SLDAX vs. DEEIX

Last updated Jun 23, 2026

SLDAX (SEI Institutional Investments Trust Long Duration Credit Fund) and DEEIX (Delaware Extended Duration Bond Fund) are both Long-Term Bond funds. Over the past 10 years, SLDAX returned 1.69%/yr vs 2.07%/yr for DEEIX. Their correlation of 0.95 suggests significant overlap in exposure. SLDAX charges 0.14%/yr vs 0.57%/yr for DEEIX.

Performance

SLDAX vs. DEEIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Institutional Investments Trust Long Duration Credit Fund (SLDAX) and Delaware Extended Duration Bond Fund (DEEIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SLDAX achieves a 0.97% return, which is significantly lower than DEEIX's 1.51% return. Over the past 10 years, SLDAX has underperformed DEEIX with an annualized return of 1.69%, while DEEIX has yielded a comparatively higher 2.07% annualized return.

SLDAX

• 1D: 0.39%
• 1M: 1.89%
• YTD: 0.97%
• 6M: 1.41%
• 1Y: 6.58%
• 3Y*: 3.16%
• 5Y*: -3.39%
• 10Y*: 1.69%

DEEIX

• 1D: 0.29%
• 1M: 1.90%
• YTD: 1.51%
• 6M: 2.03%
• 1Y: 6.88%
• 3Y*: 3.88%
• 5Y*: -2.84%
• 10Y*: 2.07%

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

SLDAX vs. DEEIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SLDAX SEI Institutional Investments Trust Long Duration Credit Fund	0.97%	7.37%	-2.78%	8.14%	-26.58%	-2.80%	16.56%	21.45%	-6.23%	11.67%
DEEIX Delaware Extended Duration Bond Fund	1.51%	6.26%	-1.29%	9.21%	-26.47%	-0.70%	15.17%	22.02%	-7.69%	12.61%

Correlation

The correlation between SLDAX and DEEIX is 0.98 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.98
Correlation (3Y) Calculated over the trailing 3-year period	0.98
Correlation (5Y) Calculated over the trailing 5-year period	0.98
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Jul 2, 2012	0.95

The correlation between SLDAX and DEEIX has been stable across timeframes, ranging from 0.95 to 0.98 - a consistent structural relationship.

Return for Risk

SLDAX vs. DEEIX — Risk / Return Rank

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

SLDAX

SLDAX Risk / Return Rank: 12
SLDAX Sharpe Ratio Rank: 11
SLDAX Sortino Ratio Rank: 11
SLDAX Omega Ratio Rank: 11
SLDAX Calmar Ratio Rank: 15
SLDAX Martin Ratio Rank: 11

DEEIX

DEEIX Risk / Return Rank: 13
DEEIX Sharpe Ratio Rank: 13
DEEIX Sortino Ratio Rank: 13
DEEIX Omega Ratio Rank: 11
DEEIX Calmar Ratio Rank: 16
DEEIX Martin Ratio Rank: 12

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.

SLDAX vs. DEEIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Investments Trust Long Duration Credit Fund (SLDAX) and Delaware Extended Duration Bond Fund (DEEIX). 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.

	SLDAX	DEEIX	Difference
Sharpe ratio: Return per unit of total volatility	0.86	0.92	-0.06
Sortino ratio: Return per unit of downside risk	1.28	1.37	-0.09
Omega ratio: Gain probability vs. loss probability	1.15	1.16	-0.01
Calmar ratio: Return relative to maximum drawdown	1.25	1.33	-0.08
Martin ratio: Return relative to average drawdown	3.08	3.39	-0.30

SLDAX vs. DEEIX - Sharpe Ratio Comparison

The current SLDAX Sharpe Ratio is 0.86, which is comparable to the DEEIX Sharpe Ratio of 0.92. The chart below compares the historical Sharpe Ratios of SLDAX and DEEIX, 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

SLDAX vs. DEEIX - Drawdown Comparison

The maximum SLDAX drawdown since its inception was -36.12%, roughly equal to the maximum DEEIX drawdown of -34.48%. Use the drawdown chart below to compare losses from any high point for SLDAX and DEEIX.

Drawdown Indicators

	SLDAX	DEEIX	Difference
Max Drawdown Largest peak-to-trough decline	-36.12%	-34.48%	-1.64%
Max Drawdown (1Y) Largest decline over 1 year	-5.19%	-5.14%	-0.05%
Max Drawdown (3Y) Largest decline over 3 years	-13.62%	-12.53%	-1.09%
Max Drawdown (5Y) Largest decline over 5 years	-35.17%	-34.48%	-0.69%
Max Drawdown (10Y) Largest decline over 10 years	-36.12%	-34.48%	-1.64%
Current Drawdown Current decline from peak	-19.50%	-16.23%	-3.27%
Average Drawdown Average peak-to-trough decline	-10.64%	-6.46%	-4.18%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.10%	2.02%	+0.08%

Volatility

SLDAX vs. DEEIX - Volatility Comparison

SEI Institutional Investments Trust Long Duration Credit Fund (SLDAX) has a higher volatility of 2.16% compared to Delaware Extended Duration Bond Fund (DEEIX) at 1.88%. This indicates that SLDAX's price experiences larger fluctuations and is considered to be riskier than DEEIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SLDAX	DEEIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.16%	1.88%	+0.28%
Volatility (6M) Calculated over the trailing 6-month period	5.60%	5.41%	+0.19%
Volatility (1Y) Calculated over the trailing 1-year period	7.55%	7.43%	+0.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	12.13%	11.60%	+0.53%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	11.27%	10.60%	+0.67%

SLDAX vs. DEEIX - Expense Ratio Comparison

SLDAX has a 0.14% expense ratio, which is lower than DEEIX's 0.57% expense ratio.

Dividends

SLDAX vs. DEEIX - Dividend Comparison

SLDAX's dividend yield for the trailing twelve months is around 5.11%, which matches DEEIX's 5.16% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DEEIX Delaware Extended Duration Bond Fund	5.16%	5.05%	4.90%	3.95%	4.35%	7.87%	10.28%	4.79%	4.56%	3.74%	3.75%	4.62%
SLDAX SEI Institutional Investments Trust Long Duration Credit Fund	5.11%	5.03%	4.63%	3.38%	3.27%	5.81%	7.64%	3.79%	4.26%	4.41%	4.22%	6.63%

Frequently Asked Questions

Can I hold both SLDAX and DEEIX in my portfolio?

With a correlation of 0.98, SLDAX and DEEIX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, SLDAX or DEEIX?

SLDAX has higher volatility (2.16%) compared to DEEIX (1.88%). In terms of maximum drawdown, SLDAX dropped -36.12% vs DEEIX's -34.48%.

Which has better risk-adjusted returns?

DEEIX currently has the higher Sharpe Ratio (0.92 vs 0.86), 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.