IBTOvsIBGBETF Comparison
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iShares iBonds Dec 2033 Term Treasury ETF (IBTO) and iShares iBonds Dec 2045 Term Treasury ETF (IBGB) belong to the same industry segment: US Government Bonds. Both ETFs have the same top 2 sector exposures: Sovereign and Non-Corporate. Both IBTO and IBGB have the same Total Expense Ratio (TER) of 0.07%. IBTO is down -1.13% year-to-date (YTD) with +$70M in YTD flows. IBGB performs worse with -2.28% YTD performance, and +$2M in YTD flows. Run a side-by-side ETF comparison of IBTO and IBGB 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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IBTO vs IBGB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/03/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IBTO IBGB | -0.22%+0.33% | -0.58%-1.86% | -1.13%-2.28% | +0.29%+0.09% | +10.80%n/a | n/an/a |
| Flows | IBTO IBGB | +$24M- | +$32M- | +$70M+$2M | +$113M+$5M | +$463M- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IBTO IBGB | +4.21%+8.32% | +4.17%+8.06% | +6.28%n/a | n/an/a |
| Max drawdown | IBTO IBGB | -1.68%-4.81% | -3.64%-6.80% | -6.89%n/a | n/an/a |
| Max drawdown duration | IBTO IBGB | 66d66d | 186d186d | 318dn/a | n/an/a |
Trading data
IBTO | IBGB | |
Last sale 9/4/2026 at 1:30 PM | $23.59 | $23.40 |
| Previous close 09/03/2026 | $23.61 | $23.40 |
| Consolidated volume 09/03/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of September 5, 2026
1-year trailing difference
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IBTO | IBGB | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/4/2026 at 1:30 PM
Live
Closed
IBTO | IBGB | |
|---|---|---|
| Last price | $23.59 | $23.40 |
| 1D performance | -0.10% | +0.01% |
| AuM | $483.99 M | $9.35 M |
| E/R | 0.07% | 0.07% |
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Exposure
Countries
IBTO
USA
100%
Other
0%
IBGB
USA
100%
Sectors
IBTO
Sovereign
99.97%
Other
0.03%
IBGB
Sovereign
99.99%
Other
0.01%
Diversification
IBTO
Total weight of top 11 holdings out of 11
100%
IBGB
Total weight of top 9 holdings out of 9
100%
Top 15 holdings
Data as of July 31, 2026
IBTO
USA, Notes 4.5% 15nov2033, USD (F-2033)
17.44%
USA, Notes 3.875% 15aug2033, USD (E-2033)
15.72%
USA, Notes 3.5% 15feb2033, USD (B-2033)
14.35%
USA, Notes 3.375% 15may2033, USD (C-2033)
13.86%
USA, Notes 4.25% 31mar2033, USD (J-2033)
7.69%
USA, Notes 4.25% 30jun2033, USD (M-2033)
6.48%
USA, Notes 3.75% 28feb2033, USD (H-2033)
6.41%
USA, Notes 4.25% 31may2033, USD (L-2033)
6.38%
USA, Notes 4% 31jan2033, USD (G-2033)
6.19%
USA, Notes 4.125% 30apr2033, USD (K-2033)
5.45%
BlackRock Cash Funds - Treasury
0.03%
IBGB
USA, Bonds 5% 15may2045, USD
18.85%
USA, Bonds 4.875% 15aug2045, USD
18.76%
USA, Bonds 4.75% 15feb2045, USD
18.48%
USA, Bonds 4.625% 15nov2045, USD
17.93%
USA, Bonds 2.5% 15feb2045, USD
10.20%
USA, Bonds 2.875% 15aug2045, USD
6.54%
USA, Bonds 3% 15may2045, USD
5.02%
USA, Bonds 3% 15nov2045, USD
4.20%
BlackRock Cash Funds - Treasury
0.01%
Frequently asked questions about IBTO and IBGB
How have the IBTO and IBGB ETFs performed in 2026?
As of September 3, 2026, IBTO is down -1.13% year-to-date (YTD), while IBGB has lost -2.28%. That puts IBTO better performer ahead so far this year.
Which ETF is attracting more investor money: IBTO or IBGB?
Year-to-date, the IBTO ETF saw +$70M in flows, compared to +$2M for IBGB.
Which ETF is more volatile: IBTO or IBGB?
Over the past year, IBTO had a volatility of 4.17%, while IBGB experienced 8.06%.
Which ETF is bigger: IBTO or IBGB?
As of September 3, 2026, IBTO holds $483.99 M in assets under management (AUM), while IBGB manages $9.35 M.
What sectors do the IBTO and IBGB ETFs invest in?
IBTO leans toward sectors like Sovereign. Meanwhile, IBGB focuses on Sovereign.
What are the top holdings of the IBTO ETF and IBGB ETF?
IBTO top holdings include USA, Notes 4.5% 15nov2033, USD (F-2033), USA, Notes 3.875% 15aug2033, USD (E-2033) and USA, Notes 3.5% 15feb2033, USD (B-2033). IBGB holds in its top three: USA, Bonds 5% 15may2045, USD, USA, Bonds 4.875% 15aug2045, USD and USA, Bonds 4.75% 15feb2045, USD.
Which ETF is more diversified: IBTO or IBGB?
IBTO has 11 securities and IBGB has 9 securities.
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