SIFIvsIBDTETF Comparison
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Harbor Scientific Alpha Income ETF (SIFI) belongs to the Intl Aggregate Bonds segment. iShares iBonds Dec 2028 Term Corporate ETF (IBDT) is part of the US Corporate IG Bonds segment. SIFI's top 3 sector exposures are Finance, Energy and Technology. In contrast, IBDT's top sector exposures are Finance, Technology and Utilities. SIFI is more expensive with a Total Expense Ratio (TER) of 0.5%, versus 0.1% for IBDT. SIFI is up 0.32% year-to-date (YTD) with -$9M in YTD flows. IBDT performs better with 1.52% YTD performance, and +$618M in YTD flows. Run a side-by-side ETF comparison of SIFI and IBDT 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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SIFI vs IBDT performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/16/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SIFI IBDT | -0.38%+0.35% | -1.25%+0.27% | +0.32%+1.52% | +1.35%+2.20% | +22.84%+19.93% | +7.16%+7.46% |
| Flows | SIFI IBDT | -+$14M | -$10M+$98M | -$9M+$618M | -$10M+$1.00B | -$9M+$2.99B | -$6M+$3.85B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SIFI IBDT | +3.07%+1.20% | +2.89%+1.30% | +3.53%+2.73% | +4.00%+4.51% |
| Max drawdown | SIFI IBDT | -2.49%-0.73% | -2.68%-0.99% | -3.45%-1.93% | -15.93%-16.57% |
| Max drawdown duration | SIFI IBDT | 52d52d | 103d87d | 87d123d | 1208d1208d |
Trading data
SIFI | IBDT | |
Last sale 10/16/2026 at 1:46 PM | $42.25 | $24.97 |
| Previous close 10/16/2026 | $42.34 | $24.98 |
| Consolidated volume 10/16/2026 | ||
| 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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SIFI
is actively managed and doesn’t replicate an indexSIFI | IBDT | |
|---|---|---|
| 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 1:46 PM
Live
Closed
SIFI | IBDT | |
|---|---|---|
| Last price | $42.25 | $24.97 |
| 1D performance | -0.21% | -0.06% |
| AuM | $23.28 M | $4.11 B |
| E/R | 0.5% | 0.1% |
Characteristics
SIFI | IBDT | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | Harbor Capital | iShares |
| Benchmark | - | Bloomberg December 2028 Maturity Corporate Index |
| N° of holdings | 157 | 726 |
| Asset class | - | Fixed Income |
| Trailing 12m distribution yield | Join | Join |
| Inception date | September 16, 2021 | September 18, 2018 |
| ESG | No | No |
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Exposure
Countries
SIFI
USA
68.21%
Other
31.79%
IBDT
USA
83.29%
Other
16.71%
Sectors
SIFI
Finance
14.35%
Energy
13.62%
Technology
12.16%
Industrials
7.73%
Other
52.13%
IBDT
Finance
33.68%
Technology
10.66%
Utilities
10.15%
Healthcare
8.4%
Industrials
8.12%
Consumer Non-Cycl.
7.4%
Other
21.58%
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Diversification
SIFI
Total weight of top 15 holdings out of 15
13.71%
IBDT
Total weight of top 15 holdings out of 15
8.45%
Top 15 holdings
Data as of August 31, 2026
SIFI
DuPont de Nemours, 4.8% 15may2033, USD
1.21%
Naspers, 3.061% 13jul2031, USD
1.13%
The Home Depot, 3.25% 15apr2032, USD
1.03%
EnQuest, 9.875% 30apr2031, USD
0.89%
Park-Ohio Industries, 8.5% 1aug2030, USD
0.89%
CVR Energy, 7.875% 15feb2034, USD
0.87%
Lindblad Expeditions, 7% 15sep2030, USD
0.87%
Open Text Corporation, 6.9% 1dec2027, USD
0.86%
KeySpan Gas East, 5.994% 6mar2033, USD
0.86%
Nordson, 5.8% 15sep2033, USD
0.86%
Centene, 2.5% 1mar2031, USD
0.85%
Imperial Brands, 5.5% 1feb2030, USD
0.85%
BAE Systems, 5.125% 26mar2029, USD
0.85%
VICI Properties, 3.75% 15feb2027, USD
0.85%
California Resources, 7.25% 15jan2035, USD
0.84%
IBDT
CVS Health, 4.3% 25mar2028, USD
0.90%
Pfizer, 4.45% 19may2028, USD
0.71%
Amgen, 5.15% 2mar2028, USD
0.68%
Cigna Group, 4.375% 15oct2028, USD
0.67%
Aercap Holdings, 3% 29oct2028, USD
0.64%
Salesforce, 4.5% 15mar2028, USD
0.57%
RTX, 4.125% 16nov2028, USD
0.54%
Morgan Stanley, 3.591% 22jul2028, USD (I)
0.53%
NVIDIA, 4.25% 15jun2028, USD
0.52%
BlackRock Cash Funds - Treasury
0.51%
Sprint Capital Corp, 6.875% 15nov2028, USD
0.47%
Citibank N.A., 5.803% 29sep2028, USD
0.46%
Amazon.com, 3.85% 13mar2028, USD
0.44%
Apple, 1.2% 8feb2028, USD
0.40%
Amazon.com, 3.9% 20nov2028, USD
0.39%
Frequently asked questions about SIFI and IBDT
How have the SIFI and IBDT ETFs performed in 2026?
As of October 16, 2026, SIFI is up 0.32% year-to-date (YTD), while IBDT has returned 1.52%. That puts IBDT better performer ahead so far this year.
Which ETF is attracting more investor money: SIFI or IBDT?
Year-to-date, the SIFI ETF saw -$9M in flows, compared to +$618M for IBDT.
Which ETF is more volatile: SIFI or IBDT?
Over the past year, SIFI had a volatility of 2.89%, while IBDT experienced 1.3%.
Which ETF is bigger: SIFI or IBDT?
As of October 16, 2026, SIFI holds $23.28 M in assets under management (AUM), while IBDT manages $4.11 B.
What sectors do the SIFI and IBDT ETFs invest in?
SIFI leans toward sectors like Finance, Energy and Technology. Meanwhile, IBDT focuses on Finance, Technology and Utilities.
What are the top holdings of the SIFI ETF and IBDT ETF?
SIFI top holdings include DuPont de Nemours, 4.8% 15may2033, USD, Naspers, 3.061% 13jul2031, USD and The Home Depot, 3.25% 15apr2032, USD. IBDT holds in its top three: CVS Health, 4.3% 25mar2028, USD, Pfizer, 4.45% 19may2028, USD and Amgen, 5.15% 2mar2028, USD.
Which ETF is more diversified: SIFI or IBDT?
SIFI holds 157 securities with 13.71% of its assets in the top 15. IBDT has 732 securities and a top 15 weight of 8.45%.
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