BBBS vs IGSB

BBBSCBondBloxx BBB Rated 1-5 Year Corporate Bond ETF

IGSBAiShares 1-5 Year Investment Grade Corporate Bond ETF

In short

BBBS Most investment-grade bond funds blend AAA down to BBB. BBBS takes only the bottom rung, BBB rated corporates, and caps maturities under five years. A ratings dial you set yourself, not a grab bag.

IGSB Corporate credit with the rate risk dialed down: roughly 4,700 investment-grade bonds, none maturing past five years, for four basis points. iShares has run it since 2007.

Stated mandate

BBBS The Fund seeks to track the Bloomberg US Corporate BBB 1-5 Year Index, which represents taxable, fixed-rate, U.S. dollar-denominated BBB corporate bonds with remaining maturities from one to less than five years.

IGSB The fund seeks to track an index containing U.S. dollar-denominated investment-grade corporate bonds with remaining maturities from one through five years.

Why people hold it

• BBBS One job, done narrowly: the index covers taxable, fixed-rate, dollar-denominated BBB corporate bonds maturing in one to under five years. Credit tier and maturity are both pinned down.
• Short maturities mean far less rate sensitivity than long-dated corporate funds, and the basket spreads across many issuers rather than leaning on a handful.
• Sits in the upper half of a crowded investment-grade corporate field of dozens of ETFs, and it tracks its stated Bloomberg index closely.

• IGSB Four basis points a year, a fraction of the typical investment-grade corporate bond fund's fee and level with the cheapest tier of its peer group.
• One-to-five-year maturities mean prices move less when rates move than long-dated corporate funds. Same corporate credit, shorter leash.ishares.com
• Thousands of individual bonds tracking the ICE BofA 1-5 Year US Corporate Index, with income paid monthly.ishares.com
• Trading since 2007, actively traded, and one of the strongest builds in the investment-grade corporate group on cost, portfolio and execution.

Worth knowing

• BBBS The 0.19% fee is typical for investment-grade corporate ETFs, but broad short-term peers like IGSB and SPIB charge a small fraction of that for a wider credit mix.
• BBB is the last rung before high yield. Isolating it means more credit sensitivity than an all-grade fund that dilutes with AAA and AA paper.
• A small, thinly traded fund launched in 2024, so spreads can run wider than at the giants and distributions have not settled into a fixed rhythm.

• IGSB Short maturities cut both ways: less price damage when rates rise, less lift when they fall.
• These are company bonds, not Treasuries. Investment grade, but credit spreads can widen and prices move with them.
• Only the front of the curve. Sibling IGIB runs 5-10 years and USIG spans broad maturities, both at the same fee.

Full BBBS profile⁠

Full IGSB profile⁠