BKAG vs NUBD

BKAGABNY Mellon Core Bond ETF

NUBDANuveen ESG U.S. Aggregate Bond

In short

BKAG A core bond index fund that charges nothing. BKAG tracks the same Bloomberg US Aggregate benchmark the giants track, at a 0.00% expense ratio, and has been doing it since 2020.

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

BKAG The fund seeks to track the Bloomberg US Aggregate Total Return Index.

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

• BKAG A 0.00% expense ratio. The median fund in the core bond group charges 0.36%, and even the cheap giants (BND, SPAB, SCHZ) charge 0.03%.
• Tracks the Bloomberg US Aggregate Total Return Index tightly, one of the closest index-following records in its peer group.
• Broad by design: roughly 4,000 bonds in the portfolio, with distributions paid monthly rather than quarterly.
• A multi-billion-dollar fund from BNY Mellon, wrapped in a standard 1940 Act ETF structure with no exotic mechanics.

• 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

• BKAG Rate risk is the trade-off. This is full-market bond exposure, and bond prices move opposite interest rates. Volatility is the weakest part of its profile.
• Moderately traded, not one of the volume monsters in the category. Spreads and limit orders matter more here than with the largest core bond names.
• At zero, the fee edge over 0.03% rivals is real but small in dollar terms, so tracking and trading costs do more of the work.

• 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 BKAG profile⁠

Full NUBD profile⁠