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SPINX vs. ENIAX
Performance
Return for Risk
Dividends
Drawdowns
Volatility

SPINX vs. ENIAX

Last updated Apr 2, 2026

Compare and contrast key facts about SEI Institutional Investments Trust S&P 500 Index Fund (SPINX) and SEI Institutional Investments Trust Opportunistic Income Fund (ENIAX).

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. ENIAX is managed by SEI. It was launched on Dec 13, 2006.

Performance

SPINX vs. ENIAX - 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 SEI Institutional Investments Trust Opportunistic Income Fund (ENIAX). The values are adjusted to include any dividend payments, if applicable.

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SPINX vs. ENIAX - 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%
ENIAX
SEI Institutional Investments Trust Opportunistic Income Fund		0.38%6.14%8.34%7.94%-1.16%2.67%2.47%5.82%1.82%3.93%

Returns By Period

In the year-to-date period, SPINX achieves a -4.36% return, which is significantly lower than ENIAX's 0.38% return. Over the past 10 years, SPINX has outperformed ENIAX with an annualized return of 13.92%, while ENIAX has yielded a comparatively lower 4.17% annualized return.

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%

ENIAX

1D
0.00%
1M
0.25%
YTD
0.38%
6M
1.58%
1Y
5.36%
3Y*
6.73%
5Y*
4.57%
10Y*
4.17%
*Multi-year figures are annualized to reflect compound growth (CAGR)

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SEI Institutional Investments Trust S&P 500 Index Fund

SEI Institutional Investments Trust Opportunistic Income Fund

Often compared with SPINX:
SPINX vs. ITWN.LSPINX vs. SPYSPINX vs. BITOSPINX vs. VUGSPINX vs. vspvxSPINX vs. trbcxSPINX vs. PEOPX
Often compared with ENIAX:
ENIAX vs. PAAAENIAX vs. DBSCXENIAX vs. FLTRENIAX vs. HICOXENIAX vs. DFLYXENIAX vs. CLOIENIAX vs. SGOV

SPINX vs. ENIAX - Expense Ratio Comparison

SPINX has a 0.12% expense ratio, which is lower than ENIAX's 0.23% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

ENIAX
SEI Institutional Investments Trust Opportunistic Income Fund
SPINX
SEI Institutional Investments Trust S&P 500 Index Fund

Return for Risk

SPINX vs. ENIAX — 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
ENIAX
ENIAX Risk / Return Rank: 9292
Overall Rank
ENIAX Sharpe Ratio Rank: 9090
Sharpe Ratio Rank
ENIAX Sortino Ratio Rank: 8787
Sortino Ratio Rank
ENIAX Omega Ratio Rank: 9999
Omega Ratio Rank
ENIAX Calmar Ratio Rank: 9090
Calmar Ratio Rank
ENIAX Martin Ratio Rank: 9292
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. ENIAX - 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 SEI Institutional Investments Trust Opportunistic Income Fund (ENIAX). 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.

SPINXENIAXDifference

Sharpe ratio

Return per unit of total volatility

0.97

1.89

-0.92

Sortino ratio

Return per unit of downside risk

1.49

2.45

-0.96

Omega ratio

Gain probability vs. loss probability

1.23

2.41

-1.18

Calmar ratio

Return relative to maximum drawdown

1.53

2.54

-1.02

Martin ratio

Return relative to average drawdown

7.30

11.20

-3.90

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. ENIAX - Sharpe Ratio Comparison

The current SPINX Sharpe Ratio is 0.97, which is lower than the ENIAX Sharpe Ratio of 1.89. The chart below compares the historical Sharpe Ratios of SPINX and ENIAX, 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

SPINXENIAXDifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

0.97

1.89

-0.92

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.52

1.61

-1.09

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.67

1.50

-0.83

Sharpe Ratio (All Time)

Calculated using the full available price history

0.65

0.65

0.00

Correlation

The correlation between SPINX and ENIAX is 0.17, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

SPINX vs. ENIAX - Dividend Comparison

SPINX's dividend yield for the trailing twelve months is around 12.44%, more than ENIAX's 5.98% 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%
ENIAX
SEI Institutional Investments Trust Opportunistic Income Fund		5.98%6.00%6.78%5.33%4.07%2.66%2.96%4.32%3.96%3.02%2.75%2.54%

Drawdowns

SPINX vs. ENIAX - Drawdown Comparison

The maximum SPINX drawdown since its inception was -33.82%, roughly equal to the maximum ENIAX drawdown of -33.30%. Use the drawdown chart below to compare losses from any high point for SPINX and ENIAX.

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Drawdown Indicators

SPINXENIAXDifference

Max Drawdown

Largest peak-to-trough decline

-33.82%

-33.30%

-0.52%

Max Drawdown (1Y)

Largest decline over 1 year

-12.11%

-2.11%

-10.00%

Max Drawdown (5Y)

Largest decline over 5 years

-32.91%

-3.52%

-29.39%

Max Drawdown (10Y)

Largest decline over 10 years

-33.82%

-13.45%

-20.37%

Current Drawdown

Current decline from peak

-11.03%

0.00%

-11.03%

Average Drawdown

Average peak-to-trough decline

-5.25%

-7.86%

+2.61%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.53%

0.48%

+2.05%

Volatility

SPINX vs. ENIAX - Volatility Comparison

SEI Institutional Investments Trust S&P 500 Index Fund (SPINX) has a higher volatility of 5.36% compared to SEI Institutional Investments Trust Opportunistic Income Fund (ENIAX) at 0.36%. This indicates that SPINX's price experiences larger fluctuations and is considered to be riskier than ENIAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

SPINXENIAXDifference

Volatility (1M)

Calculated over the trailing 1-month period

5.36%

0.36%

+5.00%

Volatility (6M)

Calculated over the trailing 6-month period

9.59%

0.66%

+8.93%

Volatility (1Y)

Calculated over the trailing 1-year period

18.34%

2.85%

+15.49%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

22.50%

2.86%

+19.64%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

20.94%

2.78%

+18.16%