09
Calmar ratio: Return relative to maximum drawdown	2.24	2.74	-0.50
Martin ratio: Return relative to average drawdown	9.01	10.33	-1.32
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AMFFX vs. IGAAX - Sharpe Ratio Comparison

The current AMFFX Sharpe Ratio is 1.87, which is comparable to the IGAAX Sharpe Ratio of 2.28. The chart below compares the historical Sharpe Ratios of AMFFX and IGAAX, 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

	AMFFX	IGAAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.87	2.28	-0.41
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.83	0.59	+0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.80	0.61	+0.19
Sharpe Ratio (All Time) Calculated using the full available price history	0.56	0.47	+0.09

Drawdowns

AMFFX vs. IGAAX - Drawdown Comparison

The maximum AMFFX drawdown since its inception was -48.76%, which is greater than IGAAX's maximum drawdown of -35.79%. Use the drawdown chart below to compare losses from any high point for AMFFX and IGAAX.

Drawdown Indicators

	AMFFX	IGAAX	Difference
Max Drawdown Largest peak-to-trough decline	-48.76%	-35.79%	-12.97%
Max Drawdown (1Y) Largest decline over 1 year	-7.93%	-10.92%	+2.99%
Max Drawdown (3Y) Largest decline over 3 years	-12.95%	-12.60%	-0.35%
Max Drawdown (5Y) Largest decline over 5 years	-15.32%	-30.57%	+15.25%
Max Drawdown (10Y) Largest decline over 10 years	-29.83%	-35.79%	+5.96%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-5.73%	-7.90%	+2.17%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.97%	2.89%	-0.92%

Volatility

AMFFX vs. IGAAX - Volatility Comparison

The current volatility for American Mutual Fund Class F-1 (AMFFX) is 2.35%, while American Funds International Growth and Income Fund Class A (IGAAX) has a volatility of 4.79%. This indicates that AMFFX experiences smaller price fluctuations and is considered to be less risky than IGAAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AMFFX	IGAAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.35%	4.79%	-2.44%
Volatility (6M) Calculated over the trailing 6-month period	7.35%	11.04%	-3.69%
Volatility (1Y) Calculated over the trailing 1-year period	9.50%	13.12%	-3.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	12.50%	14.61%	-2.11%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.12%	15.91%	-1.79%

AMFFX vs. IGAAX - Expense Ratio Comparison

AMFFX has a 0.64% expense ratio, which is lower than IGAAX's 0.91% expense ratio.

Dividends

AMFFX vs. IGAAX - Dividend Comparison

AMFFX's dividend yield for the trailing twelve months is around 7.09%, less than IGAAX's 7.27% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMFFX American Mutual Fund Class F-1	7.09%	7.53%	6.26%	3.72%	4.84%	4.73%	1.95%	4.56%	6.38%	5.89%	4.78%	6.48%
IGAAX American Funds International Growth and Income Fund Class A	7.27%	8.14%	3.37%	2.29%	4.00%	6.91%	1.37%	2.40%	2.81%	1.85%	2.35%	3.25%

Frequently Asked Questions

Can I hold both AMFFX and IGAAX in my portfolio?

AMFFX and IGAAX have a correlation of 0.70, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AMFFX or IGAAX?

IGAAX has higher volatility (4.79%) compared to AMFFX (2.35%). In terms of maximum drawdown, AMFFX dropped -48.76% vs IGAAX's -35.79%.

Which has better risk-adjusted returns?

IGAAX currently has the higher Sharpe Ratio (2.28 vs 1.87), 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.