WMFFX vs. FINFX

Last updated Jun 4, 2026

WMFFX (Washington Mutual Investors Fund Class F-2) and FINFX (American Funds Fundamental Investors® Class F-2) are both mutual funds - WMFFX is a Large Cap Value Equities fund tracking the S&P 500, while FINFX is a Large Cap Blend Equities fund managed by American Funds. Over the past 10 years, WMFFX returned 13.00%/yr vs 15.13%/yr for FINFX. Their correlation of 0.95 suggests significant overlap in exposure. WMFFX charges 0.37%/yr vs 0.39%/yr for FINFX.

Performance

WMFFX vs. FINFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Washington Mutual Investors Fund Class F-2 (WMFFX) and American Funds Fundamental Investors® Class F-2 (FINFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WMFFX achieves a 5.96% return, which is significantly lower than FINFX's 15.23% return. Over the past 10 years, WMFFX has underperformed FINFX with an annualized return of 13.00%, while FINFX has yielded a comparatively higher 15.13% annualized return.

WMFFX

• 1D: 0.39%
• 1M: 2.81%
• YTD: 5.96%
• 6M: 6.10%
• 1Y: 17.77%
• 3Y*: 18.31%
• 5Y*: 12.04%
• 10Y*: 13.00%

FINFX

• 1D: 0.01%
• 1M: 5.92%
• YTD: 15.23%
• 6M: 16.26%
• 1Y: 34.80%
• 3Y*: 26.35%
• 5Y*: 15.15%
• 10Y*: 15.13%

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

WMFFX vs. FINFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WMFFX Washington Mutual Investors Fund Class F-2	5.96%	17.42%	19.24%	16.96%	-8.27%	28.71%	7.89%	25.03%	-5.98%	20.23%
FINFX American Funds Fundamental Investors® Class F-2	15.23%	24.44%	22.98%	26.14%	-16.47%	22.68%	15.16%	27.34%	-7.96%	23.00%

Correlation

The correlation between WMFFX and FINFX is 0.87, 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	0.87
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Aug 4, 2008	0.95

The correlation between WMFFX and FINFX has been stable across timeframes, ranging from 0.87 to 0.95 - a consistent structural relationship.

Return for Risk

WMFFX vs. FINFX — Risk / Return Rank

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

WMFFX

WMFFX Risk / Return Rank: 39
WMFFX Sharpe Ratio Rank: 39
WMFFX Sortino Ratio Rank: 37
WMFFX Omega Ratio Rank: 38
WMFFX Calmar Ratio Rank: 34
WMFFX Martin Ratio Rank: 46

FINFX

FINFX Risk / Return Rank: 75
FINFX Sharpe Ratio Rank: 80
FINFX Sortino Ratio Rank: 70
FINFX Omega Ratio Rank: 70
FINFX Calmar Ratio Rank: 74
FINFX Martin Ratio Rank: 83

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.

WMFFX vs. FINFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Washington Mutual Investors Fund Class F-2 (WMFFX) and American Funds Fundamental Investors® Class F-2 (FINFX). 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.

	WMFFX	FINFX	Difference
Sharpe ratio: Return per unit of total volatility	1.80	2.60	-0.81
Sortino ratio: Return per unit of downside risk	2.56	3.49	-0.93
Omega ratio: Gain probability vs. loss probability	1.33	1.47	-0.14
Calmar ratio: Return relative to maximum drawdown	2.21	3.36	-1.15
Martin ratio: Return relative to average drawdown	9.58	15.58	-6.00
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WMFFX vs. FINFX - Sharpe Ratio Comparison

The current WMFFX Sharpe Ratio is 1.80, which is lower than the FINFX Sharpe Ratio of 2.60. The chart below compares the historical Sharpe Ratios of WMFFX and FINFX, 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

	WMFFX	FINFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.80	2.60	-0.81
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.86	0.91	-0.05
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.80	0.86	-0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.60	0.61	-0.01

Drawdowns

WMFFX vs. FINFX - Drawdown Comparison

The maximum WMFFX drawdown since its inception was -47.21%, roughly equal to the maximum FINFX drawdown of -46.54%. Use the drawdown chart below to compare losses from any high point for WMFFX and FINFX.

Drawdown Indicators

	WMFFX	FINFX	Difference
Max Drawdown Largest peak-to-trough decline	-47.21%	-46.54%	-0.67%
Max Drawdown (1Y) Largest decline over 1 year	-8.36%	-10.64%	+2.28%
Max Drawdown (3Y) Largest decline over 3 years	-14.64%	-17.94%	+3.30%
Max Drawdown (5Y) Largest decline over 5 years	-18.53%	-24.95%	+6.42%
Max Drawdown (10Y) Largest decline over 10 years	-34.63%	-33.91%	-0.72%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-5.36%	-5.99%	+0.63%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.93%	2.29%	-0.36%

Volatility

WMFFX vs. FINFX - Volatility Comparison

The current volatility for Washington Mutual Investors Fund Class F-2 (WMFFX) is 2.42%, while American Funds Fundamental Investors® Class F-2 (FINFX) has a volatility of 3.69%. This indicates that WMFFX experiences smaller price fluctuations and is considered to be less risky than FINFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WMFFX	FINFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.42%	3.69%	-1.27%
Volatility (6M) Calculated over the trailing 6-month period	7.89%	10.83%	-2.94%
Volatility (1Y) Calculated over the trailing 1-year period	10.32%	13.76%	-3.44%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.11%	16.80%	-2.69%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.33%	17.73%	-1.40%

WMFFX vs. FINFX - Expense Ratio Comparison

WMFFX has a 0.37% expense ratio, which is lower than FINFX's 0.39% expense ratio.

Dividends

WMFFX vs. FINFX - Dividend Comparison

WMFFX's dividend yield for the trailing twelve months is around 9.74%, more than FINFX's 7.59% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FINFX American Funds Fundamental Investors® Class F-2	7.59%	8.73%	9.11%	6.01%	5.21%	11.19%	2.81%	7.11%	9.54%	7.46%	4.91%	6.29%
WMFFX Washington Mutual Investors Fund Class F-2	9.74%	10.28%	10.27%	5.92%	6.53%	6.24%	3.26%	6.33%	4.59%	7.43%	6.56%	6.44%

Frequently Asked Questions

Can I hold both WMFFX and FINFX in my portfolio?

WMFFX and FINFX have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, WMFFX or FINFX?

FINFX has higher volatility (3.69%) compared to WMFFX (2.42%). In terms of maximum drawdown, WMFFX dropped -47.21% vs FINFX's -46.54%.

Which has better risk-adjusted returns?

FINFX currently has the higher Sharpe Ratio (2.60 vs 1.80), 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.