BTOTvsSPABETF Comparison
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iShares Total USD Fixed Income Market ETF (BTOT) and State Street SPDR Portfolio Aggregate Bond ETF (SPAB) belong to the same industry segment: US Aggregate Bonds. Both ETFs have the same top 3 sector exposures: Sovereign, Finance and Industrials. BTOT is more expensive with a Total Expense Ratio (TER) of 0.1%, versus 0.03% for SPAB. BTOT is up 0.23% year-to-date (YTD) with +$5M in YTD flows. SPAB performs worse with -0.23% YTD performance, and +$1.16B in YTD flows. Run a side-by-side ETF comparison of BTOT and SPAB 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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BTOT vs SPAB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 08/28/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | BTOT SPAB | +0.04%+0.39% | -0.30%-0.60% | +0.23%-0.23% | n/a+2.14% | n/a+12.74% | n/a-1.53% |
| Flows | BTOT SPAB | -+$467M | +$5M+$697M | +$5M+$1.16B | -+$1.85B | -+$3.52B | -+$5.04B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | BTOT SPAB | +3.47%+3.94% | n/a+3.69% | n/a+5.09% | n/a+5.95% |
| Max drawdown | BTOT SPAB | -1.49%-1.72% | n/a-2.76% | n/a-4.87% | n/a-17.87% |
| Max drawdown duration | BTOT SPAB | 60d63d | n/a183d | n/a284d | n/a1626d |
Trading data
BTOT | SPAB | |
Last sale 9/1/2026 at 1:30 PM | $48.57 | $24.94 |
| Previous close 08/31/2026 | $48.86 | $25.10 |
| Consolidated volume 08/31/2026 | ||
| 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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BTOT | SPAB | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/1/2026 at 1:30 PM
Live
Closed
BTOT | SPAB | |
|---|---|---|
| Last price | $48.57 | $24.94 |
| 1D performance | -0.60% | -0.64% |
| AuM | $29.31 M | $10.22 B |
| E/R | 0.1% | 0.03% |
Characteristics
BTOT | SPAB | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | iShares | State Street Investment Management |
| Benchmark | Bloomberg US Total Fixed Income Market Index | Bloomberg US Aggregate Bond Index |
| N° of holdings | 1001 | 7063 |
| Asset class | - | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | December 10, 2025 | May 23, 2007 |
| ESG | No | No |
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Exposure
Countries
BTOT
USA
76.56%
Other
23.44%
SPAB
USA
75.76%
Other
24.24%
Sectors
BTOT
Sovereign
44.98%
Finance
11.87%
Other
43.15%
SPAB
Sovereign
46.7%
Finance
10.36%
Industrials
9.6%
Other
33.34%
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Diversification
BTOT
Total weight of top 15 holdings out of 15
19.36%
SPAB
Total weight of top 15 holdings out of 15
6.21%
Top 15 holdings
Data as of July 31, 2026
BTOT
BlackRock Cash Funds - Institutional
5.64%
US31418EB825
1.92%
FR SD8212, 2.5% 1may2052, USD (ABS)
1.32%
USA, Notes 3.875% 31jul2027, USD (BE-2027)
1.08%
Benchmark Mortgage Trust 2025-V18, 5.18365% 18oct2058, USD (ABS, A3)
1.03%
USA, Notes 4.875% 31oct2030, USD (R-2030)
0.93%
USA, Notes 3.625% 31aug2027, USD (BG-2027)
0.86%
US3140XPXH76
0.86%
USA, Notes 3.375% 15sep2027, USD (AS-2027)
0.86%
US01F0204895
0.85%
USA, Notes 4% 31jul2032, USD (N-2032)
0.85%
USA, Notes 4% 30apr2032, USD (K-2032)
0.84%
US01F0326821
0.84%
USA, Notes 1.875% 15feb2032, USD (B-2032)
0.75%
US31418EDD94
0.74%
SPAB
USA, Notes 3.5% 15dec2028, USD (AV-2028)
0.77%
USA, Notes 4% 15nov2035, USD (F-2035)
0.46%
USA, Notes 4.375% 30nov2028, USD (AG-2028)
0.43%
USA, Notes 3.5% 31jan2028, USD (U-2028)
0.42%
USA, Notes 3.875% 31mar2031, USD (W-2031)
0.41%
USA, Notes 3.375% 31dec2027, USD (BM-2027)
0.39%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.39%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.38%
USA, Notes 4.375% 15may2036, USD (C-2036)
0.38%
US01F0526800
0.38%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.36%
USA, Notes 3.875% 15aug2033, USD (E-2033)
0.36%
USA, Notes 4.5% 15nov2033, USD (F-2033)
0.36%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.36%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.36%
Frequently asked questions about BTOT and SPAB
How have the BTOT and SPAB ETFs performed in 2026?
As of August 28, 2026, BTOT is up 0.23% year-to-date (YTD), while SPAB has lost -0.23%. That puts BTOT better performer ahead so far this year.
Which ETF is attracting more investor money: BTOT or SPAB?
Year-to-date, the BTOT ETF saw +$5M in flows, compared to +$1.16B for SPAB.
Which ETF is bigger: BTOT or SPAB?
As of August 28, 2026, BTOT holds $29.31 M in assets under management (AUM), while SPAB manages $10.22 B.
What sectors do the BTOT and SPAB ETFs invest in?
BTOT leans toward sectors like Sovereign and Finance. Meanwhile, SPAB focuses on Sovereign, Finance and Industrials.
What are the top holdings of the BTOT ETF and SPAB ETF?
BTOT top holdings include BlackRock Cash Funds - Institutional, US31418EB825 and FR SD8212, 2.5% 1may2052, USD (ABS). SPAB holds in its top three: USA, Notes 3.5% 15dec2028, USD (AV-2028), USA, Notes 4% 15nov2035, USD (F-2035) and USA, Notes 4.375% 30nov2028, USD (AG-2028).
Which ETF is more diversified: BTOT or SPAB?
BTOT holds 1055 securities with 19.36% of its assets in the top 15. SPAB has 8468 securities and a top 15 weight of 6.21%.
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