OBNDvsIUSBETF Comparison
ETF 1
OBND
State Street SPDR Loomis Sayles Opportunistic Bond ETF
This fund is part of
US Aggregate Bonds
-0.23%
VS
State Street SPDR Loomis Sayles Opportunistic Bond ETF (OBND) and iShares Core Total USD Bond Market ETF (IUSB) belong to the same industry segment: US Aggregate Bonds. OBND's top 3 sector exposures are Finance, Industrials and Energy. In contrast, IUSB's top sector exposures are Sovereign, Finance and Industrials. OBND is more expensive with a Total Expense Ratio (TER) of 0.55%, versus 0.06% for IUSB. OBND is up 1.36% year-to-date (YTD) with -$19M in YTD flows. IUSB performs worse with -0.25% YTD performance, and +$10.34B in YTD flows. Run a side-by-side ETF comparison of OBND and IUSB 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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OBND vs IUSB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/01/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | OBND IUSB | +0.31%-0.08% | +0.09%-0.76% | +1.36%-0.25% | +3.54%+2.16% | +20.97%+14.53% | n/a+0.13% |
| Flows | OBND IUSB | -$26M+$805M | -$26M+$4.74B | -$19M+$10.34B | -$14M+$10.65B | +$3M+$21.92B | -+$31.62B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | OBND IUSB | +2.76%+3.70% | +2.79%+3.48% | +3.40%+4.72% | n/a+5.53% |
| Max drawdown | OBND IUSB | -1.02%-1.61% | -2.37%-2.51% | -2.88%-4.33% | n/a-17.91% |
| Max drawdown duration | OBND IUSB | 44d64d | 59d184d | 86d280d | n/a1492d |
Trading data
OBND | IUSB | |
Last sale 9/2/2026 at 1:30 PM | $25.34 | $45.18 |
| Previous close 09/01/2026 | $25.31 | $45.15 |
| Consolidated volume 09/01/2026 | ||
| 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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OBND
is actively managed and doesn’t replicate an indexOBND | IUSB | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/2/2026 at 1:30 PM
Live
Closed
OBND | IUSB | |
|---|---|---|
| Last price | $25.34 | $45.18 |
| 1D performance | +0.12% | +0.07% |
| AuM | $31.60 M | $43.55 B |
| E/R | 0.55% | 0.06% |
Characteristics
OBND | IUSB | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | State Street Investment Management | iShares |
| Benchmark | - | Bloomberg U.S. Universal Index |
| N° of holdings | 300 | 16284 |
| Asset class | - | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | September 27, 2021 | June 10, 2014 |
| ESG | No | No |
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Exposure
Countries
OBND
USA
52.18%
Other
47.82%
IUSB
USA
73.5%
Other
26.5%
Sectors
OBND
Finance
21.26%
Industrials
9.38%
Energy
8.62%
Other
60.74%
IUSB
Sovereign
43.13%
Finance
13.46%
Other
43.41%
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Diversification
OBND
Total weight of top 15 holdings out of 15
14.57%
IUSB
Total weight of top 15 holdings out of 15
9.25%
Top 15 holdings
Data as of July 31, 2026
OBND
US78467V6083
3.80%
US05555YAA10
1.61%
US67072T1088
1.48%
US46131H1077
1.20%
Nissan Motor, 4.81% 17sep2030, USD
0.78%
UniCredit, 7.296% 2apr2034, USD (7)
0.72%
Civitas Resources, 9.625% 15jun2033, USD
0.63%
Banco Mercantil del Norte (Banorte), 8% perp., USD
0.61%
Seagate Data Storage Systems, 5.875% 15jul2030, USD
0.58%
StoneX Escrow Issuer, 6.875% 15jul2032, USD
0.55%
WULF Compute, 7.75% 15oct2030, USD
0.54%
Allegiant Travel, 7.125% 1jul2031, USD
0.53%
Sirius XM Radio LLC, 5.875% 15apr2032, USD
0.52%
UBS Group, 7% perp., USD
0.51%
Vital Energy (US), 7.875% 15apr2032, USD
0.51%
IUSB
BlackRock Liquidity TempCash
4.35%
US01F0206874
0.42%
USA, Notes 4.375% 31dec2029, USD (AH-2029)
0.38%
USA, Notes 4.375% 15may2036, USD (C-2036)
0.37%
USA, Notes 4% 15feb2034, USD (B-2034)
0.37%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.35%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.35%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.34%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.34%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.34%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.34%
USA, Notes 4.25% 15may2035, USD (C-2035)
0.33%
USA, Notes 2.75% 15aug2032, USD (E-2032)
0.33%
USA, Notes 4% 15nov2035, USD (F-2035)
0.33%
US01F0426811
0.31%
Frequently asked questions about OBND and IUSB
How have the OBND and IUSB ETFs performed in 2026?
As of September 1, 2026, OBND is up 1.36% year-to-date (YTD), while IUSB has lost -0.25%. That puts OBND better performer ahead so far this year.
Which ETF is attracting more investor money: OBND or IUSB?
Year-to-date, the OBND ETF saw -$19M in flows, compared to +$10.34B for IUSB.
Which ETF is more volatile: OBND or IUSB?
Over the past year, OBND had a volatility of 2.79%, while IUSB experienced 3.48%.
Which ETF is bigger: OBND or IUSB?
As of September 1, 2026, OBND holds $31.60 M in assets under management (AUM), while IUSB manages $43.55 B.
What sectors do the OBND and IUSB ETFs invest in?
OBND leans toward sectors like Finance, Industrials and Energy. Meanwhile, IUSB focuses on Sovereign and Finance.
What are the top holdings of the OBND ETF and IUSB ETF?
OBND top holdings include US78467V6083, US05555YAA10 and US67072T1088. IUSB holds in its top three: BlackRock Liquidity TempCash, US01F0206874 and USA, Notes 4.375% 31dec2029, USD (AH-2029).
Which ETF is more diversified: OBND or IUSB?
OBND holds 326 securities with 14.57% of its assets in the top 15. IUSB has 18026 securities and a top 15 weight of 9.25%.
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