CORBvsSDFIETF Comparison
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AB Core Bond ETF (CORB) belongs to the US Aggregate Bonds segment. AB Short Duration Income ETF (SDFI) is part of the Intl IG Bonds segment. Both ETFs have the same top 3 sector exposures: Sovereign, Finance and Industrials. CORB is less expensive with a Total Expense Ratio (TER) of 0.28%, versus 0.3% for SDFI. CORB is down -0.52% year-to-date (YTD) with +$297M in YTD flows. SDFI performs better with 1.46% YTD performance, and +$41M in YTD flows. Run a side-by-side ETF comparison of CORB and SDFI 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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CORB vs SDFI performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 08/28/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | CORB SDFI | -0.17%+0.24% | -0.58%+0.47% | -0.52%+1.46% | n/a+2.95% | n/an/a | n/an/a |
| Flows | CORB SDFI | +$50M+$7M | +$125M+$19M | +$297M+$41M | -+$64M | -- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | CORB SDFI | +3.97%+1.64% | n/a+1.51% | n/an/a | n/an/a |
| Max drawdown | CORB SDFI | -1.79%-0.39% | n/a-1.13% | n/an/a | n/an/a |
| Max drawdown duration | CORB SDFI | 60d19d | n/a46d | n/an/a | n/an/a |
Trading data
CORB | SDFI | |
Last sale | ||
| Previous close 08/28/2026 | ||
| Consolidated volume 08/28/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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Main metrics
CORB | SDFI | |
|---|---|---|
| Last price | – | – |
| 1D performance | – | – |
| AuM | $1.15 B | $192.30 M |
| E/R | 0.28% | 0.3% |
Characteristics
CORB | SDFI | |
|---|---|---|
| Management strategy | Active | Active |
| Provider | AllianceBernstein | AllianceBernstein |
| Benchmark | - | - |
| N° of holdings | 506 | 386 |
| Asset class | - | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | November 7, 2025 | June 10, 2024 |
| ESG | No | No |
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Exposure
Countries
CORB
USA
55.52%
Other
44.48%
SDFI
USA
54.3%
Other
45.7%
Sectors
CORB
Sovereign
35.5%
Finance
8.73%
Other
55.77%
SDFI
Sovereign
18.68%
Finance
16.14%
Other
65.18%
Diversification
CORB
Total weight of top 15 holdings out of 15
24.06%
SDFI
Total weight of top 15 holdings out of 15
18.04%
Top 15 holdings
Data as of July 31, 2026
CORB
USA, Notes 4.125% 31oct2031, USD (R-2031)
2.39%
USA, Notes 3.125% 15nov2028, USD (F-2028)
2.14%
USA, Bonds 4.625% 15nov2055, USD
1.89%
US01F0206874
1.86%
USA, Notes 3.875% 31mar2031, USD (W-2031)
1.83%
USA, Notes 3.625% 30sep2030, USD (AD-2030)
1.72%
USA, Notes 3.75% 31aug2031, USD (P-2031)
1.68%
USA, Notes 3.625% 30sep2031, USD (Q-2031)
1.65%
US21H0226892
1.50%
USA, Notes 4.5% 15nov2033, USD (F-2033)
1.29%
USA, Notes 4.625% 30sep2028, USD (AD-2028)
1.26%
US21H0506806
1.23%
USA, Notes 4.25% 28feb2029, USD (V-2029)
1.23%
USA, TIPS 1.375% 15jul2033, USD (D-2033)
1.20%
US01F0526800
1.18%
SDFI
USA, TIPS 2.125% 15apr2029, USD (X-2029)
3.17%
USA, Notes 4.125% 30jun2028, USD (BD-2028)
2.86%
USA, Notes 3.875% 31jul2030, USD (AB-2030)
1.65%
USA, Notes 4% 31may2028, USD (BC-2028)
1.62%
USA, Notes 3.625% 31aug2030, USD (AC-2030)
1.29%
USA, Notes 4% 28feb2030, USD (H-2030)
1.13%
USA, Notes 4.25% 31jan2030, USD (U-2030)
1.06%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.99%
USA, Notes 3.75% 31oct2032, USD (R-2032)
0.79%
USA, Notes 3.875% 30sep2032, USD (Q-2032)
0.78%
USA, Notes 3.75% 30nov2032, USD (S-2032)
0.71%
US01F0526800
0.58%
USA, Notes 3.625% 31dec2030, USD (AH-2030)
0.51%
USA, Notes 3.5% 31jan2028, USD (U-2028)
0.50%
Athene Global Funding, 5.133% 1jun2029, USD (2026-4)
0.42%
Frequently asked questions about CORB and SDFI
How have the CORB and SDFI ETFs performed in 2026?
As of August 28, 2026, CORB is down -0.52% year-to-date (YTD), while SDFI has returned 1.46%. That puts SDFI better performer ahead so far this year.
Which ETF is attracting more investor money: CORB or SDFI?
Year-to-date, the CORB ETF saw +$297M in flows, compared to +$41M for SDFI.
Which ETF is bigger: CORB or SDFI?
As of August 28, 2026, CORB holds $1.15 B in assets under management (AUM), while SDFI manages $192.30 M.
What sectors do the CORB and SDFI ETFs invest in?
CORB leans toward sectors like Sovereign and Finance. Meanwhile, SDFI focuses on Sovereign and Finance.
What are the top holdings of the CORB ETF and SDFI ETF?
CORB top holdings include USA, Notes 4.125% 31oct2031, USD (R-2031), USA, Notes 3.125% 15nov2028, USD (F-2028) and USA, Bonds 4.625% 15nov2055, USD. SDFI holds in its top three: USA, TIPS 2.125% 15apr2029, USD (X-2029), USA, Notes 4.125% 30jun2028, USD (BD-2028) and USA, Notes 3.875% 31jul2030, USD (AB-2030).
Which ETF is more diversified: CORB or SDFI?
CORB holds 721 securities with 24.06% of its assets in the top 15. SDFI has 564 securities and a top 15 weight of 18.04%.
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