IUSB vs NUBD

IUSBAiShares Core Universal USD Bond ETF

NUBDANuveen ESG 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.

NUBD The core bond index, run through an ESG filter. NUBD tracks a Bloomberg MSCI U.S. Aggregate ESG Select benchmark across roughly 2,400 investment-grade bonds, at a fraction of what the typical bond fund in its group charges.

Stated mandate

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

NUBD The Fund passively invests in diversified U.S. investment-grade bonds that meet environmental, social and governance criteria and seeks to track the Bloomberg Barclays MSCI U.S. Aggregate ESG Select Index before fees and expenses.

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.

• NUBD 0.12% a year, versus a category median around 0.36%. In a low-yield asset class, that gap is most of what an investor actually controls.
• Live since 2017, making it one of the longer-running ESG-screened aggregate bond ETFs rather than a recent launch chasing the theme.
• Roughly 2,400 investment-grade bonds, so no single issuer drives the fund, and it pays monthly like a plain core bond holding.
• Clean mandate: a standard U.S. aggregate bond exposure with the ESG screen layered on top, and it ranks in the top quartile of a 187-fund aggregate bond group.

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.

• NUBD The unscreened giants (BND, SPAB, SCHZ) run at 0.03%. The ESG screen carries a real, if small, price tag over vanilla aggregate exposure.
• Mid-sized and only moderately traded next to the household-name bond ETFs, which can show up as wider spreads at the point of trade.
• The screen changes which bonds it owns, not how it behaves: this is still a full aggregate mandate, so prices move with interest rates.

Full IUSB profile⁠

Full NUBD profile⁠