SFLNX vs. RIDAX

Last updated Aug 4, 2026

SFLNX (Schwab Fundamental US Large Company Index Fund) and RIDAX (The Income Fund of America Class R-1) are both Large Cap Value Equities funds. SFLNX is passively managed, while RIDAX is actively managed. Over the past 10 years, SFLNX returned 14.26%/yr vs 7.52%/yr for RIDAX. Their correlation of 0.92 means they have usually moved in the same direction. SFLNX charges 0.25%/yr vs 1.36%/yr for RIDAX.

Performance

SFLNX vs. RIDAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Schwab Fundamental US Large Company Index Fund (SFLNX) and The Income Fund of America Class R-1 (RIDAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SFLNX achieves a 17.46% return, which is significantly higher than RIDAX's 7.84% return. Over the past 10 years, SFLNX has outperformed RIDAX with an annualized return of 14.26%, while RIDAX has yielded a comparatively lower 7.52% annualized return.

SFLNX

• 1D: 0.08%
• 1M: 1.35%
• 6M: 11.71%
• YTD: 17.46%
• 1Y: 32.23%
• 3Y*: 18.96%
• 5Y*: 13.78%
• 10Y*: 14.26%
• ALL TIME*: 11.25%

RIDAX

• 1D: -0.11%
• 1M: 1.06%
• 6M: 3.95%
• YTD: 7.84%
• 1Y: 15.25%
• 3Y*: 12.30%
• 5Y*: 7.38%
• 10Y*: 7.52%
• ALL TIME*: 8.27%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
RIDAX The Income Fund of America Class R-1	$0.00	$0.00	$0.00
SFLNX Schwab Fundamental US Large Company Index Fund	$0.00	$0.00	$0.00

SFLNX vs. RIDAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SFLNX Schwab Fundamental US Large Company Index Fund	17.46%	17.02%	16.78%	18.16%	-6.89%	31.64%	9.12%	28.91%	-7.43%	17.08%
RIDAX The Income Fund of America Class R-1	7.84%	16.83%	9.49%	6.16%	-7.14%	16.47%	3.68%	17.57%	-6.06%	11.86%

Correlation

The correlation between SFLNX and RIDAX is 0.82, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.82
Correlation (3Y) Balances recent behavior with more history.	0.88
Correlation (5Y) Shows whether the relationship held over a longer period.	0.90
Correlation (10Y) Provides a long-term view across more market conditions.	0.90
Correlation (All Time) Calculated using the full available price history since Jan 2, 2008	0.92

The correlation between SFLNX and RIDAX has been stable across timeframes, ranging from 0.82 to 0.92 - a consistent structural relationship.

Return for Risk

SFLNX vs. RIDAX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

SFLNX

SFLNX Risk / Return Rank: 96
SFLNX Sharpe Ratio Rank: 97
SFLNX Sortino Ratio Rank: 96
SFLNX Omega Ratio Rank: 93
SFLNX Calmar Ratio Rank: 97
SFLNX Martin Ratio Rank: 97

RIDAX

RIDAX Risk / Return Rank: 76
RIDAX Sharpe Ratio Rank: 83
RIDAX Sortino Ratio Rank: 82
RIDAX Omega Ratio Rank: 79
RIDAX Calmar Ratio Rank: 72
RIDAX Martin Ratio Rank: 64

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

SFLNX vs. RIDAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Schwab Fundamental US Large Company Index Fund (SFLNX) and The Income Fund of America Class R-1 (RIDAX). 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.

	SFLNX	RIDAX	Difference
Sharpe ratio: Return per unit of total volatility	2.93	2.04	+0.88
Sortino ratio: Return per unit of downside risk	4.04	2.92	+1.12
Omega ratio: Gain probability vs. loss probability	1.54	1.37	+0.17
Calmar ratio: Return relative to maximum drawdown	5.01	2.44	+2.57
Martin ratio: Return relative to average drawdown	20.10	8.70	+11.40

SFLNX vs. RIDAX - Sharpe Ratio Comparison

The current SFLNX Sharpe Ratio is 2.93, which is higher than the RIDAX Sharpe Ratio of 2.04. The chart below compares the historical Sharpe Ratios of SFLNX and RIDAX, 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

SFLNX vs. RIDAX - Drawdown Comparison

The maximum SFLNX drawdown since its inception was -56.18%, which is greater than RIDAX's maximum drawdown of -42.37%. Use the drawdown chart below to compare losses from any high point for SFLNX and RIDAX.

Drawdown Indicators

	SFLNX	RIDAX	Difference
Max Drawdown Largest peak-to-trough decline	-56.18%	-42.37%	-13.81%
Max Drawdown (1Y) Largest decline over 1 year	-6.10%	-6.13%	+0.03%
Max Drawdown (3Y) Largest decline over 3 years	-16.27%	-8.71%	-7.56%
Max Drawdown (5Y) Largest decline over 5 years	-18.98%	-16.28%	-2.70%
Max Drawdown (10Y) Largest decline over 10 years	-37.59%	-26.22%	-11.37%
Current Drawdown Current decline from peak	-0.42%	-0.29%	-0.13%
Average Drawdown Average peak-to-trough decline	-5.96%	-4.38%	-1.58%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.52%	1.72%	-0.20%

Volatility

SFLNX vs. RIDAX - Volatility Comparison

Schwab Fundamental US Large Company Index Fund (SFLNX) has a higher volatility of 2.33% compared to The Income Fund of America Class R-1 (RIDAX) at 1.96%. This indicates that SFLNX's price experiences larger fluctuations and is considered to be riskier than RIDAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SFLNX	RIDAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.33%	1.96%	+0.37%
Volatility (6M) Calculated over the trailing 6-month period	7.48%	5.82%	+1.66%
Volatility (1Y) Calculated over the trailing 1-year period	10.48%	7.35%	+3.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.15%	9.45%	+5.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.34%	10.64%	+7.70%

SFLNX vs. RIDAX - Expense Ratio Comparison

SFLNX has a 0.25% expense ratio, which is lower than RIDAX's 1.36% expense ratio.

Dividends

SFLNX vs. RIDAX - Dividend Comparison

SFLNX's dividend yield for the trailing twelve months is around 1.43%, less than RIDAX's 8.60% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RIDAX The Income Fund of America Class R-1	8.60%	9.24%	5.14%	2.38%	6.20%	5.92%	2.09%	4.25%	6.58%	3.68%	2.32%	4.26%
SFLNX Schwab Fundamental US Large Company Index Fund	1.43%	1.68%	1.78%	1.86%	2.09%	4.78%	6.17%	5.33%	9.69%	3.28%	7.23%	5.68%

Frequently Asked Questions

Can I hold both SFLNX and RIDAX in my portfolio?

SFLNX and RIDAX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SFLNX or RIDAX?

SFLNX has higher volatility (2.33%) compared to RIDAX (1.96%). In terms of maximum drawdown, SFLNX dropped -56.18% vs RIDAX's -42.37%.

Which has better risk-adjusted returns?

SFLNX currently has the higher Sharpe Ratio (2.93 vs 2.04), 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.