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SPIIX vs. YFSIX
Performance
Return for Risk
Dividends
Drawdowns
Volatility

SPIIX vs. YFSIX

Last updated Apr 2, 2026

Compare and contrast key facts about SEI S&P 500 Index Fund Class I (SPIIX) and AMG Yacktman Global Fund (YFSIX).

SPIIX is a passively managed fund by SEI that tracks the performance of the S&P 500 Index. It was launched on Jun 28, 2002. YFSIX is managed by AMG. It was launched on Jan 30, 2017.

Performance

SPIIX vs. YFSIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI S&P 500 Index Fund Class I (SPIIX) and AMG Yacktman Global Fund (YFSIX). The values are adjusted to include any dividend payments, if applicable.

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SPIIX vs. YFSIX - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
SPIIX
SEI S&P 500 Index Fund Class I		-4.52%16.97%24.11%25.49%-18.84%28.04%17.66%30.72%-5.00%18.73%
YFSIX
AMG Yacktman Global Fund		9.95%14.91%-0.34%16.64%-9.15%13.13%18.46%24.40%2.18%20.95%

Returns By Period

In the year-to-date period, SPIIX achieves a -4.52% return, which is significantly lower than YFSIX's 9.95% return.

SPIIX

1D
2.92%
1M
-5.07%
YTD
-4.52%
6M
-2.57%
1Y
16.44%
3Y*
17.47%
5Y*
11.00%
10Y*
13.32%

YFSIX

1D
1.66%
1M
-8.77%
YTD
9.95%
6M
1.95%
1Y
23.54%
3Y*
12.32%
5Y*
6.89%
10Y*
—
*Multi-year figures are annualized to reflect compound growth (CAGR)

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SEI S&P 500 Index Fund Class I

AMG Yacktman Global Fund

Often compared with SPIIX:
SPIIX vs. VOOSPIIX vs. FXAIXSPIIX vs. SEPAXSPIIX vs. SMQFXSPIIX vs. LDRAXSPIIX vs. SGYAXSPIIX vs. SIEMX
Often compared with YFSIX:
YFSIX vs. DXIVYFSIX vs. CFIMXYFSIX vs. TAVFXYFSIX vs. YACKXYFSIX vs. AFIFXYFSIX vs. LVHIYFSIX vs. BEQGX

SPIIX vs. YFSIX - Expense Ratio Comparison

SPIIX has a 0.65% expense ratio, which is lower than YFSIX's 0.95% expense ratio.

YFSIX
AMG Yacktman Global Fund
SPIIX
SEI S&P 500 Index Fund Class I

Return for Risk

SPIIX vs. YFSIX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
SPIIX
SPIIX Risk / Return Rank: 5050
Overall Rank
SPIIX Sharpe Ratio Rank: 4040
Sharpe Ratio Rank
SPIIX Sortino Ratio Rank: 4444
Sortino Ratio Rank
SPIIX Omega Ratio Rank: 4848
Omega Ratio Rank
SPIIX Calmar Ratio Rank: 5353
Calmar Ratio Rank
SPIIX Martin Ratio Rank: 6666
Martin Ratio Rank
YFSIX
YFSIX Risk / Return Rank: 5454
Overall Rank
YFSIX Sharpe Ratio Rank: 6060
Sharpe Ratio Rank
YFSIX Sortino Ratio Rank: 3838
Sortino Ratio Rank
YFSIX Omega Ratio Rank: 7474
Omega Ratio Rank
YFSIX Calmar Ratio Rank: 5757
Calmar Ratio Rank
YFSIX Martin Ratio Rank: 4343
Martin Ratio Rank
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.

SPIIX vs. YFSIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI S&P 500 Index Fund Class I (SPIIX) and AMG Yacktman Global Fund (YFSIX). 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.

SPIIXYFSIXDifference

Sharpe ratio

Return per unit of total volatility

0.93

1.16

-0.23

Sortino ratio

Return per unit of downside risk

1.43

1.33

+0.10

Omega ratio

Gain probability vs. loss probability

1.22

1.30

-0.08

Calmar ratio

Return relative to maximum drawdown

1.44

1.52

-0.07

Martin ratio

Return relative to average drawdown

6.86

4.86

+2.00

Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SPIIX vs. YFSIX - Sharpe Ratio Comparison

The current SPIIX Sharpe Ratio is 0.93, which is comparable to the YFSIX Sharpe Ratio of 1.16. The chart below compares the historical Sharpe Ratios of SPIIX and YFSIX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

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Sharpe Ratios by Period

SPIIXYFSIXDifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

0.93

1.16

-0.23

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.60

0.46

+0.14

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.71

—

—

Sharpe Ratio (All Time)

Calculated using the full available price history

0.54

0.72

-0.19

Correlation

The correlation between SPIIX and YFSIX is 0.71, 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

SPIIX vs. YFSIX - Dividend Comparison

SPIIX's dividend yield for the trailing twelve months is around 8.82%, while YFSIX has not paid dividends to shareholders.

TTM20252024202320222021202020192018201720162015
SPIIX
SEI S&P 500 Index Fund Class I		8.82%8.42%12.20%4.10%10.27%7.03%5.78%4.04%3.90%2.08%4.34%1.53%
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%

Drawdowns

SPIIX vs. YFSIX - Drawdown Comparison

The maximum SPIIX drawdown since its inception was -55.78%, which is greater than YFSIX's maximum drawdown of -35.10%. Use the drawdown chart below to compare losses from any high point for SPIIX and YFSIX.

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Drawdown Indicators

SPIIXYFSIXDifference

Max Drawdown

Largest peak-to-trough decline

-55.78%

-35.10%

-20.68%

Max Drawdown (1Y)

Largest decline over 1 year

-12.14%

-14.20%

+2.06%

Max Drawdown (5Y)

Largest decline over 5 years

-25.70%

-25.14%

-0.56%

Max Drawdown (10Y)

Largest decline over 10 years

-33.85%

—

—

Current Drawdown

Current decline from peak

-6.37%

-9.56%

+3.19%

Average Drawdown

Average peak-to-trough decline

-7.33%

-4.94%

-2.39%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.55%

4.43%

-1.88%

Volatility

SPIIX vs. YFSIX - Volatility Comparison

The current volatility for SEI S&P 500 Index Fund Class I (SPIIX) is 5.34%, while AMG Yacktman Global Fund (YFSIX) has a volatility of 9.49%. This indicates that SPIIX experiences smaller price fluctuations and is considered to be less risky than YFSIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

SPIIXYFSIXDifference

Volatility (1M)

Calculated over the trailing 1-month period

5.34%

9.49%

-4.15%

Volatility (6M)

Calculated over the trailing 6-month period

9.54%

19.95%

-10.41%

Volatility (1Y)

Calculated over the trailing 1-year period

18.32%

21.30%

-2.98%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

18.45%

15.13%

+3.32%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

18.86%

16.21%

+2.65%