TMBvsIMTBETF Comparison
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Thornburg Multi Sector Bond ETF (TMB) belongs to the Intl Aggregate Bonds segment. iShares Core 5-10 Year USD Bond ETF (IMTB) is part of the US Aggregate Bonds segment. TMB's top 3 sector exposures are Sovereign, Finance and Industrials. In contrast, IMTB's top sector exposures are Sovereign, Industrials and Non-Corporate. TMB is more expensive with a Total Expense Ratio (TER) of 0.55%, versus 0.07% for IMTB. TMB is up 0.62% year-to-date (YTD) with +$187M in YTD flows. IMTB performs worse with -0.41% YTD performance, and +$4M in YTD flows. Run a side-by-side ETF comparison of TMB and IMTB 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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TMB vs IMTB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/01/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | TMB IMTB | +0.02%-0.21% | -0.16%-0.90% | +0.62%-0.41% | +2.76%+2.30% | n/a+15.61% | n/a+1.01% |
| Flows | TMB IMTB | +$24M- | +$77M- | +$187M+$4M | +$189M+$26M | -+$84M | -+$158M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | TMB IMTB | +2.58%+4.28% | +2.47%+3.94% | n/a+5.39% | n/a+6.19% |
| Max drawdown | TMB IMTB | -0.97%-1.75% | -1.82%-2.88% | n/a-5.03% | n/a-18.13% |
| Max drawdown duration | TMB IMTB | 64d64d | 184d184d | n/a280d | n/a1452d |
Trading data
TMB | IMTB | |
Last sale 9/2/2026 at 1:30 PM | $25.12 | $42.64 |
| Previous close 09/01/2026 | $25.11 | $42.60 |
| Consolidated volume 09/01/2026 | ||
| 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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TMB
is actively managed and doesn’t replicate an indexTMB | IMTB | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/2/2026 at 1:30 PM
Live
Closed
TMB | IMTB | |
|---|---|---|
| Last price | $25.12 | $42.64 |
| 1D performance | +0.02% | +0.10% |
| AuM | $258.94 M | $272.76 M |
| E/R | 0.55% | 0.07% |
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Exposure
Countries
TMB
USA
60.67%
Other
39.33%
IMTB
USA
63.31%
Other
36.69%
Sectors
TMB
Sovereign
20.69%
Finance
12.73%
Industrials
8.03%
Other
58.56%
IMTB
Sovereign
24.95%
Industrials
13.03%
Non-Corporate
10.19%
Finance
10.09%
Other
41.75%
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Diversification
TMB
Total weight of top 15 holdings out of 15
24.04%
IMTB
Total weight of top 15 holdings out of 15
23.24%
Top 15 holdings
Data as of July 31, 2026
TMB
USA, Notes 4% 15nov2035, USD (F-2035)
9.88%
USA, Notes 4.25% 30jun2033, USD (M-2033)
3.84%
USA, Bonds 3% 15nov2044, USD
1.48%
USA, Notes 3.75% 31aug2031, USD (P-2031)
1.48%
FN MA5497, 5.5% 1oct2054, USD (ABS)
1.04%
US31418D3H34
1.01%
US912803HV84
0.80%
USA, Notes 4.375% 15may2036, USD (C-2036)
0.77%
FR SD8178, 2.5% 1nov2051, USD (ABS)
0.72%
USA, TIPS 0.125% 15feb2051, USD
0.64%
USA, STRIPS 0% 15may2042, USD (10957D)
0.56%
Thornburg Capital Management Fund
0.53%
US3140XRWW19
0.45%
US142921AG08
0.43%
US3136BX3N21
0.42%
IMTB
BlackRock Cash Funds - Institutional
10.15%
USA, Notes 4.375% 15may2034, USD (C-2034)
1.19%
USA, Notes 4.25% 15aug2035, USD (E-2035)
1.16%
USA, Notes 4% 15nov2035, USD (F-2035)
1.11%
USA, Notes 4.625% 15feb2035, USD (B-2035)
1.03%
US01F0206874
0.93%
USA, Notes 2.875% 15may2032, USD (C-2032)
0.92%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.91%
USA, Notes 4% 15feb2034, USD (B-2034)
0.86%
USA, Notes 1.25% 15aug2031, USD (E-2031)
0.85%
US31418EDB39
0.85%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.82%
US3140XLFE34
0.82%
USA, Notes 4.5% 15nov2033, USD (F-2033)
0.82%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.82%
Frequently asked questions about TMB and IMTB
How have the TMB and IMTB ETFs performed in 2026?
As of September 1, 2026, TMB is up 0.62% year-to-date (YTD), while IMTB has lost -0.41%. That puts TMB better performer ahead so far this year.
Which ETF is attracting more investor money: TMB or IMTB?
Year-to-date, the TMB ETF saw +$187M in flows, compared to +$4M for IMTB.
Which ETF is more volatile: TMB or IMTB?
Over the past year, TMB had a volatility of 2.47%, while IMTB experienced 3.94%.
Which ETF is bigger: TMB or IMTB?
As of September 1, 2026, TMB holds $258.94 M in assets under management (AUM), while IMTB manages $272.76 M.
What sectors do the TMB and IMTB ETFs invest in?
TMB leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, IMTB focuses on Sovereign, Industrials and Non-Corporate.
What are the top holdings of the TMB ETF and IMTB ETF?
TMB top holdings include USA, Notes 4% 15nov2035, USD (F-2035), USA, Notes 4.25% 30jun2033, USD (M-2033) and USA, Bonds 3% 15nov2044, USD. IMTB holds in its top three: BlackRock Cash Funds - Institutional, USA, Notes 4.375% 15may2034, USD (C-2034) and USA, Notes 4.25% 15aug2035, USD (E-2035).
Which ETF is more diversified: TMB or IMTB?
TMB holds 604 securities with 24.04% of its assets in the top 15. IMTB has 3452 securities and a top 15 weight of 23.24%.
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