SLDBX vs. SPINX

Last updated Jun 3, 2026

SLDBX (SEI Institutional Investments Trust Limited Duration Bond Fund) and SPINX (SEI Institutional Investments Trust S&P 500 Index Fund) are both mutual funds - SLDBX is a Short-Term Bond fund managed by SEI, while SPINX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, SLDBX returned 2.17%/yr vs 15.49%/yr for SPINX. At a correlation of -0.03, they often move in opposite directions. SLDBX charges 0.32%/yr vs 0.12%/yr for SPINX.

Performance

SLDBX vs. SPINX - Performance Comparison

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

Returns By Period

In the year-to-date period, SLDBX achieves a 0.80% return, which is significantly lower than SPINX's 11.50% return. Over the past 10 years, SLDBX has underperformed SPINX with an annualized return of 2.17%, while SPINX has yielded a comparatively higher 15.49% annualized return.

SLDBX

• 1D: -0.10%
• 1M: 0.15%
• YTD: 0.80%
• 6M: 1.27%
• 1Y: 4.35%
• 3Y*: 4.51%
• 5Y*: 2.07%
• 10Y*: 2.17%

SPINX

• 1D: 0.26%
• 1M: 5.21%
• YTD: 11.50%
• 6M: 11.99%
• 1Y: 29.60%
• 3Y*: 22.36%
• 5Y*: 13.92%
• 10Y*: 15.49%

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

SLDBX vs. SPINX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SLDBX SEI Institutional Investments Trust Limited Duration Bond Fund	0.80%	5.89%	4.06%	4.35%	-4.09%	-0.17%	4.02%	3.97%	1.81%	1.30%
SPINX SEI Institutional Investments Trust S&P 500 Index Fund	11.50%	17.89%	24.02%	26.24%	-18.27%	28.62%	18.35%	31.42%	-4.46%	21.74%

Correlation

The correlation between SLDBX and SPINX is 0.12, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.12
Correlation (3Y) Calculated over the trailing 3-year period	0.10
Correlation (5Y) Calculated over the trailing 5-year period	0.09
Correlation (10Y) Calculated over the trailing 10-year period	0.01
Correlation (All Time) Calculated using the full available price history since Aug 5, 2014	-0.03

The correlation between SLDBX and SPINX shifts across timeframes, from -0.03 (all time) to 0.12 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

SLDBX vs. SPINX — Risk / Return Rank

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

SLDBX

SLDBX Risk / Return Rank: 76
SLDBX Sharpe Ratio Rank: 50
SLDBX Sortino Ratio Rank: 85
SLDBX Omega Ratio Rank: 82
SLDBX Calmar Ratio Rank: 83
SLDBX Martin Ratio Rank: 81

SPINX

SPINX Risk / Return Rank: 74
SPINX Sharpe Ratio Rank: 77
SPINX Sortino Ratio Rank: 68
SPINX Omega Ratio Rank: 69
SPINX Calmar Ratio Rank: 74
SPINX Martin Ratio Rank: 84

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.

SLDBX vs. SPINX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Investments Trust Limited Duration Bond Fund (SLDBX) and SEI Institutional Investments Trust S&P 500 Index Fund (SPINX). 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.

	SLDBX	SPINX	Difference
Sharpe ratio Return per unit of total volatility	2.10	2.55	-0.45
Sortino ratio Return per unit of downside risk	4.00	3.45	+0.55
Omega ratio Gain probability vs. loss probability	1.55	1.47	+0.08
Calmar ratio Return relative to maximum drawdown	3.84	3.38	+0.46
Martin ratio Return relative to average drawdown	15.14	15.83	-0.69
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SLDBX vs. SPINX - Sharpe Ratio Comparison

The current SLDBX Sharpe Ratio is 2.10, which is comparable to the SPINX Sharpe Ratio of 2.55. The chart below compares the historical Sharpe Ratios of SLDBX and SPINX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	SLDBX	SPINX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.10	2.55	-0.45
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.91	0.62	+0.29
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.19	0.74	+0.44
Sharpe Ratio (All Time) Calculated using the full available price history	1.16	0.72	+0.45

Drawdowns

SLDBX vs. SPINX - Drawdown Comparison

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

Drawdown Indicators

	SLDBX	SPINX	Difference
Max Drawdown Largest peak-to-trough decline	-6.12%	-33.82%	+27.70%
Max Drawdown (1Y) Largest decline over 1 year	-1.23%	-8.92%	+7.69%
Max Drawdown (3Y) Largest decline over 3 years	-1.23%	-32.91%	+31.68%
Max Drawdown (5Y) Largest decline over 5 years	-6.12%	-32.91%	+26.79%
Max Drawdown (10Y) Largest decline over 10 years	-6.12%	-33.82%	+27.70%
Current Drawdown Current decline from peak	-0.10%	0.00%	-0.10%
Average Drawdown Average peak-to-trough decline	-0.71%	-5.22%	+4.51%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.31%	1.90%	-1.59%

Volatility

SLDBX vs. SPINX - Volatility Comparison

The current volatility for SEI Institutional Investments Trust Limited Duration Bond Fund (SLDBX) is 0.62%, while SEI Institutional Investments Trust S&P 500 Index Fund (SPINX) has a volatility of 2.83%. This indicates that SLDBX experiences smaller price fluctuations and is considered to be less risky than SPINX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SLDBX	SPINX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.62%	2.83%	-2.21%
Volatility (6M) Calculated over the trailing 6-month period	1.52%	8.98%	-7.46%
Volatility (1Y) Calculated over the trailing 1-year period	2.03%	11.89%	-9.86%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.28%	22.49%	-20.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.84%	20.95%	-19.11%

SLDBX vs. SPINX - Expense Ratio Comparison

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

Dividends

SLDBX vs. SPINX - Dividend Comparison

SLDBX's dividend yield for the trailing twelve months is around 4.27%, less than SPINX's 10.69% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SLDBX SEI Institutional Investments Trust Limited Duration Bond Fund	4.27%	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	10.69%	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 SLDBX and SPINX in my portfolio?

SLDBX and SPINX have a correlation of 0.12, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SLDBX or SPINX?

SPINX has higher volatility (2.83%) compared to SLDBX (0.62%). In terms of maximum drawdown, SLDBX dropped -6.12% vs SPINX's -33.82%.

Which has better risk-adjusted returns?

SPINX currently has the higher Sharpe Ratio (2.55 vs 2.10), 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.