IUSB vs SCEC

IUSBAiShares Core Universal USD Bond ETF

SCECBSterling Capital Enhanced Core Bond ETF

In short

IUSB Most core bond funds stop at investment grade. IUSB keeps going, folding high-yield USD debt into the same wrapper across roughly 18,000 bonds, for 0.06% a year.

SCEC A core bond fund that declines to take core bond rate risk. Sterling's active team stays anchored in investment-grade credit but holds average duration to 18 months or less, so yield swings hit the portfolio far more softly.

Stated mandate

IUSB The Fund seeks to track an index of U.S.-dollar-denominated bonds spanning investment-grade and high-yield sectors.

SCEC The Fund seeks enhanced core-bond exposure by actively allocating primarily to fixed-income securities, with investment-grade bonds as the main focus and limited below-investment-grade exposure. It maintains an average duration of 18 months or less.

Why people hold it

• IUSB 0.06% a year, a fraction of what the typical broad bond fund in its category charges, and iShares has run it since 2014.
• Roughly 18,000 bonds spanning investment-grade and high-yield sectors, so one ticker covers ground a plain Agg tracker leaves on the table.ishares.com
• Tracks its index closely, trades heavily, and sits on a multi-billion-dollar asset base. Income is paid monthly.
• Among the strongest implementations in a crowded field of nearly 200 core bond funds.

• SCEC The mandate caps average duration at 18 months or less, keeping price moves from shifting rates short and shallow versus longer core bond portfolios.
• Actively managed with investment-grade bonds doing the heavy lifting and only limited below-investment-grade exposure, so the yield reach stays a sleeve, not the whole bet.
• Pays monthly, and the portfolio it actually holds lines up closely with the strategy the prospectus describes.
• Sits in the upper half of a crowded 187-fund aggregate-bond group despite being one of its newest entrants.

Worth knowing

• IUSB That high-yield sleeve is the trade-off: more credit risk than an investment-grade-only fund, and more movement when spreads widen.
• BND, SPAB and SCHZ charge 0.03%, half IUSB's fee, but they stay inside investment grade.
• Payouts land monthly, but the amount floats with the coupons underneath. Nothing about the income stream is fixed.

• SCEC At 0.39% it runs above the 0.36% category median, and index-tracking rivals like BND, SPAB and SCHZ charge 0.03%. Active management is the line item you are paying for.
• Short duration cuts both ways: muted damage when yields rise, muted lift when they fall. This is not a stand-in for full aggregate-index duration.
• Launched in 2025, so the live record is short and the fund is still building scale next to the index giants in its group.

Full IUSB profile⁠

Full SCEC profile⁠