AGGvsIUSBETF Comparison
VS
iShares Core U.S. Aggregate Bond ETF (AGG) and iShares Core Total USD Bond Market ETF (IUSB) belong to the same industry segment: US Aggregate Bonds. Both ETFs have the same top 3 sector exposures: Sovereign, Finance and Industrials. AGG is less expensive with a Total Expense Ratio (TER) of 0.03%, versus 0.06% for IUSB. AGG is down -1.35% year-to-date (YTD) with +$7.29B in YTD flows. IUSB performs better with -1.08% YTD performance, and +$10.58B 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 09/11/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | AGG IUSB | -1.09%-1.03% | -1.90%-1.72% | -1.35%-1.08% | -0.75%-0.33% | +12.49%+14.05% | -2.62%-0.80% |
| Flows | AGG IUSB | +$1.31B+$771M | +$3.93B+$2.71B | +$7.29B+$10.58B | +$11.47B+$10.77B | +$45.68B+$22.08B | +$65.10B+$31.77B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | AGG IUSB | +3.90%+3.67% | +3.67%+3.46% | +5.05%+4.72% | +5.91%+5.53% |
| Max drawdown | AGG IUSB | -2.45%-2.26% | -3.11%-2.75% | -4.86%-4.33% | -17.79%-17.91% |
| Max drawdown duration | AGG IUSB | 74d74d | 194d194d | 284d280d | 1625d1492d |
Trading data
AGG | IUSB | |
Last sale 9/11/2026 at 1:30 PM | $95.98 | $44.79 |
| Previous close 09/10/2026 | $96.05 | $44.84 |
| Consolidated volume 09/10/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of August 31, 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 9/11/2026 at 1:30 PM
Live
Closed
AGG | IUSB | |
|---|---|---|
| Last price | $95.98 | $44.79 |
| 1D performance | -0.07% | -0.11% |
| AuM | $137.08 B | $43.42 B |
| E/R | 0.03% | 0.06% |
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Exposure
Countries
AGG
USA
77.45%
Other
22.55%
IUSB
USA
73.5%
Other
26.5%
Sectors
AGG
Sovereign
47.55%
Finance
10.22%
Industrials
7.11%
Other
35.12%
IUSB
Sovereign
43.13%
Finance
13.46%
Other
43.41%
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Diversification
AGG
Total weight of top 15 holdings out of 15
8.32%
IUSB
Total weight of top 15 holdings out of 15
9.25%
Top 15 holdings
Data as of July 31, 2026
AGG
BlackRock Cash Funds - Institutional
2.85%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.42%
USA, Notes 4% 28feb2030, USD (H-2030)
0.41%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.41%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.40%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.40%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.40%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.40%
USA, Notes 4.25% 15may2035, USD (C-2035)
0.39%
USA, Notes 4.5% 15nov2033, USD (F-2033)
0.39%
USA, Notes 4% 15feb2034, USD (B-2034)
0.39%
USA, Notes 4% 15nov2035, USD (F-2035)
0.38%
USA, Notes 3.875% 15jul2028, USD (AQ-2028)
0.36%
USA, Notes 3.875% 15jun2028, USD (AP-2028)
0.36%
USA, Notes 3.875% 15aug2033, USD (E-2033)
0.35%
IUSB
BlackRock Liquidity TempCash
4.35%
US01F0206874
0.42%
USA, Notes 4.375% 31dec2029, USD (AH-2029)
0.38%
USA, Notes 4.375% 15may2036, USD (C-2036)
0.37%
USA, Notes 4% 15feb2034, USD (B-2034)
0.37%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.35%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.35%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.34%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.34%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.34%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.34%
USA, Notes 4.25% 15may2035, USD (C-2035)
0.33%
USA, Notes 2.75% 15aug2032, USD (E-2032)
0.33%
USA, Notes 4% 15nov2035, USD (F-2035)
0.33%
US01F0426811
0.31%
Frequently asked questions about AGG and IUSB
How have the AGG and IUSB ETFs performed in 2026?
As of September 11, 2026, AGG is down -1.35% year-to-date (YTD), while IUSB has lost -1.08%. 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 +$7.29B in flows, compared to +$10.58B for IUSB.
Which ETF is more volatile: AGG or IUSB?
Over the past year, AGG had a volatility of 3.67%, while IUSB experienced 3.46%.
Which ETF is bigger: AGG or IUSB?
As of September 11, 2026, AGG holds $137.08 B in assets under management (AUM), while IUSB manages $43.42 B.
What sectors do the AGG and IUSB ETFs invest in?
AGG leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, IUSB focuses on Sovereign and Finance.
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 USA, Notes 4% 28feb2030, USD (H-2030). IUSB holds in its top three: BlackRock Liquidity TempCash, US01F0206874 and USA, Notes 4.375% 31dec2029, USD (AH-2029).
Which ETF is more diversified: AGG or IUSB?
AGG holds 13243 securities with 8.32% of its assets in the top 15. IUSB has 18026 securities and a top 15 weight of 9.25%.
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