IUSB vs NUAG

IUSBAiShares Core Universal USD Bond ETF

NUAGANuveen Enhanced Yield U.S. Aggregate Bond

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.

NUAG The Agg, re-sorted for income. NUAG tracks an ICE BofA index that takes the same investment-grade universe and tilts weight toward its higher-yielding corners, with rules fencing in how far duration and credit quality can drift. Fee: 0.16%.

Stated mandate

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

NUAG The Fund seeks to track, before fees and expenses, the investment results of the ICE BofA Enhanced Yield U.S. Broad Bond Index.

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.

• NUAG Not a market-cap clone. The index buckets the investment-grade universe by asset class, sector, credit, duration and maturity, then leans into higher-yielding buckets while limiting drift from the base index.nuveen.com
• 0.16% sits below the typical fee in the core-bond aisle, which is unusual for a rules-based tilt rather than a plain market-cap tracker.
• Broad plumbing underneath: roughly 1,500 holdings spanning Treasuries, corporates, residential and commercial mortgage paper and asset-backed debt. Pays monthly.nuveen.com
• Running since 2016 and it owns this lane: no other fund in our core-bond coverage tracks the same enhanced-yield index. The portfolio has stayed tight to its stated mandate.

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.

• NUAG Small and thinly traded next to the category's giants, so spreads can be wider and size matters when you trade.
• Plain-vanilla Agg trackers (AGG, SPAB and SCHZ) charge 0.03%. The reweighting engine is what the extra cost buys.
• Tilting toward yield means tilting toward credit and spread risk. The rules cap how far sector weights, duration and tracking error can wander from the Agg, but they do not erase the difference.nuveen.com

Full IUSB profile⁠

Full NUAG profile⁠