Guide · US Corporate Bond
Best investment-grade corporate bond ETFs
A corporate bond fund holds debt issued by companies rather than governments. Investment-grade means every bond carries a credit rating of BBB-/Baa3 or better from the major agencies — in practice the index funds here are dominated by A and BBB issuers. Corporates yield more than Treasuries of the same maturity because the market demands compensation for default risk, downgrade risk, and thinner liquidity; that gap is the credit spread, and harvesting it is the entire reason a dedicated corporate fund exists. The catalog funds slice the market by maturity band — short, intermediate, long, or the whole spectrum in one fund.
How the scoring ranks these funds
Cost and liquidity drive the ordering. Vanguard's three maturity-band funds charge 3 basis points and the SPDR Portfolio and iShares equivalents charge 4, so the top of the table is a near-tie decided by AUM and concentration. LQD — the oldest and most heavily traded fund in the category — sits lower because its 14 bps fee is several times the going rate for the same exposure. The two convertible bond funds (ICVT, CWB) share the category but are a different instrument; see the closing notes.
See the methodology for the full formula behind each sub-score.
Top picks
-
89
composite / 100
Vanguard's short-term corporate fund, tracking the Bloomberg US 1-5 Year Corporate Bond Index. 3 bps, ~$52B in AUM, roughly 2,900 holdings. The short maturity band keeps rate sensitivity low, which makes this the mildest expression of corporate credit in the catalog.
- Expense
- 0.030%
- AUM
- $51.79B
- Issuer
- Vanguard
- Detail
- VCSH page →
-
89
composite / 100
Vanguard's intermediate fund (Bloomberg US 5-10 Year Corporate Bond Index) and the largest fund in the category at ~$69B. 3 bps. The 5-10 year band is the conventional middle of the credit curve and the most common single-fund corporate holding.
- Expense
- 0.030%
- AUM
- $69.44B
- Issuer
- Vanguard
- Detail
- VCIT page →
-
89
composite / 100
The long end of Vanguard's maturity ladder — Bloomberg US 10+ Year Corporate Bond Index, 3 bps. The highest trailing yield in the category's investment-grade set (5.1% TTM), paid for with substantially more interest-rate sensitivity than the short and intermediate funds.
- Expense
- 0.030%
- AUM
- $10.06B
- Issuer
- Vanguard
- Detail
- VCLT page →
-
81
composite / 100
Vanguard's whole-spectrum corporate fund — it holds the full Bloomberg US Corporate Bond Index (~4,800 bonds) rather than one maturity band, effectively combining VCSH, VCIT, and VCLT at market weights. Same 3 bps fee; scores lower than the band funds mainly because its ~$1.8B AUM is a fraction of theirs.
- Expense
- 0.030%
- AUM
- $1.76B
- Issuer
- Vanguard
- Detail
- VTC page →
-
85
composite / 100
The original corporate bond ETF and still among the largest at ~$33B. Tracks the Markit iBoxx USD Liquid Investment Grade Index, which screens for tradability. Its 14 bps fee is what the composite penalizes; its deep options market and tight spreads are what keep institutional flow in it anyway.
- Expense
- 0.14%
- AUM
- $33.11B
- Issuer
- iShares
- Detail
- LQD page →
Also in the category
Other funds in the same category, ranked by composite score.
How the maturity bands differ
Longer bands carry higher trailing yields — on the Vanguard trio, roughly 4.1% short, 4.4% intermediate, 5.1% long as of the current data — and proportionally more sensitivity to interest-rate moves. A long fund like VCLT behaves much more like a rate instrument than a credit instrument day to day. The band edges are not identical across issuers: VCSH and IGSB hold 1-5 year bonds while SPSB cuts off at 3 years, and SPIB spans the full 1-10 year intermediate range where VCIT and IGIB hold 5-10. The cross-issuer funds at each band track different index families with genuinely different coverage at near-identical fees — the usual line of argument for tax-loss-harvesting pairs.
Account placement
Corporate bond interest is taxed at ordinary-income rates — there is no qualified-dividend treatment and, unlike Treasuries, no state-tax exemption. That makes corporate funds among the least tax-efficient holdings in the catalog per unit of yield, and the standard placement pattern is to hold them in tax-advantaged accounts (IRA, 401k) when space allows. The muni-bond guide covers the alternative arithmetic for high-bracket taxable accounts.
Overlap with aggregate funds
An aggregate fund like BND or AGG already holds the investment-grade corporate market as one of its sleeves, alongside Treasuries and mortgage-backed securities. A dedicated corporate fund is therefore an overweight on credit relative to the aggregate, not a separate asset class — which is also why none of the classic lazy portfolios on this site carry a standalone corporate position; they take their credit exposure through the aggregate fund or skip it for Treasuries. The compare pages (e.g. VCIT vs BND) show the sector and duration differences directly.
The convertible funds are a different instrument
ICVT and CWB sit in this category but hold convertible bonds — corporate debt with an embedded option to exchange into the issuer's stock. Their trailing yields (~1.3%) and return behavior look more like equity than like the rest of this table, and their fees (20 and 40 bps) reflect a niche index. They are not interchangeable with the investment-grade funds above.
Common questions
- Why do corporate bond funds yield more than Treasury funds?
- Corporate issuers can default and can be downgraded, and their bonds trade less liquidly than Treasuries, so the market prices them at a yield premium — the credit spread. The spread widens in recessions and credit scares, which is also when corporate funds fall while Treasury funds tend to rally. The extra yield is compensation for taking on equity-correlated risk, not free income.
- What does investment-grade actually mean?
- A rating of BBB-/Baa3 or higher from the major credit agencies. The investment-grade index funds in this category hold only bonds above that line; the two convertible funds (ICVT, CWB) are the exception, since convertible indexes are not screened on rating. Below the line is the high-yield (junk) market, which the investment-grade funds exclude by mandate. In practice the largest weight in broad investment-grade indexes sits in the A and BBB tiers — a downgrade from BBB to junk forces the bond out of the index, which is the main credit event these funds are exposed to.
Guide. Picks come from the live PlainIndex composite for this category; editorial commentary on each pick is hand-written. Re-pulled with every catalog refresh.
PlainIndex publishes data and editorial commentary — nothing here is personalized investment advice. Read the methodology for how the scores referenced here are computed.