AGG vs BNDC

AGGAiShares Core U.S. Aggregate Bond ETF

BNDCBNorthern Trust Core Bond ETF

In short

AGG Launched in 2003, one of the first funds to pack the entire U.S. investment-grade bond market into a single ticker: Treasuries, corporates and mortgage bonds, three basis points a year, cash paid monthly.

BNDC A bond fund built out of bond funds: Northern Trust's fixed-income team actively dials duration and sector mix across Treasuries, corporates and MBS, expressed through mostly passive ETFs. One ticker, an active allocation call underneath.

Stated mandate

AGG The fund seeks to track the Bloomberg U.S. Aggregate Bond Index, providing broad exposure to the total U.S. investment-grade bond market.

BNDC The Fund seeks total return and preservation of capital. It invests primarily in diversified, U.S.-dollar investment-grade fixed-income securities of varying maturities, including government, corporate, bank, mortgage-backed, and asset-backed instruments.

Why people hold it

• AGG 0.03% a year against a peer-group median near 0.36%. On a bond fund, the fee comes straight out of the coupon, so the gap matters more than it looks.
• A $100 billion-plus fund and very actively traded, the kind of depth that keeps bid-ask costs down for retail-sized orders.
• Tracks the Bloomberg U.S. Aggregate closely, with one of the tightest index-following records in its peer group. Income is distributed monthly.
• Running since 2003, giving it one of the longest track records among U.S. bond index ETFs.

• BNDC Active where most of the category is passive: the team sets duration and sector tilts, then expresses them through passive bond ETFs spanning Treasuries, corporates, MBS and TIPS.flexshares.comflexshares.com 2
• Costs 0.35% net of a waiver through March 1, 2027, against a 0.49% gross figure, and that sits near the category median despite active management.
• Stays close to its stated mandate: diversified US-dollar investment-grade bonds across government, corporate, bank, mortgage-backed and asset-backed issues. Pays monthly.

Worth knowing

• AGG Investment grade and U.S. dollar only. High-yield debt and foreign bonds sit outside the mandate, so this is designed as core ballast rather than a yield hunt.
• Rate risk comes as it comes. The index gets tracked whether yields rise or fall, with no manager stepping in to shorten duration.
• The same index is sold by SPAB, SCHZ and BBAG at the same 0.03%. The portfolio is the commodity here; scale and trading depth are the tiebreakers.

• BNDC The index giants are far cheaper: AGG, BND, SCHZ and SPAB each charge 0.03%. That gap is the price of having someone make the allocation calls.
• The waiver caps the fund's own operating expenses but excludes acquired fund fees, so the underlying ETFs' costs sit on top.flexshares.com
• Thinly traded next to the category's household names, so the spread between buy and sell prices can matter as much as the expense ratio.

Full AGG profile⁠

Full BNDC profile⁠