SPABvsBTOTETF Comparison
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State Street SPDR Portfolio Aggregate Bond ETF (SPAB) and iShares Total USD Fixed Income Market ETF (BTOT) belong to the same industry segment: US Aggregate Bonds. Both ETFs have the same top 3 sector exposures: Sovereign, Finance and Industrials. SPAB is less expensive with a Total Expense Ratio (TER) of 0.03%, versus 0.1% for BTOT. SPAB is down -1.55% year-to-date (YTD) with +$1.57B in YTD flows. BTOT performs better with -1.23% YTD performance, and +$5M in YTD flows. Run a side-by-side ETF comparison of SPAB and BTOT 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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SPAB vs BTOT performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/16/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SPAB BTOT | -0.06%-0.21% | -1.75%-1.68% | -1.55%-1.23% | -1.68%n/a | +14.97%n/a | -1.79%n/a |
| Flows | SPAB BTOT | +$530M- | +$858M- | +$1.57B+$5M | +$2.03B- | +$3.57B- | +$5.17B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SPAB BTOT | +4.38%+3.93% | +3.86%n/a | +4.97%n/a | +5.98%n/a |
| Max drawdown | SPAB BTOT | -3.30%-3.06% | -4.68%n/a | -4.87%n/a | -17.44%n/a |
| Max drawdown duration | SPAB BTOT | 52d51d | 229dn/a | 284dn/a | 1556dn/a |
Trading data
SPAB | BTOT | |
Last sale 10/16/2026 at 1:30 PM | $24.59 | $47.63 |
| Previous close 10/15/2026 | $24.59 | $47.63 |
| Consolidated volume 10/15/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of September 30, 2026
1-year trailing difference
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SPAB | BTOT | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/16/2026 at 1:30 PM
Live
Closed
SPAB | BTOT | |
|---|---|---|
| Last price | $24.59 | $47.63 |
| 1D performance | +0.00% | +0.00% |
| AuM | $10.42 B | $28.66 M |
| E/R | 0.03% | 0.1% |
Characteristics
SPAB | BTOT | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | State Street Investment Management | iShares |
| Benchmark | Bloomberg US Aggregate Bond Index | Bloomberg US Total Fixed Income Market Index |
| N° of holdings | 6931 | 1010 |
| Asset class | Bonds | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | May 23, 2007 | December 10, 2025 |
| ESG | No | No |
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Exposure
Countries
SPAB
USA
74.49%
Other
25.51%
BTOT
USA
76.31%
Other
23.69%
Sectors
SPAB
Sovereign
45.89%
Finance
10.21%
Industrials
9.47%
Other
34.43%
BTOT
Sovereign
44.67%
Finance
11.92%
Other
43.42%
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Diversification
SPAB
Total weight of top 15 holdings out of 15
6.59%
BTOT
Total weight of top 15 holdings out of 15
18.92%
Top 15 holdings
Data as of August 31, 2026
SPAB
USA, Notes 3.5% 15dec2028, USD (AV-2028)
0.74%
US91282CRJ26
0.58%
USA, Notes 3.625% 31dec2030, USD (AH-2030)
0.55%
US01F0526982
0.50%
USA, Notes 3.375% 30nov2027, USD (BL-2027)
0.45%
USA, Notes 4.375% 30nov2028, USD (AG-2028)
0.41%
USA, Notes 3.5% 31jan2028, USD (U-2028)
0.41%
USA, Notes 3.875% 31mar2031, USD (W-2031)
0.40%
US01F0506927
0.38%
USA, Notes 3.375% 31dec2027, USD (BM-2027)
0.37%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.37%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.37%
USA, Notes 3.625% 30sep2031, USD (Q-2031)
0.36%
USA, Notes 4% 15feb2034, USD (B-2034)
0.35%
USA, Notes 4% 30jun2032, USD (M-2032)
0.35%
BTOT
BlackRock Cash Funds - Institutional
5.81%
US31418EB825
1.90%
FR SD8212, 2.5% 1may2052, USD (ABS)
1.31%
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 3.375% 15sep2027, USD (AS-2027)
0.86%
US01F0204978
0.85%
US3140XPXH76
0.85%
USA, Notes 4% 30apr2032, USD (K-2032)
0.84%
US01F0326904
0.83%
USA, Notes 4% 31jul2032, USD (N-2032)
0.83%
USA, Notes 1.875% 15feb2032, USD (B-2032)
0.75%
US31418EDD94
0.73%
Mamoura Diversified Global Holding, 5.5% 28apr2033, USD
0.70%
Saudi Arabia, 5.625% 13jan2035, USD
0.70%
Frequently asked questions about SPAB and BTOT
How have the SPAB and BTOT ETFs performed in 2026?
As of October 16, 2026, SPAB is down -1.55% year-to-date (YTD), while BTOT has lost -1.23%. That puts BTOT better performer ahead so far this year.
Which ETF is attracting more investor money: SPAB or BTOT?
Year-to-date, the SPAB ETF saw +$1.57B in flows, compared to +$5M for BTOT.
Which ETF is bigger: SPAB or BTOT?
As of October 16, 2026, SPAB holds $10.42 B in assets under management (AUM), while BTOT manages $28.66 M.
What sectors do the SPAB and BTOT ETFs invest in?
SPAB leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, BTOT focuses on Sovereign and Finance.
What are the top holdings of the SPAB ETF and BTOT ETF?
SPAB top holdings include USA, Notes 3.5% 15dec2028, USD (AV-2028), US91282CRJ26 and USA, Notes 3.625% 31dec2030, USD (AH-2030). BTOT holds in its top three: BlackRock Cash Funds - Institutional, US31418EB825 and FR SD8212, 2.5% 1may2052, USD (ABS).
Which ETF is more diversified: SPAB or BTOT?
SPAB holds 8475 securities with 6.59% of its assets in the top 15. BTOT has 1068 securities and a top 15 weight of 18.92%.
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