FINFX vs. SSSYX

Last updated Apr 1, 2026

Compare and contrast key facts about American Funds Fundamental Investors® Class F-2 (FINFX) and State Street Equity 500 Index Fund Class K (SSSYX).

FINFX is managed by American Funds. It was launched on Aug 1, 1978. SSSYX is a passively managed fund by State Street that tracks the performance of the S&P 500 Index. It was launched on Sep 17, 2014.

Performance

FINFX vs. SSSYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds Fundamental Investors® Class F-2 (FINFX) and State Street Equity 500 Index Fund Class K (SSSYX). The values are adjusted to include any dividend payments, if applicable.

FINFX vs. SSSYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FINFX American Funds Fundamental Investors® Class F-2	-6.09%	24.44%	22.98%	26.14%	-16.47%	22.68%	15.16%	27.34%	-7.96%	23.00%
SSSYX State Street Equity 500 Index Fund Class K	-7.05%	17.81%	24.99%	26.27%	-18.16%	28.51%	18.31%	31.38%	-4.38%	21.61%

Returns By Period

In the year-to-date period, FINFX achieves a -6.09% return, which is significantly higher than SSSYX's -7.05% return. Both investments have delivered pretty close results over the past 10 years, with FINFX having a 13.15% annualized return and SSSYX not far ahead at 13.69%.

FINFX

• 1D: -0.64%
• 1M: -9.88%
• YTD: -6.09%
• 6M: -2.00%
• 1Y: 20.68%
• 3Y*: 19.59%
• 5Y*: 11.80%
• 10Y*: 13.15%

SSSYX

• 1D: -0.39%
• 1M: -7.67%
• YTD: -7.05%
• 6M: -4.60%
• 1Y: 14.40%
• 3Y*: 17.15%
• 5Y*: 11.37%
• 10Y*: 13.69%

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

FINFX vs. SSSYX - Expense Ratio Comparison

FINFX has a 0.39% expense ratio, which is higher than SSSYX's 0.02% expense ratio.

FINFX

American Funds Fundamental Investors® Class F-2

SSSYX

State Street Equity 500 Index Fund Class K

Return for Risk

FINFX vs. SSSYX — Risk / Return Rank

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

FINFX

FINFX Risk / Return Rank: 71
FINFX Sharpe Ratio Rank: 67
FINFX Sortino Ratio Rank: 72
FINFX Omega Ratio Rank: 67
FINFX Calmar Ratio Rank: 71
FINFX Martin Ratio Rank: 76

SSSYX

SSSYX Risk / Return Rank: 46
SSSYX Sharpe Ratio Rank: 41
SSSYX Sortino Ratio Rank: 45
SSSYX Omega Ratio Rank: 50
SSSYX Calmar Ratio Rank: 42
SSSYX Martin Ratio Rank: 53

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.

FINFX vs. SSSYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds Fundamental Investors® Class F-2 (FINFX) and State Street Equity 500 Index Fund Class K (SSSYX). 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.

	FINFX	SSSYX	Difference
Sharpe ratio Return per unit of total volatility	1.17	0.84	+0.33
Sortino ratio Return per unit of downside risk	1.77	1.30	+0.47
Omega ratio Gain probability vs. loss probability	1.25	1.20	+0.05
Calmar ratio Return relative to maximum drawdown	1.62	1.06	+0.57
Martin ratio Return relative to average drawdown	7.29	5.13	+2.16
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FINFX vs. SSSYX - Sharpe Ratio Comparison

The current FINFX Sharpe Ratio is 1.17, which is higher than the SSSYX Sharpe Ratio of 0.84. The chart below compares the historical Sharpe Ratios of FINFX and SSSYX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	FINFX	SSSYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.17	0.84	+0.33
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.71	0.68	+0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.75	0.11	+0.64
Sharpe Ratio (All Time) Calculated using the full available price history	0.55	0.11	+0.45

Correlation

The correlation between FINFX and SSSYX is 0.96, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

FINFX vs. SSSYX - Dividend Comparison

FINFX's dividend yield for the trailing twelve months is around 9.32%, more than SSSYX's 1.55% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FINFX American Funds Fundamental Investors® Class F-2	9.32%	8.73%	9.11%	6.01%	5.21%	11.19%	2.81%	7.11%	9.54%	7.46%	4.91%	6.29%
SSSYX State Street Equity 500 Index Fund Class K	1.55%	1.44%	1.63%	1.78%	2.16%	2.76%	1.86%	4.44%	5.18%	5.94%	2.07%	1.84%

Drawdowns

FINFX vs. SSSYX - Drawdown Comparison

The maximum FINFX drawdown since its inception was -46.54%, smaller than the maximum SSSYX drawdown of -91.48%. Use the drawdown chart below to compare losses from any high point for FINFX and SSSYX.

Drawdown Indicators

	FINFX	SSSYX	Difference
Max Drawdown Largest peak-to-trough decline	-46.54%	-91.48%	+44.94%
Max Drawdown (1Y) Largest decline over 1 year	-11.36%	-12.10%	+0.74%
Max Drawdown (5Y) Largest decline over 5 years	-24.95%	-24.49%	-0.46%
Max Drawdown (10Y) Largest decline over 10 years	-33.91%	-91.48%	+57.57%
Current Drawdown Current decline from peak	-10.64%	-8.88%	-1.76%
Average Drawdown Average peak-to-trough decline	-6.04%	-4.20%	-1.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.53%	2.49%	+0.04%

Volatility

FINFX vs. SSSYX - Volatility Comparison

American Funds Fundamental Investors® Class F-2 (FINFX) has a higher volatility of 4.98% compared to State Street Equity 500 Index Fund Class K (SSSYX) at 4.24%. This indicates that FINFX's price experiences larger fluctuations and is considered to be riskier than SSSYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FINFX	SSSYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.98%	4.24%	+0.74%
Volatility (6M) Calculated over the trailing 6-month period	10.65%	9.08%	+1.57%
Volatility (1Y) Calculated over the trailing 1-year period	17.95%	18.10%	-0.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.67%	16.85%	-0.18%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.65%	124.43%	-106.78%