AGGvsIUSBETF Comparison
VS
iShares Core U.S. Aggregate Bond ETF (AGG) belongs to the Intl IG Bonds segment. iShares Core Total USD Bond Market ETF (IUSB) is part of the US Aggregate Bonds segment. AGG's top 3 sector exposures are Sovereign, Other sectors and Banks. In contrast, IUSB's top sector exposures are Sovereign, Banks and Non-Corporate. AGG is less expensive with a Total Expense Ratio (TER) of 0.03%, versus 0.06% for IUSB. AGG is down -0.01% year-to-date (YTD) with +$5.57B in YTD flows. IUSB performs better with 0.12% YTD performance, and +$9.47B in YTD flows. Run a side-by-side ETF comparison of AGG and IUSB below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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AGG vs IUSB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 07/28/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | AGG IUSB | -1.13%-1.08% | -0.44%-0.35% | -0.01%+0.12% | +3.59%+3.79% | +12.40%+13.92% | -1.39%+0.47% |
| Flows | AGG IUSB | +$1.07B+$984M | +$4.38B+$7.11B | +$5.57B+$9.47B | +$11.35B+$10.44B | +$44.32B+$21.11B | +$64.08B+$31.14B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | AGG IUSB | +4.02%+3.82% | +3.69%+3.46% | +5.13%+4.80% | +5.89%+5.51% |
| Max drawdown | AGG IUSB | -1.70%-1.61% | -2.73%-2.51% | -5.32%-5.10% | -17.86%-17.91% |
| Max drawdown duration | AGG IUSB | 29d29d | 149d149d | 122d120d | 1667d1492d |
Trading data
AGG | IUSB | |
Last sale 7/29/2026 at 1:30 PM | $97.55 | $45.51 |
| Previous close 07/28/2026 | $97.92 | $45.65 |
| Consolidated volume 07/28/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of June 30, 2026
1-year trailing difference
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AGG | IUSB | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 7/29/2026 at 1:30 PM
Live
Closed
AGG | IUSB | |
|---|---|---|
| Last price | $97.55 | $45.51 |
| 1D performance | -0.38% | -0.31% |
| AuM | $138.17 B | $43.17 B |
| E/R | 0.03% | 0.06% |
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Exposure
Countries
AGG
USA
58.52%
Other
41.48%
IUSB
USA
53.42%
Other
46.58%
Sectors
AGG
Sovereign
33.26%
Other
66.74%
IUSB
Sovereign
29.15%
Other
70.85%
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Diversification
AGG
Total weight of top 15 holdings out of 15
8.45%
IUSB
Total weight of top 15 holdings out of 15
9.05%
Top 15 holdings
Data as of June 30, 2026
AGG
BlackRock Cash Funds - Institutional
2.97%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.42%
US91282CPZ85
0.41%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.41%
USA, Notes 4% 28feb2030, USD (H-2030)
0.41%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.40%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.40%
USA, Notes 4.5% 15nov2033, USD (F-2033)
0.39%
US91282CNT44
0.39%
US91282CNC19
0.39%
USA, Notes 4% 15feb2034, USD (B-2034)
0.38%
US91282CPJ44
0.38%
US91282CNM90
0.37%
US91282CNU17
0.37%
US91282CNH06
0.36%
IUSB
BlackRock Liquidity TempCash
4.15%
US01F0206791
0.38%
USA, Notes 4.375% 31dec2029, USD (AH-2029)
0.38%
US91282CQQ77
0.38%
USA, Notes 4% 15feb2034, USD (B-2034)
0.37%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.36%
US91282CNT44
0.36%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.35%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.34%
US91282CNC19
0.34%
USA, Notes 2.75% 15aug2032, USD (E-2032)
0.34%
US91282CPZ85
0.33%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.33%
US01F0526727
0.32%
US91282CPJ44
0.32%
Frequently asked questions about AGG and IUSB
How have the AGG and IUSB ETFs performed in 2026?
As of July 28, 2026, AGG is down -0.01% year-to-date (YTD), while IUSB has returned 0.12%. That puts IUSB better performer ahead so far this year.
Which ETF is attracting more investor money: AGG or IUSB?
Year-to-date, the AGG ETF saw +$5.57B in flows, compared to +$9.47B for IUSB.
Which ETF is more volatile: AGG or IUSB?
Over the past year, AGG had a volatility of 3.69%, while IUSB experienced 3.46%.
Which ETF is bigger: AGG or IUSB?
As of July 28, 2026, AGG holds $138.17 B in assets under management (AUM), while IUSB manages $43.17 B.
What sectors do the AGG and IUSB ETFs invest in?
AGG leans toward sectors like Sovereign. Meanwhile, IUSB focuses on Sovereign.
What are the top holdings of the AGG ETF and IUSB ETF?
AGG top holdings include BlackRock Cash Funds - Institutional, USA, Notes 4.625% 15feb2035, USD (B-2035) and US91282CPZ85. IUSB holds in its top three: BlackRock Liquidity TempCash, US01F0206791 and USA, Notes 4.375% 31dec2029, USD (AH-2029).
Which ETF is more diversified: AGG or IUSB?
AGG holds 13164 securities with 8.45% of its assets in the top 15. IUSB has 17892 securities and a top 15 weight of 9.05%.
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