FNDB vs. FUNFX

Last updated Aug 2, 2026

FNDB (Schwab Fundamental U.S. Broad Market Index ETF) and FUNFX (American Funds Fundamental Investors® Class F-3) are both funds - FNDB is a Large Cap Value Equities fund tracking the RAFI Fundamental High Liquidity US All Index, while FUNFX is a Large Cap Blend Equities fund managed by American Funds. Over the past 5 years, FNDB returned 13.39%/yr vs 14.09%/yr for FUNFX. Their correlation of 0.87 means they have usually moved in the same direction. FNDB charges 0.25%/yr vs 0.28%/yr for FUNFX.

Performance

FNDB vs. FUNFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Schwab Fundamental U.S. Broad Market Index ETF (FNDB) and American Funds Fundamental Investors® Class F-3 (FUNFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FNDB achieves a 17.51% return, which is significantly higher than FUNFX's 12.31% return.

FNDB

• 1D: 0.10%
• 1M: 1.21%
• 6M: 12.62%
• YTD: 17.51%
• 1Y: 32.18%
• 3Y*: 18.54%
• 5Y*: 13.39%
• 10Y*: 14.03%
• ALL TIME*: 12.99%

FUNFX

• 1D: 2.12%
• 1M: -0.96%
• 6M: 8.14%
• YTD: 12.31%
• 1Y: 25.01%
• 3Y*: 22.37%
• 5Y*: 14.09%
• 10Y*: —
• ALL TIME*: 14.50%

*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)
FNDB Schwab Fundamental U.S. Broad Market Index ETF	$5.69M	$5.14M	$4.73M
FUNFX American Funds Fundamental Investors® Class F-3	$0.00	$0.00	$0.00

FNDB vs. FUNFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FNDB Schwab Fundamental U.S. Broad Market Index ETF	17.51%	16.23%	16.25%	18.42%	-7.53%	31.55%	9.40%	28.88%	-8.20%	15.83%
FUNFX American Funds Fundamental Investors® Class F-3	12.31%	24.57%	23.13%	26.25%	-16.38%	22.81%	15.28%	27.47%	-7.87%	19.59%

Correlation

The correlation between FNDB and FUNFX is 0.72, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.72
Correlation (3Y) Balances recent behavior with more history.	0.79
Correlation (5Y) Shows whether the relationship held over a longer period.	0.86
Correlation (All Time) Calculated using the full available price history since Feb 1, 2017	0.87

The correlation between FNDB and FUNFX shifts across timeframes, from 0.72 (1 year) to 0.87 (all time), reflecting how their relationship changes across market environments.

Return for Risk

FNDB vs. FUNFX — Risk / Return Rank

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

FNDB

FNDB Risk / Return Rank: 95
FNDB Sharpe Ratio Rank: 96
FNDB Sortino Ratio Rank: 95
FNDB Omega Ratio Rank: 95
FNDB Calmar Ratio Rank: 94
FNDB Martin Ratio Rank: 95

FUNFX

FUNFX Risk / Return Rank: 64
FUNFX Sharpe Ratio Rank: 62
FUNFX Sortino Ratio Rank: 59
FUNFX Omega Ratio Rank: 58
FUNFX Calmar Ratio Rank: 64
FUNFX Martin Ratio Rank: 76

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.

FNDB vs. FUNFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Schwab Fundamental U.S. Broad Market Index ETF (FNDB) and American Funds Fundamental Investors® Class F-3 (FUNFX). 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.

	FNDB	FUNFX	Difference
Sharpe ratio: Return per unit of total volatility	2.83	1.49	+1.34
Sortino ratio: Return per unit of downside risk	3.92	2.09	+1.83
Omega ratio: Gain probability vs. loss probability	1.52	1.27	+0.26
Calmar ratio: Return relative to maximum drawdown	4.84	2.13	+2.71
Martin ratio: Return relative to average drawdown	19.07	9.21	+9.87

FNDB vs. FUNFX - Sharpe Ratio Comparison

The current FNDB Sharpe Ratio is 2.83, which is higher than the FUNFX Sharpe Ratio of 1.49. The chart below compares the historical Sharpe Ratios of FNDB and FUNFX, 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

FNDB vs. FUNFX - Drawdown Comparison

The maximum FNDB drawdown since its inception was -38.17%, which is greater than FUNFX's maximum drawdown of -33.92%. Use the drawdown chart below to compare losses from any high point for FNDB and FUNFX.

Drawdown Indicators

	FNDB	FUNFX	Difference
Max Drawdown Largest peak-to-trough decline	-38.17%	-33.92%	-4.25%
Max Drawdown (1Y) Largest decline over 1 year	-6.29%	-10.62%	+4.33%
Max Drawdown (3Y) Largest decline over 3 years	-16.83%	-17.93%	+1.10%
Max Drawdown (5Y) Largest decline over 5 years	-19.29%	-24.88%	+5.59%
Max Drawdown (10Y) Largest decline over 10 years	-38.17%	—	—
Current Drawdown Current decline from peak	-0.43%	-2.57%	+2.14%
Average Drawdown Average peak-to-trough decline	-3.62%	-4.66%	+1.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.60%	2.45%	-0.85%

Volatility

FNDB vs. FUNFX - Volatility Comparison

The current volatility for Schwab Fundamental U.S. Broad Market Index ETF (FNDB) is 2.32%, while American Funds Fundamental Investors® Class F-3 (FUNFX) has a volatility of 4.21%. This indicates that FNDB experiences smaller price fluctuations and is considered to be less risky than FUNFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FNDB	FUNFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.32%	4.21%	-1.89%
Volatility (6M) Calculated over the trailing 6-month period	7.65%	12.13%	-4.48%
Volatility (1Y) Calculated over the trailing 1-year period	10.77%	15.16%	-4.39%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.23%	17.01%	-1.78%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.42%	18.11%	-0.69%

FNDB vs. FUNFX - Expense Ratio Comparison

FNDB has a 0.25% expense ratio, which is lower than FUNFX's 0.28% expense ratio.

Dividends

FNDB vs. FUNFX - Dividend Comparison

FNDB's dividend yield for the trailing twelve months is around 1.43%, less than FUNFX's 7.72% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FNDB Schwab Fundamental U.S. Broad Market Index ETF	1.43%	1.62%	1.74%	1.80%	1.98%	1.63%	2.15%	2.23%	2.41%	1.91%	2.06%	2.26%
FUNFX American Funds Fundamental Investors® Class F-3	7.72%	8.83%	9.21%	6.10%	5.33%	11.29%	2.90%	7.21%	9.65%	7.57%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FNDB and FUNFX in my portfolio?

FNDB and FUNFX have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FNDB or FUNFX?

FUNFX has higher volatility (4.21%) compared to FNDB (2.32%). In terms of maximum drawdown, FNDB dropped -38.17% vs FUNFX's -33.92%.

Which has better risk-adjusted returns?

FNDB currently has the higher Sharpe Ratio (2.83 vs 1.49), 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.