AMFFX vs. WSHFX

Last updated Jun 23, 2026

AMFFX (American Mutual Fund Class F-1) and WSHFX (American Funds Washington Mutual Investors Fund Class F-1) are both mutual funds - AMFFX is a Large Cap Value Equities fund actively managed by American Funds, while WSHFX is a Large Cap Blend Equities fund managed by American Funds. Over the past 10 years, AMFFX returned 11.19%/yr vs 12.78%/yr for WSHFX. With a 0.98 correlation, they move nearly in lockstep. Both charge a 0.64% expense ratio.

Performance

AMFFX vs. WSHFX - 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 Washington Mutual Investors Fund Class F-1 (WSHFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AMFFX achieves a 6.82% return, which is significantly higher than WSHFX's 5.91% return. Over the past 10 years, AMFFX has underperformed WSHFX with an annualized return of 11.19%, while WSHFX has yielded a comparatively higher 12.78% annualized return.

AMFFX

• 1D: 0.48%
• 1M: 0.48%
• YTD: 6.82%
• 6M: 6.55%
• 1Y: 17.36%
• 3Y*: 14.74%
• 5Y*: 10.88%
• 10Y*: 11.19%

WSHFX

• 1D: 0.46%
• 1M: 0.68%
• YTD: 5.91%
• 6M: 5.48%
• 1Y: 17.73%
• 3Y*: 17.29%
• 5Y*: 12.53%
• 10Y*: 12.78%

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

AMFFX vs. WSHFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AMFFX American Mutual Fund Class F-1	6.82%	15.99%	14.87%	9.36%	-4.54%	25.04%	4.73%	21.48%	-2.37%	17.44%
WSHFX American Funds Washington Mutual Investors Fund Class F-1	5.91%	17.13%	18.94%	17.15%	-8.50%	28.36%	7.62%	24.82%	-6.27%	19.91%

Correlation

The correlation between AMFFX and WSHFX is 0.94, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.94
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (10Y) Calculated over the trailing 10-year period	0.96
Correlation (All Time) Calculated using the full available price history since Mar 15, 2001	0.98

The correlation between AMFFX and WSHFX has been stable across timeframes, ranging from 0.94 to 0.98 - a consistent structural relationship.

Return for Risk

AMFFX vs. WSHFX — Risk / Return Rank

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

AMFFX

AMFFX Risk / Return Rank: 42
AMFFX Sharpe Ratio Rank: 44
AMFFX Sortino Ratio Rank: 42
AMFFX Omega Ratio Rank: 42
AMFFX Calmar Ratio Rank: 37
AMFFX Martin Ratio Rank: 43

WSHFX

WSHFX Risk / Return Rank: 39
WSHFX Sharpe Ratio Rank: 39
WSHFX Sortino Ratio Rank: 38
WSHFX Omega Ratio Rank: 38
WSHFX Calmar Ratio Rank: 35
WSHFX Martin Ratio Rank: 46

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. WSHFX - 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 Washington Mutual Investors Fund Class F-1 (WSHFX). 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.

	AMFFX	WSHFX	Difference
Sharpe ratio: Return per unit of total volatility	1.79	1.68	+0.11
Sortino ratio: Return per unit of downside risk	2.51	2.40	+0.11
Omega ratio: Gain probability vs. loss probability	1.32	1.30	+0.02
Calmar ratio: Return relative to maximum drawdown	2.19	2.11	+0.08
Martin ratio: Return relative to average drawdown	8.79	9.11	-0.32

AMFFX vs. WSHFX - Sharpe Ratio Comparison

The current AMFFX Sharpe Ratio is 1.79, which is comparable to the WSHFX Sharpe Ratio of 1.68. The chart below compares the historical Sharpe Ratios of AMFFX and WSHFX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

AMFFX vs. WSHFX - Drawdown Comparison

The maximum AMFFX drawdown since its inception was -48.76%, smaller than the maximum WSHFX drawdown of -53.94%. Use the drawdown chart below to compare losses from any high point for AMFFX and WSHFX.

Drawdown Indicators

	AMFFX	WSHFX	Difference
Max Drawdown Largest peak-to-trough decline	-48.76%	-53.94%	+5.18%
Max Drawdown (1Y) Largest decline over 1 year	-7.93%	-8.38%	+0.45%
Max Drawdown (3Y) Largest decline over 3 years	-12.95%	-14.65%	+1.70%
Max Drawdown (5Y) Largest decline over 5 years	-15.32%	-18.69%	+3.37%
Max Drawdown (10Y) Largest decline over 10 years	-29.83%	-34.67%	+4.84%
Current Drawdown Current decline from peak	-0.63%	-0.58%	-0.05%
Average Drawdown Average peak-to-trough decline	-5.72%	-7.32%	+1.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.97%	1.94%	+0.03%

Volatility

AMFFX vs. WSHFX - Volatility Comparison

The current volatility for American Mutual Fund Class F-1 (AMFFX) is 2.79%, while American Funds Washington Mutual Investors Fund Class F-1 (WSHFX) has a volatility of 2.96%. This indicates that AMFFX experiences smaller price fluctuations and is considered to be less risky than WSHFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AMFFX	WSHFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.79%	2.96%	-0.17%
Volatility (6M) Calculated over the trailing 6-month period	7.50%	8.07%	-0.57%
Volatility (1Y) Calculated over the trailing 1-year period	9.70%	10.52%	-0.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	12.52%	14.12%	-1.60%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.13%	16.34%	-2.21%

AMFFX vs. WSHFX - Expense Ratio Comparison

Both AMFFX and WSHFX have an expense ratio of 0.64%.

Dividends

AMFFX vs. WSHFX - Dividend Comparison

AMFFX's dividend yield for the trailing twelve months is around 7.10%, less than WSHFX's 9.76% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMFFX American Mutual Fund Class F-1	7.10%	7.53%	6.26%	3.72%	4.84%	4.73%	1.95%	4.56%	6.38%	5.89%	4.78%	6.48%
WSHFX American Funds Washington Mutual Investors Fund Class F-1	9.76%	10.08%	10.05%	6.11%	6.28%	6.01%	3.02%	6.17%	4.28%	7.19%	6.32%	6.18%

Frequently Asked Questions

Can I hold both AMFFX and WSHFX in my portfolio?

With a correlation of 0.94, AMFFX and WSHFX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, AMFFX or WSHFX?

WSHFX has higher volatility (2.96%) compared to AMFFX (2.79%). In terms of maximum drawdown, AMFFX dropped -48.76% vs WSHFX's -53.94%.

Which has better risk-adjusted returns?

AMFFX currently has the higher Sharpe Ratio (1.79 vs 1.68), 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.