FTZIX vs. AFIFX

Last updated Jun 4, 2026

FTZIX (Fuller & Thaler Behavioral Unconstrained Equity Fund) and AFIFX (American Funds Fundamental Investors Class F-1) are both Large Cap Blend Equities funds. Over the past 5 years, FTZIX returned 13.76%/yr vs 14.84%/yr for AFIFX. Their correlation of 0.87 suggests significant overlap in exposure. FTZIX charges 1.12%/yr vs 0.64%/yr for AFIFX.

Performance

FTZIX vs. AFIFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fuller & Thaler Behavioral Unconstrained Equity Fund (FTZIX) and American Funds Fundamental Investors Class F-1 (AFIFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FTZIX achieves a 14.34% return, which is significantly lower than AFIFX's 15.10% return.

FTZIX

• 1D: 1.00%
• 1M: 3.08%
• YTD: 14.34%
• 6M: 16.39%
• 1Y: 37.58%
• 3Y*: 26.30%
• 5Y*: 13.76%
• 10Y*: —

AFIFX

• 1D: 0.00%
• 1M: 5.89%
• YTD: 15.10%
• 6M: 16.10%
• 1Y: 34.46%
• 3Y*: 26.02%
• 5Y*: 14.84%
• 10Y*: 14.83%

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

FTZIX vs. AFIFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
FTZIX Fuller & Thaler Behavioral Unconstrained Equity Fund	14.34%	22.63%	25.31%	27.18%	-21.31%	25.25%	19.60%	33.70%
AFIFX American Funds Fundamental Investors Class F-1	15.10%	24.12%	22.68%	25.78%	-16.69%	22.36%	14.85%	27.00%

Correlation

The correlation between FTZIX and AFIFX is 0.72, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.72
Correlation (3Y) Calculated over the trailing 3-year period	0.79
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (All Time) Calculated using the full available price history since Jan 2, 2019	0.87

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

Return for Risk

FTZIX vs. AFIFX — Risk / Return Rank

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

FTZIX

FTZIX Risk / Return Rank: 74
FTZIX Sharpe Ratio Rank: 71
FTZIX Sortino Ratio Rank: 68
FTZIX Omega Ratio Rank: 55
FTZIX Calmar Ratio Rank: 89
FTZIX Martin Ratio Rank: 88

AFIFX

AFIFX Risk / Return Rank: 74
AFIFX Sharpe Ratio Rank: 79
AFIFX Sortino Ratio Rank: 69
AFIFX Omega Ratio Rank: 69
AFIFX Calmar Ratio Rank: 73
AFIFX Martin Ratio Rank: 82

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.

FTZIX vs. AFIFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fuller & Thaler Behavioral Unconstrained Equity Fund (FTZIX) and American Funds Fundamental Investors Class F-1 (AFIFX). 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.

	FTZIX	AFIFX	Difference
Sharpe ratio: Return per unit of total volatility	2.45	2.58	-0.13
Sortino ratio: Return per unit of downside risk	3.45	3.46	-0.01
Omega ratio: Gain probability vs. loss probability	1.41	1.46	-0.05
Calmar ratio: Return relative to maximum drawdown	4.46	3.32	+1.14
Martin ratio: Return relative to average drawdown	17.09	15.36	+1.73
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FTZIX vs. AFIFX - Sharpe Ratio Comparison

The current FTZIX Sharpe Ratio is 2.45, which is comparable to the AFIFX Sharpe Ratio of 2.58. The chart below compares the historical Sharpe Ratios of FTZIX and AFIFX, 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

	FTZIX	AFIFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.45	2.58	-0.13
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.71	0.89	-0.18
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.84	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.83	0.59	+0.24

Drawdowns

FTZIX vs. AFIFX - Drawdown Comparison

The maximum FTZIX drawdown since its inception was -37.22%, smaller than the maximum AFIFX drawdown of -53.25%. Use the drawdown chart below to compare losses from any high point for FTZIX and AFIFX.

Drawdown Indicators

	FTZIX	AFIFX	Difference
Max Drawdown Largest peak-to-trough decline	-37.22%	-53.25%	+16.03%
Max Drawdown (1Y) Largest decline over 1 year	-9.03%	-10.67%	+1.64%
Max Drawdown (3Y) Largest decline over 3 years	-18.65%	-17.99%	-0.66%
Max Drawdown (5Y) Largest decline over 5 years	-29.53%	-25.11%	-4.42%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.92%	—
Current Drawdown Current decline from peak	-1.13%	0.00%	-1.13%
Average Drawdown Average peak-to-trough decline	-6.51%	-7.37%	+0.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.35%	2.30%	+0.05%

Volatility

FTZIX vs. AFIFX - Volatility Comparison

Fuller & Thaler Behavioral Unconstrained Equity Fund (FTZIX) has a higher volatility of 5.59% compared to American Funds Fundamental Investors Class F-1 (AFIFX) at 3.69%. This indicates that FTZIX's price experiences larger fluctuations and is considered to be riskier than AFIFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FTZIX	AFIFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.59%	3.69%	+1.90%
Volatility (6M) Calculated over the trailing 6-month period	12.79%	10.82%	+1.97%
Volatility (1Y) Calculated over the trailing 1-year period	16.42%	13.74%	+2.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.43%	16.79%	+2.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.34%	17.73%	+4.61%

FTZIX vs. AFIFX - Expense Ratio Comparison

FTZIX has a 1.12% expense ratio, which is higher than AFIFX's 0.64% expense ratio.

Dividends

FTZIX vs. AFIFX - Dividend Comparison

FTZIX's dividend yield for the trailing twelve months is around 0.04%, less than AFIFX's 7.38% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AFIFX American Funds Fundamental Investors Class F-1	7.38%	8.48%	8.84%	5.76%	4.92%	10.91%	2.57%	6.86%	9.21%	7.21%	4.65%	6.01%
FTZIX Fuller & Thaler Behavioral Unconstrained Equity Fund	0.04%	0.05%	0.11%	0.19%	0.00%	0.00%	0.26%	0.76%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FTZIX and AFIFX in my portfolio?

FTZIX and AFIFX 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, FTZIX or AFIFX?

FTZIX has higher volatility (5.59%) compared to AFIFX (3.69%). In terms of maximum drawdown, FTZIX dropped -37.22% vs AFIFX's -53.25%.

Which has better risk-adjusted returns?

AFIFX currently has the higher Sharpe Ratio (2.58 vs 2.45), 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.