AGG vs CORB: Grades, Fees and Holdings Compared

iShares Core U.S. Aggregate Bond ETF

AGGANYSE Arca

AB Core Bond ETF

CORBBNYSE Arca

Overlap

No data

Expense ratio

AGG −0.25pt a year

AGG0.03%CORB0.28%

Avg volume · 30D

AGG 85.2×the volume

AGG9.95MCORB117K

AGG vs CORB Performance

Dec 31, 2025 – Oct 30, 2026

−0.6%AGG−1.1%CORB

Expense ratio: AGG 0.03%, better; CORB 0.28%
Fund size: AGG $140B; CORB $1.19B
1Y total return: AGG −0.2%; CORB No data
Yield (12M): AGG 4.12%; CORB No data
Holdings: AGG 13428; CORB 724
Avg volume (30D): AGG 9.95M sh, better; CORB 117K sh
NAV per share: AGG $96.45; CORB $28.70
52W range

ETF.net Grade

Pillar letters and Scores for AGG, CORB, with each pillar’s weight
Pillar	AGG	CORB
Cost30% weight	A97Higher	B59
Mission25% weight	A100	A100
Risk15% weight	C47Higher	D26
Tradability15% weight	A94Higher	B61
Holdings10% weight	A77Higher	C42
Durability5% weight	A95Higher	C43

Rank among US Aggregate Bond funds

How we build Categories ›

Same Category. AGG and CORB are both graded against the same 114 US Aggregate Bond funds, so their Grades compare head to head.

US Aggregate Bond⁠

Category · 114 funds

See all 114 ›

AGG ranks 1st and CORB 54th of 114 funds in the US Aggregate Bond Category.

Rank 1AAGGiShares Core U.S. Aggregate Bond ETFScore 87
Rank 2AIUSBiShares Core Universal USD Bond ETFScore 86
Rank 51BVCOBVoya Core Bond ETFScore 63
Rank 54BCORBAB Core Bond ETFScore 62
Rank 54BTOTRT. Rowe Price Total Return ETFScore 62

Our read on each fund

ETF.net Research

AGGAiShares Core U.S. Aggregate Bond ETF

CORBBAB 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.

CORB No data

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.

CORB No data

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.

CORB No data

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.

CORB No data

Full AGG profile⁠

Full CORB profile⁠

AGG vs CORB Holdings

How AGG and CORB differ

No overlap figure

Two bond funds rarely hold the same issues.

Level by level

Sector22 Sectors0.0%
Countryby domicile95.7%
Asset classFixed Income100%

Sector

Sector weights in AGG and CORB, widest gap first
Sector	More in AGGMore in CORB	AGG	CORB
Treasury	AGG +47.1 points	47.1%	0.0%
Technology	CORB +37.9 points	0.0%	37.9%
MBS Pass-Through	AGG +23.0 points	23.0%	0.0%
Industrial	AGG +14.4 points	14.4%	0.0%
Financials	CORB +11.7 points	0.0%	11.7%
Communication	CORB +10.0 points	0.0%	10.0%
Consumer Discretionary	CORB +9.6 points	0.0%	9.6%
Health Care	CORB +9.1 points	0.0%	9.1%
Industrials	CORB +8.4 points	0.0%	8.4%
Financial Institutions	AGG +8.1 points	8.1%	0.0%
Consumer Staples	CORB +4.6 points	0.0%	4.6%
Energy	CORB +3.0 points	0.0%	3.0%
Utility	AGG +2.5 points	2.5%	0.0%
Utilities	CORB +2.3 points	0.0%	2.3%
Real Estate	CORB +1.9 points	0.0%	1.9%
Materials	CORB +1.7 points	0.0%	1.7%
CMBS	AGG +1.4 points	1.4%	0.0%
Sovereign	AGG +1.1 points	1.1%	0.0%
Supranational	AGG +0.9 points	0.9%	0.0%
Local Authority	AGG +0.6 points	0.6%	0.0%
Agency	AGG +0.5 points	0.5%	0.0%
ABS	AGG +0.4 points	0.4%	0.0%

Country, concentration and asset class

Country by domicile

Country weights in AGG and CORB, widest gap first
Country	More in AGGMore in CORB	AGG	CORB
United States	CORB +4.0 points	94.8%	98.8%
Canada	AGG +1.0 points	1.0%	0.0%
Japan	AGG +0.5 points	0.5%	0.0%
Other countries (27)	AGG +2.4 points	3.6%	1.2%

Concentration

Weight in the 10 largest Holdings

AGG6.5%
CORB30.3%

Securities held

AGG12,534
CORB716

Asset class

AGG: Fixed Income
CORB: Fixed Income

Holdings

Two bond funds rarely hold the same issues, so this page lists no shared Holdings. AGG holds 12,534 securities, CORB 716.

All 13,484 AGG holdings⁠All 715 CORB holdings⁠

How we measure overlap

Each holding counts at its smaller weight in the two funds, summed over the full Holdings. Sector, country and asset class use the same rule on each fund’s split. Cash, FX and derivative lines stay out of the counts. Two bond funds get no overlap figure.

AGG vs CORB Cost

Overpaying CORB vs AGG

$5,117

On $10,000 over 30 years. 7% growth a year before fees, expense ratio only.

AGG 0.03%
$638
CORB 0.28%
$5,755

Amount$10,000

Years30 years

Cost over time

AGG 0.03%
CORB 0.28%
Overpaying

Year by year

Year	AGG	CORB	Overpaying
10	$55	$509	$454
20	$216	$1,976	$1,760
30	$638	$5,755	$5,117

Expense ratio

0.03%AGG, cheaper
0.28%CORB

AGG0.03%CORB0.28%

0.00%1.04%

Middle half of US Aggregate Bond funds
Median 0.34%

AGG 2nd cheapest of 114 funds

CORB 46th cheapest of 114 funds

AGG vs CORB Dividends

Last 12 months to Oct 30, 2026

Yield (12M): AGG 4.12%; CORB No data
Payout (12M): AGG $3.97; CORB No data
Last payment: AGG $0.33; CORB $0.09
Ex-dividend: AGG Oct 1, 2026; CORB Oct 1, 2026
Paid on: AGG Oct 6, 2026; CORB Oct 6, 2026
Frequency: AGG Monthly; CORB Monthly

Distribution history

Per share, 2023 to 2026, same scale for both

AGGMonthly · 45 paymentsAll AGG payments⁠

CORBMonthly · 11 paymentsAll CORB payments⁠

AGG vs CORB Risk

Fall from peak · 5 years

This chart needs five years of history for both funds.

Risk facts

VolatilityStd dev, 3 years: AGG 5.6%CORB No data
Return per unit of riskSharpe ratio, 3 years: AGG 0.17CORB No data
Worst fallMax drawdown, 5 years: AGG −17.3%CORB No data
Market sensitivityBeta, 5 years: AGG 0.99CORB 0.08; Market = 1

AGG and CORB in the news

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AGG vs CORB

In short

Stated mandate

Why people hold it