WSHFX vs. AMFFX

Last updated Jun 4, 2026

WSHFX (American Funds Washington Mutual Investors Fund Class F-1) and AMFFX (American Mutual Fund Class F-1) are both mutual funds - WSHFX is a Large Cap Blend Equities fund managed by American Funds, while AMFFX is a Large Cap Value Equities fund actively managed by American Funds. Over the past 10 years, WSHFX returned 12.76%/yr vs 11.19%/yr for AMFFX. With a 0.98 correlation, they move nearly in lockstep. Both charge a 0.64% expense ratio.

Performance

WSHFX vs. AMFFX - Performance Comparison

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

Returns By Period

In the year-to-date period, WSHFX achieves a 5.86% return, which is significantly lower than AMFFX's 6.63% return. Over the past 10 years, WSHFX has outperformed AMFFX with an annualized return of 12.76%, while AMFFX has yielded a comparatively lower 11.19% annualized return.

WSHFX

• 1D: 0.40%
• 1M: 2.80%
• YTD: 5.86%
• 6M: 5.98%
• 1Y: 17.49%
• 3Y*: 18.18%
• 5Y*: 11.85%
• 10Y*: 12.76%

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%

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

WSHFX vs. AMFFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WSHFX American Funds Washington Mutual Investors Fund Class F-1	5.86%	17.13%	18.94%	17.15%	-8.50%	28.36%	7.62%	24.82%	-6.27%	19.91%
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%

Correlation

The correlation between WSHFX and AMFFX 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 16, 2001	0.98

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

Return for Risk

WSHFX vs. AMFFX — Risk / Return Rank

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

WSHFX

WSHFX Risk / Return Rank: 38
WSHFX Sharpe Ratio Rank: 37
WSHFX Sortino Ratio Rank: 37
WSHFX Omega Ratio Rank: 37
WSHFX Calmar Ratio Rank: 33
WSHFX Martin Ratio Rank: 44

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

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.

WSHFX vs. AMFFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds Washington Mutual Investors Fund Class F-1 (WSHFX) and American Mutual Fund Class F-1 (AMFFX). 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.

	WSHFX	AMFFX	Difference
Sharpe ratio: Return per unit of total volatility	1.77	1.87	-0.11
Sortino ratio: Return per unit of downside risk	2.52	2.63	-0.11
Omega ratio: Gain probability vs. loss probability	1.32	1.34	-0.02
Calmar ratio: Return relative to maximum drawdown	2.17	2.24	-0.07
Martin ratio: Return relative to average drawdown	9.40	9.01	+0.39
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WSHFX vs. AMFFX - Sharpe Ratio Comparison

The current WSHFX Sharpe Ratio is 1.77, which is comparable to the AMFFX Sharpe Ratio of 1.87. The chart below compares the historical Sharpe Ratios of WSHFX and AMFFX, 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

	WSHFX	AMFFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.77	1.87	-0.11
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.84	0.83	+0.02
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.78	0.80	-0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	0.56	-0.06

Drawdowns

WSHFX vs. AMFFX - Drawdown Comparison

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

Drawdown Indicators

	WSHFX	AMFFX	Difference
Max Drawdown Largest peak-to-trough decline	-53.94%	-48.76%	-5.18%
Max Drawdown (1Y) Largest decline over 1 year	-8.38%	-7.93%	-0.45%
Max Drawdown (3Y) Largest decline over 3 years	-14.65%	-12.95%	-1.70%
Max Drawdown (5Y) Largest decline over 5 years	-18.69%	-15.32%	-3.37%
Max Drawdown (10Y) Largest decline over 10 years	-34.67%	-29.83%	-4.84%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-7.34%	-5.73%	-1.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.94%	1.97%	-0.03%

Volatility

WSHFX vs. AMFFX - Volatility Comparison

American Funds Washington Mutual Investors Fund Class F-1 (WSHFX) and American Mutual Fund Class F-1 (AMFFX) have volatilities of 2.42% and 2.35%, 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

	WSHFX	AMFFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.42%	2.35%	+0.07%
Volatility (6M) Calculated over the trailing 6-month period	7.89%	7.35%	+0.54%
Volatility (1Y) Calculated over the trailing 1-year period	10.31%	9.50%	+0.81%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.11%	12.50%	+1.61%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.33%	14.12%	+2.21%

WSHFX vs. AMFFX - Expense Ratio Comparison

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

Dividends

WSHFX vs. AMFFX - Dividend Comparison

WSHFX's dividend yield for the trailing twelve months is around 9.55%, more than AMFFX's 7.09% 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%
WSHFX American Funds Washington Mutual Investors Fund Class F-1	9.55%	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 WSHFX and AMFFX in my portfolio?

With a correlation of 0.94, WSHFX and AMFFX 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, WSHFX or AMFFX?

WSHFX has higher volatility (2.42%) compared to AMFFX (2.35%). In terms of maximum drawdown, WSHFX dropped -53.94% vs AMFFX's -48.76%.

Which has better risk-adjusted returns?

AMFFX currently has the higher Sharpe Ratio (1.87 vs 1.77), 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.