Fund Evaluator:

SEI Long Duration A (SIIT) Overview

SEI Long Duration A (SIIT) (LDRAX) is an actively managed Taxable Bond Long-Term Bond fund. SEI launched the fund in 2004.

The investment seeks return characteristics similar to those of high quality bonds. Under normal circumstances, the fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in investment grade U.S. dollar-denominated fixed income instruments. It will primarily invest in long duration government and corporate fixed income securities and may also invest in synthetic instruments or derivatives having economic characteristics similar to fixed income securities.

About SEI Long Duration A (SIIT) (LDRAX)

There are 22 members of the management team with an average tenure of 6.96 years: Timothy Bacik (2011), Bryan Whalen (2004), Jake Remley (2019), Mike Sheldon (2025), Eric Staudt (2011), Richard Bamford (2014), David Morse (2020), Anthony Karaminas (2021), Samuel Kaplan (2016), James Gaul (2016), Jordan Bond (2017), Patrick Dan (2017), Felipe Telles (2024), Dmitri Rabin (2019), Jim Gubitosi (2017), Ruben Hovhannisyan (2023), Natalia Glekel (2022), Jerry Cudzil (2023), Jason Shoup (2023), Magdalena Szudy (2023), Griffin Sullivan (2024), Adriano Taylor-Escribano (2025). Management tenure is more important for actively managed funds than passive index funds.

The fund has 3 primary benchmarks: Bloomberg US Agg Bond TR USD index with a weighting of 100%, Bloomberg US Long Credit TR USD index with a weighting of 70% and Bloomberg US Government Long TR USD index with a weighting of 30%. SEI Long Duration A (SIIT) has 1014 securities in its portfolio. The top 10 holdings constitute 30.5% of the fund’s assets. The fund meets the SEC requirement of being classified as a diversified fund. The fund is not considered to have an ESG focus with its investment selection and management.

SEI Long Duration A (SIIT) is part of the Fixed Income global asset class and is within the Taxable Bond fund group. SEI Long Duration A (SIIT) has 6.9% of its portfolio invested in foreign issues. The overall assets allocated to domestic stock is 0.0%. There is 0.0% allocated to foreign stock, and 0.0% is allocated to preferred stocks. The bond allocation as a percentage of total assets is 98.3% (91.4% domestic bond, 6.9% foreign bond and 0.0% convertible bond). SEI Long Duration A (SIIT) has 1.7% of the portfolio in cash.

Assets Under Management

The fund has $616 million in total assets, which is below the $738 million average for the Long-Term Bond category. Normally, lower assets under management translates to higher average expense ratios, and greater total assets are desired. However, for some investment categories, such as small-cap investing, it may be difficult for the manager to fully employ the desired active strategy if assets grow too large or too quickly.

LDRAX Performance and Fees

The expense ratio measures how much of a fund’s assets are used for administrative expenses and operating expenses, including adviser fees and fees for the transfer agent and custodial services. The SEI Long Duration A (SIIT) expense ratio is low compared to funds in the Long-Term Bond category. SEI Long Duration A (SIIT) has an expense ratio of 0.16%, which is 84% lower than its category average, making the fund expense ratio grade a B. While it is difficult to predict returns, it is known that high annual expense ratios reduce your rate of return, and excessive fees are difficult to overcome. Active management normally comes with higher expense ratios than passive index management. Certain investment categories such as small company and foreign also normally have higher expense ratios. It is best to compare fund expense ratios against the category averages for meaningful assessments.

High portfolio turnover can translate to higher expenses and lower aftertax returns. SEI Long Duration A (SIIT) has a portfolio turnover rate of 176%, indicating that holds its assets around 0.0 years. By way of comparison, the average portfolio turnover is 77% for the Long-Term Bond category.

Recently, in the month of July 2026, SEI Long Duration A (SIIT) returned -3.9%, which earned it a grade of B, as the Long-Term Bond category had an average return of -3.6%. The letter grades of A, B, C, D and F are based upon relative rankings within the investment category. A grade of A, for example, would indicate that the return is in the highest 20% for that time period compared to all funds in that category.

SEI Long Duration A (SIIT) has a trailing yield of 5.42%, which is above the 5.18% category average. The fund normally distributes its income monthly and its capital gains annually.

It’s natural to seek the best-performing investments, but you must consider the relationship between risk and return and the impact of costs and taxes on your realized returns.

SEI Long Duration A (SIIT) Grades

Year to date, the fund has returned -3.0%, 0.5 percentage points worse than the category, which translates into a grade of F. The fund has returned 0.2% over the past year (grade of D), 1.5% over the past three years (grade of F) and -4.6% per year over the past five years (grade of D) and 0.9% per year over the past 10 years (grade of C).

For more mutual fund grades, analysis and screening tools to help your investment discovery, join AAII for a $2, full-access trial. Learn more here: https://invest.aaii.com/membership.

Otherwise, for more information about SEI Long Duration A (SIIT), including its riskiness, submit your email to unlock the rest of the article.