BKAG vs IMTB

BKAGABNY Mellon Core Bond ETF

IMTBAiShares Core 5-10 Year USD Bond ETF

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.

IMTB Most core bond funds hand you the entire yield curve. IMTB takes only the 5-to-10-year belly, and its index reaches past the Agg into high yield, for seven basis points a year.

Stated mandate

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

IMTB The fund seeks to track an index of U.S.-dollar-denominated investment-grade and high-yield bonds with remaining maturities between five and ten years.

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.

• IMTB Charges 0.07% a year against a category median near 0.36%. The maturity-sliced build does not carry a boutique price tag.
• The Bloomberg U.S. Universal 5-10 Year Index goes where the Agg stops: investment grade plus a high-yield sleeve, spread across thousands of individual bonds.ishares.com
• Tracks its benchmark very closely and pays monthly, so income arrives on a set cadence rather than in quarterly lumps.
• An iShares Core fund running since 2016, and one of the stronger builds in a core bond aisle that holds well over a hundred competitors.

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.

• IMTB Trades lightly next to giants like BND and SCHZ. Thinner volume can mean wider spreads at the moment you buy or sell.
• One maturity bucket only: no short-end ballast, no long bonds. Moves in intermediate rates hit the whole portfolio at once.
• The high-yield slice adds credit risk that plain Agg trackers (BND, SPAB, SCHZ) leave out, and those three run at 0.03%.

Full BKAG profile⁠

Full IMTB profile⁠