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SPINX vs. PLSAX
Performance
Return for Risk
Dividends
Drawdowns
Volatility

SPINX vs. PLSAX

Last updated Apr 2, 2026

Compare and contrast key facts about SEI Institutional Investments Trust S&P 500 Index Fund (SPINX) and Principal LargeCap S&P 500 Index Fund Class A (PLSAX).

SPINX is a passively managed fund by SEI that tracks the performance of the S&P 500 Index. It was launched on Dec 18, 2013. PLSAX is a passively managed fund by Principal Funds that tracks the performance of the S&P 500 Index. It was launched on Feb 2, 2001. Both SPINX and PLSAX are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

SPINX vs. PLSAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Institutional Investments Trust S&P 500 Index Fund (SPINX) and Principal LargeCap S&P 500 Index Fund Class A (PLSAX). The values are adjusted to include any dividend payments, if applicable.

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SPINX vs. PLSAX - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
SPINX
SEI Institutional Investments Trust S&P 500 Index Fund		-4.36%17.89%24.02%26.24%-18.27%28.62%18.35%31.42%-4.46%21.74%
PLSAX
Principal LargeCap S&P 500 Index Fund Class A		-4.39%17.50%26.46%25.70%-18.41%27.93%17.85%30.97%-4.93%21.23%

Returns By Period

The year-to-date returns for both stocks are quite close, with SPINX having a -4.36% return and PLSAX slightly lower at -4.39%. Both investments have delivered pretty close results over the past 10 years, with SPINX having a 13.92% annualized return and PLSAX not far behind at 13.75%.

SPINX

1D
2.94%
1M
-5.04%
YTD
-4.36%
6M
-2.09%
1Y
17.35%
3Y*
17.98%
5Y*
11.54%
10Y*
13.92%

PLSAX

1D
2.93%
1M
-5.03%
YTD
-4.39%
6M
-2.26%
1Y
17.02%
3Y*
18.47%
5Y*
11.69%
10Y*
13.75%
*Multi-year figures are annualized to reflect compound growth (CAGR)

Compare stocks, funds, or ETFs

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SEI Institutional Investments Trust S&P 500 Index Fund

Principal LargeCap S&P 500 Index Fund Class A

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SPINX vs. ITWN.LSPINX vs. SPYSPINX vs. BITOSPINX vs. VUGSPINX vs. vspvxSPINX vs. trbcxSPINX vs. PEOPX
Often compared with PLSAX:
PLSAX vs. VOOPLSAX vs. FXAIXPLSAX vs. VTIPLSAX vs. MEIKXPLSAX vs. SPYPLSAX vs. RPMGXPLSAX vs. SNXFX

SPINX vs. PLSAX - Expense Ratio Comparison

SPINX has a 0.12% expense ratio, which is lower than PLSAX's 0.38% expense ratio.

PLSAX
Principal LargeCap S&P 500 Index Fund Class A
SPINX
SEI Institutional Investments Trust S&P 500 Index Fund

Return for Risk

SPINX vs. PLSAX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
SPINX
SPINX Risk / Return Rank: 5656
Overall Rank
SPINX Sharpe Ratio Rank: 4646
Sharpe Ratio Rank
SPINX Sortino Ratio Rank: 4949
Sortino Ratio Rank
SPINX Omega Ratio Rank: 5353
Omega Ratio Rank
SPINX Calmar Ratio Rank: 5959
Calmar Ratio Rank
SPINX Martin Ratio Rank: 7272
Martin Ratio Rank
PLSAX
PLSAX Risk / Return Rank: 5757
Overall Rank
PLSAX Sharpe Ratio Rank: 4646
Sharpe Ratio Rank
PLSAX Sortino Ratio Rank: 5252
Sortino Ratio Rank
PLSAX Omega Ratio Rank: 5353
Omega Ratio Rank
PLSAX Calmar Ratio Rank: 6060
Calmar Ratio Rank
PLSAX Martin Ratio Rank: 7373
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.

SPINX vs. PLSAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Investments Trust S&P 500 Index Fund (SPINX) and Principal LargeCap S&P 500 Index Fund Class A (PLSAX). 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.

SPINXPLSAXDifference

Sharpe ratio

Return per unit of total volatility

0.97

0.97

0.00

Sortino ratio

Return per unit of downside risk

1.49

1.51

-0.02

Omega ratio

Gain probability vs. loss probability

1.23

1.22

0.00

Calmar ratio

Return relative to maximum drawdown

1.53

1.49

+0.03

Martin ratio

Return relative to average drawdown

7.30

7.18

+0.12

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

SPINX vs. PLSAX - Sharpe Ratio Comparison

The current SPINX Sharpe Ratio is 0.97, which is comparable to the PLSAX Sharpe Ratio of 0.97. The chart below compares the historical Sharpe Ratios of SPINX and PLSAX, 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

SPINXPLSAXDifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

0.97

0.97

0.00

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.52

0.69

-0.18

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.67

0.79

-0.12

Sharpe Ratio (All Time)

Calculated using the full available price history

0.65

0.40

+0.25

Correlation

The correlation between SPINX and PLSAX is 0.98, 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

SPINX vs. PLSAX - Dividend Comparison

SPINX's dividend yield for the trailing twelve months is around 12.44%, more than PLSAX's 2.88% yield.

TTM20252024202320222021202020192018201720162015
SPINX
SEI Institutional Investments Trust S&P 500 Index Fund		12.44%11.90%26.02%9.77%9.59%6.58%3.58%3.01%4.94%2.32%1.97%2.29%
PLSAX
Principal LargeCap S&P 500 Index Fund Class A		2.88%2.75%4.07%3.90%2.70%13.38%7.35%3.57%7.19%6.72%2.93%2.36%

Drawdowns

SPINX vs. PLSAX - Drawdown Comparison

The maximum SPINX drawdown since its inception was -33.82%, smaller than the maximum PLSAX drawdown of -55.67%. Use the drawdown chart below to compare losses from any high point for SPINX and PLSAX.

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Drawdown Indicators

SPINXPLSAXDifference

Max Drawdown

Largest peak-to-trough decline

-33.82%

-55.67%

+21.85%

Max Drawdown (1Y)

Largest decline over 1 year

-12.11%

-12.13%

+0.02%

Max Drawdown (5Y)

Largest decline over 5 years

-32.91%

-24.69%

-8.22%

Max Drawdown (10Y)

Largest decline over 10 years

-33.82%

-33.79%

-0.03%

Current Drawdown

Current decline from peak

-11.03%

-6.27%

-4.76%

Average Drawdown

Average peak-to-trough decline

-5.25%

-10.22%

+4.97%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.53%

2.52%

+0.01%

Volatility

SPINX vs. PLSAX - Volatility Comparison

SEI Institutional Investments Trust S&P 500 Index Fund (SPINX) and Principal LargeCap S&P 500 Index Fund Class A (PLSAX) have volatilities of 5.36% and 5.33%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

SPINXPLSAXDifference

Volatility (1M)

Calculated over the trailing 1-month period

5.36%

5.33%

+0.03%

Volatility (6M)

Calculated over the trailing 6-month period

9.59%

9.53%

+0.06%

Volatility (1Y)

Calculated over the trailing 1-year period

18.34%

18.07%

+0.27%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

22.50%

16.92%

+5.58%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

20.94%

17.48%

+3.46%