SPABvsBDBTETF Comparison
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State Street SPDR Portfolio Aggregate Bond ETF (SPAB) and Bluemonte Core Bond ETF (BDBT) 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 0.27% for BDBT. SPAB is down -1.55% year-to-date (YTD) with +$1.57B in YTD flows. BDBT performs worse with -1.58% YTD performance, and +$107M in YTD flows. Run a side-by-side ETF comparison of SPAB and BDBT 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 BDBT 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 BDBT | -0.06%+0.06% | -1.75%-1.68% | -1.55%-1.58% | -1.68%-1.43% | +14.97%n/a | -1.79%n/a |
| Flows | SPAB BDBT | +$530M+$10M | +$858M+$20M | +$1.57B+$107M | +$2.03B+$157M | +$3.57B- | +$5.17B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SPAB BDBT | +4.38%+4.06% | +3.86%+3.88% | +4.97%n/a | +5.98%n/a |
| Max drawdown | SPAB BDBT | -3.30%-2.93% | -4.68%-4.39% | -4.87%n/a | -17.44%n/a |
| Max drawdown duration | SPAB BDBT | 52d51d | 229d228d | 284dn/a | 1556dn/a |
Trading data
SPAB | BDBT | |
Last sale 10/16/2026 at 1:30 PM | $24.59 | $24.35 |
| Previous close 10/15/2026 | $24.59 | $24.36 |
| 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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BDBT
is actively managed and doesn’t replicate an indexSPAB | BDBT | |
|---|---|---|
| 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 | BDBT | |
|---|---|---|
| Last price | $24.59 | $24.35 |
| 1D performance | +0.00% | -0.04% |
| AuM | $10.42 B | $490.78 M |
| E/R | 0.03% | 0.27% |
Characteristics
SPAB | BDBT | |
|---|---|---|
| Management strategy | Passive | Active |
| Provider | State Street Investment Management | Bluemonte Investment Management |
| Benchmark | Bloomberg US Aggregate Bond Index | - |
| N° of holdings | 6931 | 11226 |
| Asset class | Bonds | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | May 23, 2007 | June 23, 2025 |
| ESG | No | No |
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Exposure
Countries
SPAB
USA
74.49%
Other
25.51%
BDBT
USA
76.53%
Other
23.47%
Sectors
SPAB
Sovereign
45.89%
Finance
10.21%
Industrials
9.47%
Other
34.43%
BDBT
Sovereign
46.42%
Finance
10.14%
Other
43.44%
Diversification
SPAB
Total weight of top 15 holdings out of 15
6.59%
BDBT
Total weight of top 15 holdings out of 15
11.03%
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%
BDBT
BlackRock Cash Funds - Institutional
2.35%
USA, Notes 3.5% 30sep2029, USD (AD-2029)
0.70%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.64%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.64%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.63%
USA, Notes 4.25% 15may2035, USD (C-2035)
0.63%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.63%
USA, Notes 4.375% 15may2036, USD (C-2036)
0.63%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.62%
USA, Notes 4% 15nov2035, USD (F-2035)
0.61%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.61%
USA, Notes 4% 15feb2034, USD (B-2034)
0.61%
USA, Notes 4.5% 15nov2033, USD (F-2033)
0.61%
USA, Notes 4% 28feb2030, USD (H-2030)
0.58%
USA, Notes 3.875% 15aug2033, USD (E-2033)
0.55%
Frequently asked questions about SPAB and BDBT
How have the SPAB and BDBT ETFs performed in 2026?
As of October 16, 2026, SPAB is down -1.55% year-to-date (YTD), while BDBT has lost -1.58%. That puts SPAB better performer ahead so far this year.
Which ETF is attracting more investor money: SPAB or BDBT?
Year-to-date, the SPAB ETF saw +$1.57B in flows, compared to +$107M for BDBT.
Which ETF is more volatile: SPAB or BDBT?
Over the past year, SPAB had a volatility of 3.86%, while BDBT experienced 3.88%.
Which ETF is bigger: SPAB or BDBT?
As of October 16, 2026, SPAB holds $10.42 B in assets under management (AUM), while BDBT manages $490.78 M.
What sectors do the SPAB and BDBT ETFs invest in?
SPAB leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, BDBT focuses on Sovereign and Finance.
What are the top holdings of the SPAB ETF and BDBT ETF?
SPAB top holdings include USA, Notes 3.5% 15dec2028, USD (AV-2028), US91282CRJ26 and USA, Notes 3.625% 31dec2030, USD (AH-2030). BDBT holds in its top three: BlackRock Cash Funds - Institutional, USA, Notes 3.5% 30sep2029, USD (AD-2029) and USA, Notes 4.625% 15feb2035, USD (B-2035).
Which ETF is more diversified: SPAB or BDBT?
SPAB holds 8475 securities with 6.59% of its assets in the top 15. BDBT has 20890 securities and a top 15 weight of 11.03%.
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