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CMBSvsOOSPETF Comparison

ETF 1

CMBS

iShares CMBS ETF

This fund is part of

MBS & ABS

-0.45%

Full CMBS fund page

VS

ETF 2

OOSP

Obra Opportunistic Structured Products ETF

This fund is part of

US Aggregate Bonds

-0.33%

Full OOSP fund page

iShares CMBS ETF (CMBS) and Obra Opportunistic Structured Products ETF (OOSP) have similar underlying exposures to countries and sectors. CMBS's top 3 sector exposures are Industrials, Non-Corporate and Finance. In contrast, OOSP's top sector exposures are Industrials, Finance and Non-Corporate. CMBS is less expensive with a Total Expense Ratio (TER) of 0.25%, versus 1.97% for OOSP. CMBS is down -0.5% year-to-date (YTD) with -$19M in YTD flows. OOSP performs better with 3.61% YTD performance, and +$114M in YTD flows. Run a side-by-side ETF comparison of CMBS and OOSP 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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CMBS vs OOSP performance and flow charts

Performance

Cumulative Flows

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Daily, global ETF data for advanced analysis or integration into apps (API), from our partner Trackinsight.

Data Services

Historic performance and flows

Data as of 09/18/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	CMBS OOSP	-1.26%+0.01%	-0.96%+0.94%	-0.50%+3.61%	+0.64%+5.58%	+16.57%n/a	+2.53%n/a
Flows	CMBS OOSP	-$2M-	-$5M+$508K	-$19M+$114M	-$5M+$115M	+$14M-	-$239M-

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	CMBS OOSP	+2.48%+0.68%	+2.53%+0.83%	+3.61%n/a	+4.56%n/a
Max drawdown	CMBS OOSP	-1.50%-0.18%	-2.12%-0.39%	-2.58%n/a	-15.21%n/a
Max drawdown duration	CMBS OOSP	24d10d	201d37d	162dn/a	1373dn/a

Trading data

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	CMBS	OOSP
Last sale 9/18/2026 at 1:30 PM	$47.58	$10.09
Previous close 09/18/2026	$47.60	$10.11
Consolidated volume 09/18/2026
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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OOSP

is actively managed and doesn’t replicate an index

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	CMBS	OOSP
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 9/18/2026 at 1:30 PM

Live

Closed

	CMBS	OOSP
Last price	$47.58	$10.09
1D performance	-0.04%	-0.25%
AuM	$461.54 M	$150.29 M
E/R	0.25%	1.97%

Characteristics

	CMBS	OOSP
Management strategy	Passive	Active
Provider	iShares	Obra Funds
Benchmark	Bloomberg US CMBS ERISA Eligible Index	-
N° of holdings	19	11
Asset class	Fixed Income	-
Trailing 12m distribution yield	Join	Join
Inception date	February 14, 2012	April 9, 2024
ESG	No	No

More CMBS data on Trackinsight

More OOSP data on Trackinsight

Exposure

Countries

CMBS

Other

100%

OOSP

Other

100%

Sectors

CMBS

Other

100%

OOSP

Other

100%

Diversification

CMBS

Total weight of top 15 holdings out of 15

12.53%

OOSP

Total weight of top 15 holdings out of 15

13.18%

Top 15 holdings

Data as of July 31, 2026

CMBS

Freddie Mac REMICS K117, 1.406% 25aug2030, USD (ABS, A2)

1.25%

US3137HCXK30

1.14%

US3137FTBM86

1.10%

US3136BXM355

0.92%

US3137FPHK45

0.90%

US3136BMXZ61

0.87%

US3137HLJ526

0.85%

US3137FCJK14

0.74%

US05555PAB85

0.73%

US3137HAAG19

0.72%

US3137HPUE10

0.71%

US3137FMTY89

0.69%

US22945DAG88

0.67%

US09661XAB47

0.64%

US3137HHHY05

0.62%

OOSP

US62956HAG11

1.17%

US12988DAG79

1.01%

US76089TAC45

1.00%

US69549PAC14

0.99%

US12577HAG56

0.91%

US43284KAD46

0.86%

US34461WAG50

0.84%

US69547DAE67

0.83%

US92535VAS16

0.82%

US46676AAG85

0.81%

US362414AG97

0.80%

US39152MAG06

0.80%

US98919WAQ69

0.80%

US05618XAG51

0.80%

US12433KAG22

0.73%

Frequently asked questions about CMBS and OOSP

How have the CMBS and OOSP ETFs performed in 2026?

As of September 18, 2026, CMBS is down -0.5% year-to-date (YTD), while OOSP has returned 3.61%. That puts OOSP better performer ahead so far this year.

Which ETF is attracting more investor money: CMBS or OOSP?

Year-to-date, the CMBS ETF saw -$19M in flows, compared to +$114M for OOSP.

Which ETF is more volatile: CMBS or OOSP?

Over the past year, CMBS had a volatility of 2.53%, while OOSP experienced 0.83%.

Which ETF is bigger: CMBS or OOSP?

As of September 18, 2026, CMBS holds $461.54 M in assets under management (AUM), while OOSP manages $150.29 M.

What are the top holdings of the CMBS ETF and OOSP ETF?

CMBS top holdings include Freddie Mac REMICS K117, 1.406% 25aug2030, USD (ABS, A2), US3137HCXK30 and US3137FTBM86. OOSP holds in its top three: US62956HAG11, US12988DAG79 and US76089TAC45.

CMBSvsOOSPETF Comparison

iShares CMBS ETF

Obra Opportunistic Structured Products ETF

CMBS vs OOSP performance and flow charts

Performance

Cumulative Flows

Get all the metrics on this page, and more, through a reliable ETF data feed

Countries

Sectors

Diversification

Top 15 holdings

How have the CMBS and OOSP ETFs performed in 2026?

As of September 18, 2026, CMBS is down -0.5% year-to-date (YTD), while OOSP has returned 3.61%. That puts OOSP better performer ahead so far this year.

Which ETF is attracting more investor money: CMBS or OOSP?

Year-to-date, the CMBS ETF saw -$19M in flows, compared to +$114M for OOSP.

Which ETF is more volatile: CMBS or OOSP?

Over the past year, CMBS had a volatility of 2.53%, while OOSP experienced 0.83%.

Which ETF is bigger: CMBS or OOSP?

As of September 18, 2026, CMBS holds $461.54 M in assets under management (AUM), while OOSP manages $150.29 M.

What are the top holdings of the CMBS ETF and OOSP ETF?

CMBS top holdings include Freddie Mac REMICS K117, 1.406% 25aug2030, USD (ABS, A2), US3137HCXK30 and US3137FTBM86. OOSP holds in its top three: US62956HAG11, US12988DAG79 and US76089TAC45.

Which ETF is more diversified: CMBS or OOSP?

CMBS holds 454 securities with 12.53% of its assets in the top 15. OOSP has 250 securities and a top 15 weight of 13.18%.

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