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FSECvsMBBETF Comparison

ETF 1

FSEC

FIDELITY INVESTMENT GRADE SECURITIZED ETF

This fund is part of

MBS & ABS

-0.04%

Full FSEC fund page

VS

ETF 2

MBB

iShares MBS ETF

This fund is part of

MBS & ABS

-0.04%

Full MBB fund page

FIDELITY INVESTMENT GRADE SECURITIZED ETF (FSEC) and iShares MBS ETF (MBB) belong to the same industry segment: MBS & ABS. In contrast, MBB's top sector exposures are Industrials, Non-Corporate and Finance. FSEC is more expensive with a Total Expense Ratio (TER) of 0.36%, versus 0.04% for MBB. FSEC is down -1.38% year-to-date (YTD) with +$455M in YTD flows. MBB performs worse with -1.78% YTD performance, and -$1.79B in YTD flows. Run a side-by-side ETF comparison of FSEC and MBB 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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FSEC vs MBB 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 10/16/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	FSEC MBB	-0.28%-0.25%	-2.29%-2.30%	-1.38%-1.78%	-1.07%-1.43%	+18.54%+17.04%	+0.35%-0.38%
Flows	FSEC MBB	+$2M-$3.31B	+$54M-$2.66B	+$455M-$1.79B	+$574M-$5.06B	+$4.66B+$8.97B	+$4.65B+$13.89B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	FSEC MBB	+5.09%+5.70%	+4.02%+4.61%	+5.56%+5.73%	+6.63%+6.66%
Max drawdown	FSEC MBB	-4.10%-4.27%	-4.90%-5.38%	-4.96%-5.38%	-17.51%-16.94%
Max drawdown duration	FSEC MBB	52d52d	229d229d	198d229d	1403d1405d

Trading data

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	FSEC	MBB
Last sale 10/16/2026 at 1:30 PM	$42.20	$90.52
Previous close 10/15/2026	$42.19	$90.59
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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FSEC

is actively managed and doesn’t replicate an index

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	FSEC	MBB
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 10/16/2026 at 1:30 PM

Live

Closed

	FSEC	MBB
Last price	$42.20	$90.52
1D performance	+0.02%	-0.08%
AuM	$4.55 B	$35.27 B
E/R	0.36%	0.04%

Characteristics

	FSEC	MBB
Management strategy	Active	Passive
Provider	Fidelity	iShares
Benchmark	-	Bloomberg U.S. MBS Index
N° of holdings	-	1237
Asset class	-	Bonds
Trailing 12m distribution yield	Join	Join
Inception date	March 2, 2021	March 13, 2007
ESG	No	No

More FSEC data on Trackinsight

More MBB data on Trackinsight

Exposure

Countries

FSEC

Data will be available soon

MBB

USA

28.44%

Other

71.56%

Sectors

FSEC

Data will be available soon

MBB

Industrials

20.61%

Non-Corporate

7.6%

Other

71.79%

Diversification

FSEC

Data will be available soon

MBB

Total weight of top 15 holdings out of 15

16.82%

Top 15 holdings

Data as of January 1, 1970

FSEC

Data will be available soon

MBB

BlackRock Cash Funds - Institutional

7.60%

US01F0526982

1.26%

US21H0526945

1.05%

FR SD8146, 2% 1may2051, USD (ABS)

0.98%

US01F0506927

0.87%

US21H0606978

0.63%

G2 MB0025, 5% 20nov2054, USD (ABS)

0.55%

US21H0506988

0.55%

G2 MA7648, 2% 20oct2051, USD (ABS)

0.51%

US36179WTX64

0.50%

FN MA4492, 2% 1dec2051, USD (ABS)

0.49%

US36179WJR07

0.48%

US21H0426955

0.48%

FR SD8140, 2% 1apr2051, USD (ABS)

0.47%

FN MA4465, 2% 1nov2051, USD (ABS)

0.42%

Frequently asked questions about FSEC and MBB

How have the FSEC and MBB ETFs performed in 2026?

As of October 16, 2026, FSEC is down -1.38% year-to-date (YTD), while MBB has lost -1.78%. That puts FSEC better performer ahead so far this year.

Which ETF is attracting more investor money: FSEC or MBB?

Year-to-date, the FSEC ETF saw +$455M in flows, compared to -$1.79B for MBB.

Which ETF is more volatile: FSEC or MBB?

Over the past year, FSEC had a volatility of 4.02%, while MBB experienced 4.61%.

Which ETF is bigger: FSEC or MBB?

As of October 16, 2026, FSEC holds $4.55 B in assets under management (AUM), while MBB manages $35.27 B.

The Weekly ETF Market Monitor (September 28-October 2, 2026)

October 2, 2026

MBB

NYSE x ETF Central ETF Education Series

March 5, 2024

MBB

FSECvsMBBETF Comparison

FIDELITY INVESTMENT GRADE SECURITIZED ETF

iShares MBS ETF

FSEC vs MBB 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 FSEC and MBB ETFs performed in 2026?

As of October 16, 2026, FSEC is down -1.38% year-to-date (YTD), while MBB has lost -1.78%. That puts FSEC better performer ahead so far this year.

Which ETF is attracting more investor money: FSEC or MBB?

Year-to-date, the FSEC ETF saw +$455M in flows, compared to -$1.79B for MBB.

Which ETF is more volatile: FSEC or MBB?

Over the past year, FSEC had a volatility of 4.02%, while MBB experienced 4.61%.

Which ETF is bigger: FSEC or MBB?

As of October 16, 2026, FSEC holds $4.55 B in assets under management (AUM), while MBB manages $35.27 B.

The Weekly ETF Market Monitor (September 28-October 2, 2026)

NYSE x ETF Central ETF Education Series

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