DEEIX vs. SLDAX

Last updated Jun 23, 2026

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

Performance

DEEIX vs. SLDAX - Performance Comparison

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

Returns By Period

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

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%

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%

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

DEEIX vs. SLDAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
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%
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%

Correlation

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

Return for Risk

DEEIX vs. SLDAX — Risk / Return Rank

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

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

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

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.

DEEIX vs. SLDAX - Risk-Adjusted Trends Comparison

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

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

DEEIX vs. SLDAX - Sharpe Ratio Comparison

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

DEEIX vs. SLDAX - Drawdown Comparison

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

Drawdown Indicators

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

Volatility

DEEIX vs. SLDAX - Volatility Comparison

The current volatility for Delaware Extended Duration Bond Fund (DEEIX) is 1.88%, while SEI Institutional Investments Trust Long Duration Credit Fund (SLDAX) has a volatility of 2.16%. This indicates that DEEIX experiences smaller price fluctuations and is considered to be less risky than SLDAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

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

DEEIX vs. SLDAX - Expense Ratio Comparison

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

Dividends

DEEIX vs. SLDAX - Dividend Comparison

DEEIX's dividend yield for the trailing twelve months is around 5.16%, which matches SLDAX's 5.11% 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 DEEIX and SLDAX in my portfolio?

With a correlation of 0.98, DEEIX and SLDAX 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, DEEIX or SLDAX?

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

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.