YFSIX vs. AFIFX

Last updated Jun 23, 2026

YFSIX (AMG Yacktman Global Fund) and AFIFX (American Funds Fundamental Investors Class F-1) are both Large Cap Blend Equities funds. Over the past 5 years, YFSIX returned 8.69%/yr vs 15.02%/yr for AFIFX. A 0.73 correlation means they provide meaningful diversification when combined. YFSIX charges 0.95%/yr vs 0.64%/yr for AFIFX.

Performance

YFSIX vs. AFIFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AMG Yacktman Global Fund (YFSIX) 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, YFSIX achieves a 24.17% return, which is significantly higher than AFIFX's 14.84% return.

YFSIX

• 1D: 0.30%
• 1M: 0.70%
• YTD: 24.17%
• 6M: 26.91%
• 1Y: 23.55%
• 3Y*: 15.80%
• 5Y*: 8.69%
• 10Y*: —

AFIFX

• 1D: 1.52%
• 1M: 2.46%
• YTD: 14.84%
• 6M: 15.13%
• 1Y: 33.05%
• 3Y*: 24.79%
• 5Y*: 15.02%
• 10Y*: 14.89%

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

YFSIX vs. AFIFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
YFSIX AMG Yacktman Global Fund	24.17%	14.91%	-0.34%	16.64%	-9.15%	13.13%	18.46%	24.40%	2.18%	20.95%
AFIFX American Funds Fundamental Investors Class F-1	14.84%	24.12%	22.68%	25.78%	-16.69%	22.36%	14.85%	27.00%	-8.19%	19.20%

Correlation

The correlation between YFSIX and AFIFX is 0.53, 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	0.53
Correlation (3Y) Calculated over the trailing 3-year period	0.59
Correlation (5Y) Calculated over the trailing 5-year period	0.70
Correlation (All Time) Calculated using the full available price history since Feb 2, 2017	0.73

Over the past year, the correlation between YFSIX and AFIFX has dropped to 0.53 - well below their long-term average of 0.73, suggesting their price drivers have been diverging.

Return for Risk

YFSIX vs. AFIFX — Risk / Return Rank

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

YFSIX

YFSIX Risk / Return Rank: 21
YFSIX Sharpe Ratio Rank: 17
YFSIX Sortino Ratio Rank: 12
YFSIX Omega Ratio Rank: 30
YFSIX Calmar Ratio Rank: 24
YFSIX Martin Ratio Rank: 23

AFIFX

AFIFX Risk / Return Rank: 70
AFIFX Sharpe Ratio Rank: 71
AFIFX Sortino Ratio Rank: 63
AFIFX Omega Ratio Rank: 64
AFIFX Calmar Ratio Rank: 70
AFIFX Martin Ratio Rank: 80

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.

YFSIX vs. AFIFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AMG Yacktman Global Fund (YFSIX) 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.

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.

	YFSIX	AFIFX	Difference
Sharpe ratio: Return per unit of total volatility	1.09	2.26	-1.16
Sortino ratio: Return per unit of downside risk	1.29	3.03	-1.75
Omega ratio: Gain probability vs. loss probability	1.27	1.40	-0.14
Calmar ratio: Return relative to maximum drawdown	1.68	3.09	-1.41
Martin ratio: Return relative to average drawdown	5.24	13.89	-8.65

YFSIX vs. AFIFX - Sharpe Ratio Comparison

The current YFSIX Sharpe Ratio is 1.09, which is lower than the AFIFX Sharpe Ratio of 2.26. The chart below compares the historical Sharpe Ratios of YFSIX 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.

Drawdowns

YFSIX vs. AFIFX - Drawdown Comparison

The maximum YFSIX drawdown since its inception was -35.10%, smaller than the maximum AFIFX drawdown of -53.25%. Use the drawdown chart below to compare losses from any high point for YFSIX and AFIFX.

Drawdown Indicators

	YFSIX	AFIFX	Difference
Max Drawdown Largest peak-to-trough decline	-35.10%	-53.25%	+18.15%
Max Drawdown (1Y) Largest decline over 1 year	-14.20%	-10.67%	-3.53%
Max Drawdown (3Y) Largest decline over 3 years	-14.20%	-17.99%	+3.79%
Max Drawdown (5Y) Largest decline over 5 years	-25.14%	-25.11%	-0.03%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.92%	—
Current Drawdown Current decline from peak	-3.18%	-0.23%	-2.95%
Average Drawdown Average peak-to-trough decline	-4.89%	-7.36%	+2.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.53%	2.37%	+2.16%

Volatility

YFSIX vs. AFIFX - Volatility Comparison

AMG Yacktman Global Fund (YFSIX) has a higher volatility of 6.52% compared to American Funds Fundamental Investors Class F-1 (AFIFX) at 5.64%. This indicates that YFSIX'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

	YFSIX	AFIFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.52%	5.64%	+0.88%
Volatility (6M) Calculated over the trailing 6-month period	21.38%	11.78%	+9.60%
Volatility (1Y) Calculated over the trailing 1-year period	21.84%	14.60%	+7.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.54%	16.94%	-1.40%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.30%	17.79%	-1.49%

YFSIX vs. AFIFX - Expense Ratio Comparison

YFSIX has a 0.95% expense ratio, which is higher than AFIFX's 0.64% expense ratio.

Dividends

YFSIX vs. AFIFX - Dividend Comparison

YFSIX has not paid dividends to shareholders, while AFIFX's dividend yield for the trailing twelve months is around 7.20%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AFIFX American Funds Fundamental Investors Class F-1	7.20%	8.48%	8.84%	5.76%	4.92%	10.91%	2.57%	6.86%	9.21%	7.21%	4.65%	6.01%
YFSIX AMG Yacktman Global Fund	0.00%	0.00%	8.68%	8.02%	4.32%	8.18%	4.76%	6.59%	0.71%	2.63%	0.00%	0.00%

Frequently Asked Questions

Can I hold both YFSIX and AFIFX in my portfolio?

YFSIX and AFIFX have a correlation of 0.53, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, YFSIX or AFIFX?

YFSIX has higher volatility (6.52%) compared to AFIFX (5.64%). In terms of maximum drawdown, YFSIX dropped -35.10% vs AFIFX's -53.25%.

Which has better risk-adjusted returns?

AFIFX currently has the higher Sharpe Ratio (2.26 vs 1.09), 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.