AGGS vs SPAB

AGGSCHarbor Disciplined Bond ETF (AGGS)

SPABAState Street SPDR Portfolio Aggregate Bond ETF

In short

AGGS Harbor hands the keys to Income Research + Management, a Boston bond boutique whose day job is institutional money, and lets it run an active core bond book at a price near the middle of an index-dominated pack.

SPAB A 2007-vintage core bond fund priced at 0.03%: roughly 8,500 US investment-grade bonds in one ticket, at the same rock-bottom fee the household names charge for the same index.

Stated mandate

AGGS The Fund seeks total return.

SPAB The fund seeks to track the price and yield performance of the Bloomberg U.S. Aggregate Bond Index before fees and expenses, providing broad exposure to U.S.-dollar-denominated investment-grade bonds.

Why people hold it

• AGGS Subadvised since its 2024 launch by Income Research + Management, an independent fixed income firm that manages bond portfolios for institutional and private clients.sec.govharborcapital.com
• At 0.35%, it charges about what the typical aggregate-bond ETF does, which is unusual for a portfolio picked bond by bond rather than copied from an index.
• Pays monthly across roughly 200 positions, so income lands on a steady cadence instead of quarterly lumps.
• Stays in its lane: total return from a diversified book of mostly US dollar bonds, matching what the prospectus describes.

• SPAB 0.03% a year against a 0.36% median for its peer group, and the same ticket price as AGG, SCHZ and BBAG on the identical index.
• Roughly 8,500 dollar-denominated investment-grade bonds in one line item, tracking the Bloomberg U.S. Aggregate Bond Index. Diversification you could not assemble bond by bond.ssga.com
• Trades actively and has tracked its index closely, putting it among the stronger implementations in the core-bond group.
• Running since 2007, now a multi-billion-dollar fund, and it pays monthly rather than quarterly.

Worth knowing

• AGGS Thinly traded on a small asset base, so bid-ask spreads can run wider than the giant index bond funds.
• Index rivals BND, SPAB and SCHZ charge 0.03%, so the active work here starts with a real fee gap to make up.
• Launched in 2024, so the track record is short and covers a narrow slice of rate history.

• SPAB Bond prices move opposite yields. When rates rise the index falls and the fund follows it down; a 0.03% fee cannot cushion that.
• AGG, SCHZ and BBAG hold the same declared index at the same 0.03%. Picking among them comes down to spreads and platform, not the portfolio.
• Investment grade and US dollar only by mandate: high yield and foreign-currency debt sit outside the remit.ssga.com

Full AGGS profile⁠

Full SPAB profile⁠