SPINX vs. SLDBX

Last updated Aug 1, 2026

SPINX (SEI Institutional Investments Trust S&P 500 Index Fund) and SLDBX (SEI Institutional Investments Trust Limited Duration Bond Fund) are both mutual funds - SPINX is a S&P 500 fund tracking the S&P 500 Index, while SLDBX is a Short-Term Bond fund managed by SEI. Over the past 10 years, SPINX returned 14.85%/yr vs 2.13%/yr for SLDBX. Their -0.03 correlation means they have often moved in opposite directions in the past. SPINX charges 0.12%/yr vs 0.32%/yr for SLDBX.

Performance

SPINX vs. SLDBX - 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 Limited Duration Bond Fund (SLDBX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SPINX achieves a 9.32% return, which is significantly higher than SLDBX's 0.84% return. Over the past 10 years, SPINX has outperformed SLDBX with an annualized return of 14.85%, while SLDBX has yielded a comparatively lower 2.13% annualized return.

SPINX

• 1D: 1.66%
• 1M: -0.55%
• 6M: 7.77%
• YTD: 9.32%
• 1Y: 20.66%
• 3Y*: 18.70%
• 5Y*: 12.45%
• 10Y*: 14.85%
• ALL TIME*: 13.71%

SLDBX

• 1D: 0.00%
• 1M: -0.21%
• 6M: 0.48%
• YTD: 0.84%
• 1Y: 2.98%
• 3Y*: 4.39%
• 5Y*: 2.04%
• 10Y*: 2.13%
• ALL TIME*: 2.01%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
SLDBX SEI Institutional Investments Trust Limited Duration Bond Fund	$0.00	$0.00	$0.00
SPINX SEI Institutional Investments Trust S&P 500 Index Fund	$0.00	$0.00	$0.00

SPINX vs. SLDBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SPINX SEI Institutional Investments Trust S&P 500 Index Fund	9.32%	17.89%	24.02%	26.24%	-18.27%	28.62%	18.35%	31.42%	-4.46%	21.74%
SLDBX SEI Institutional Investments Trust Limited Duration Bond Fund	0.84%	5.89%	4.06%	4.35%	-4.09%	-0.17%	4.02%	3.97%	1.81%	1.30%

Correlation

The correlation between SPINX and SLDBX is 0.18, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.18
Correlation (3Y) Balances recent behavior with more history.	0.11
Correlation (5Y) Shows whether the relationship held over a longer period.	0.10
Correlation (10Y) Provides a long-term view across more market conditions.	0.02
Correlation (All Time) Calculated using the full available price history since Aug 4, 2014	-0.03

The correlation between SPINX and SLDBX shifts across timeframes, from -0.03 (all time) to 0.18 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

SPINX vs. SLDBX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

SPINX

SPINX Risk / Return Rank: 61
SPINX Sharpe Ratio Rank: 58
SPINX Sortino Ratio Rank: 55
SPINX Omega Ratio Rank: 56
SPINX Calmar Ratio Rank: 61
SPINX Martin Ratio Rank: 73

SLDBX

SLDBX Risk / Return Rank: 86
SLDBX Sharpe Ratio Rank: 78
SLDBX Sortino Ratio Rank: 91
SLDBX Omega Ratio Rank: 89
SLDBX Calmar Ratio Rank: 86
SLDBX Martin Ratio Rank: 88

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

SPINX vs. SLDBX - 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 Limited Duration Bond Fund (SLDBX). 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.

	SPINX	SLDBX	Difference
Sharpe ratio: Return per unit of total volatility	1.43	1.90	-0.46
Sortino ratio: Return per unit of downside risk	2.00	3.50	-1.50
Omega ratio: Gain probability vs. loss probability	1.26	1.47	-0.21
Calmar ratio: Return relative to maximum drawdown	2.07	3.08	-1.01
Martin ratio: Return relative to average drawdown	8.87	12.11	-3.23

SPINX vs. SLDBX - Sharpe Ratio Comparison

The current SPINX Sharpe Ratio is 1.43, which is comparable to the SLDBX Sharpe Ratio of 1.90. The chart below compares the historical Sharpe Ratios of SPINX and SLDBX, 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

SPINX vs. SLDBX - Drawdown Comparison

The maximum SPINX drawdown since its inception was -33.82%, which is greater than SLDBX's maximum drawdown of -6.12%. Use the drawdown chart below to compare losses from any high point for SPINX and SLDBX.

Drawdown Indicators

	SPINX	SLDBX	Difference
Max Drawdown Largest peak-to-trough decline	-33.82%	-6.12%	-27.70%
Max Drawdown (1Y) Largest decline over 1 year	-8.92%	-1.23%	-7.69%
Max Drawdown (3Y) Largest decline over 3 years	-32.91%	-1.23%	-31.68%
Max Drawdown (5Y) Largest decline over 5 years	-32.91%	-6.12%	-26.79%
Max Drawdown (10Y) Largest decline over 10 years	-33.82%	-6.12%	-27.70%
Current Drawdown Current decline from peak	-2.13%	-0.21%	-1.92%
Average Drawdown Average peak-to-trough decline	-5.17%	-0.70%	-4.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.08%	0.31%	+1.77%

Volatility

SPINX vs. SLDBX - Volatility Comparison

SEI Institutional Investments Trust S&P 500 Index Fund (SPINX) has a higher volatility of 3.42% compared to SEI Institutional Investments Trust Limited Duration Bond Fund (SLDBX) at 0.42%. This indicates that SPINX's price experiences larger fluctuations and is considered to be riskier than SLDBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SPINX	SLDBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.42%	0.42%	+3.00%
Volatility (6M) Calculated over the trailing 6-month period	10.07%	1.54%	+8.53%
Volatility (1Y) Calculated over the trailing 1-year period	12.88%	2.01%	+10.87%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.59%	2.29%	+20.30%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.96%	1.85%	+19.11%

SPINX vs. SLDBX - Expense Ratio Comparison

SPINX has a 0.12% expense ratio, which is lower than SLDBX's 0.32% expense ratio.

Dividends

SPINX vs. SLDBX - Dividend Comparison

SPINX's dividend yield for the trailing twelve months is around 10.94%, more than SLDBX's 3.90% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SLDBX SEI Institutional Investments Trust Limited Duration Bond Fund	3.90%	4.34%	3.75%	2.85%	1.30%	1.24%	2.75%	2.77%	2.30%	1.59%	1.44%	1.27%
SPINX SEI Institutional Investments Trust S&P 500 Index Fund	10.94%	11.90%	26.02%	9.77%	9.59%	6.58%	3.58%	3.01%	4.94%	2.32%	1.97%	2.29%

Frequently Asked Questions

Can I hold both SPINX and SLDBX in my portfolio?

SPINX and SLDBX have a correlation of 0.18, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SPINX or SLDBX?

SPINX has higher volatility (3.42%) compared to SLDBX (0.42%). In terms of maximum drawdown, SPINX dropped -33.82% vs SLDBX's -6.12%.

Which has better risk-adjusted returns?

SLDBX currently has the higher Sharpe Ratio (1.90 vs 1.43), 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.