Are IBB and MTUM in the same category?

IBB is a thematic ETF and MTUM is a stock ETF, so they do different jobs. The table compares what both publish: return, cost and holdings.

Which returned more over the last year, IBB or MTUM?

In the year to Oct 28, 2026, with distributions reinvested, IBB returned +37.5% and MTUM +18.4%.

Which is cheaper, IBB or MTUM?

MTUM is cheaper, by 0.29 percentage points a year. That is about $29 on $10,000 held for a year. Fees come from each fund's prospectus.

How much do IBB and MTUM overlap with the S&P 500?

By their latest filed holdings, 40% of IBB and 93% of MTUM by weight is stocks the S&P 500 already holds.

Data as of Oct 28, 2026.

Across categories

IBB vs MTUM: Differences, Returns & Fees

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Over the year to Oct 28, 2026, IBB returned +37.5% to MTUM's +18.4%, and MTUM charges 0.15% to IBB's 0.44%.

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Net assets on Oct 27, 2026: $11.0bn for iShares Biotechnology ETF and $18.7bn for iShares MSCI USA Momentum Factor ETF.

IBB on its own →MTUM on its own →

At a glance

+37.5%

IBB total return, 1 year

+18.4%

MTUM total return, 1 year

0.44%

IBB expense ratio

0.15%

MTUM expense ratio

Pair scorecard

MTUM costs 0.29 points a year less; their one-year returns differ by 19.1 points; MTUM is 1.7 times larger.

IBB vs MTUM: Differences, Returns & Fees
Measure	IBB	MTUM
Return
Measure	IBB	MTUM
Total return, 1 year	+37.5%	+18.4%
Drawdown
Measure	IBB	MTUM
Below its high		11.9%, high on Jun 22, 2026
Benchmark
Measure	IBB	MTUM
What it tracks	Biotech	MSCI USA Momentum SR Variant Index
Cost and size
Measure	IBB	MTUM
Expense ratio	0.44%	0.15%
Net assets, as of Oct 27, 2026	$11.0bn	$18.7bn
Active share vs the S&P 500	99%
Holdings
Measure	IBB	MTUM
Holdings in common	1%
Top ten holdings, share of the fund	50%	35.5%

Holdings in common uses holdings dated Oct 27, 2026. Method

What they share

By the books each fund has filed, IBB and MTUM hold 1% of their money in the same securities at the same weight. Holdings dated Oct 27, 2026.

50%

0 half 100%

half

1% in common

Positions both hold · largest shared weight first IBB MTUM

REVOLUTION MEDICINES 2.50% 0.31%

ILLUMINA INC 2.93% 0.24%

ROIVANT SCIENCES LTD 1.33% 0.18%

BIOGEN 2.58% 0.16%

UNITED THERAPEUTICS 1.71% 0.10%

Only in one fund ↓

Only in IBB

GILEAD SCIENCES 8.56%

AMGEN INC 8.20%

VERTEX PHARMACEUTICALS 7.53%

REGENERON PHARMACEUTICALS 5.64%

MODERNA 5.29%

NATERA 3.85%

ARGENX SE ADR 3.42%

BEONE MEDICINES AG 2.15%

Only in MTUM

ADVANCED MICRO DEVICES 6.06%

MICRON TECHNOLOGY 5.00%

INTEL CORPORATION 3.92%

CISCO SYSTEMS INC 3.64%

JOHNSON & JOHNSON 3.45%

EXXONMOBIL HOLDINGS CORP 2.96%

PALO ALTO NETWORKS 2.88%

ALPHABET CLASS A 2.62%

Check overlap with more funds →

Side by side

IBB iShares Biotechnology ETF MTUM iShares MSCI USA Momentum Factor ETF

Where it sits Thematic ETF Stock ETF

Issuer iShares iShares

What it is Biotech Tracks the MSCI USA Momentum Factor

Total return, 1 year +37.5% +18.4%

Its benchmark over the same days not measured +13.6% (MLRG)

Gap to its benchmark not measured +4.8 pts vs MLRG

Expense ratio 0.44% 0.15%

Already in the S&P 500 40.2% 93.2%

Holdings 245 126

Net assets, as of Oct 27, 2026 $11.0bn $18.7bn

IBB and MTUM on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.

Alert

About each fund

IBB

By weight, 40% of IBB's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 99%. The top ten holdings are 50% of the fund across 245 positions, as published by its issuer for Oct 27, 2026. Over the year to Oct 28, 2026 the fund returned +37.5% with distributions reinvested.

MTUM

MTUM tracks the MSCI USA Momentum Factor. Over the year to Oct 28, 2026 it returned +18.4% with distributions reinvested, against +13.6% for its benchmark, the MSCI USA Index. The prospectus expense ratio is 0.15% a year. By its holdings published by its issuer for Oct 27, 2026, 93% of the fund by weight is stocks the S&P 500 also holds, across 126 positions, with the top ten at 35.5%. It sat 11.9% below its high of Jun 22, 2026 on Oct 28, 2026.

Questions people ask

Are IBB and MTUM in the same category?: IBB is a thematic ETF and MTUM is a stock ETF, so they do different jobs. The table compares what both publish: return, cost and holdings.
Which returned more over the last year, IBB or MTUM?: In the year to Oct 28, 2026, with distributions reinvested, IBB returned +37.5% and MTUM +18.4%.
Which is cheaper, IBB or MTUM?: MTUM is cheaper, by 0.29 percentage points a year. That is about $29 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do IBB and MTUM overlap with the S&P 500?: By their latest filed holdings, 40% of IBB and 93% of MTUM by weight is stocks the S&P 500 already holds.

Other comparisons

IBB vs SPHQ DFUS vs IBB DGRW vs IBB IBB vs SPMO MTUM vs XBI LYTE vs MTUM AIRR vs MTUM GDX vs MTUM

Where to next

IBB on its own →MTUM on its own →Hold both: look the portfolio through →Rankings →IBB dividend history →IBB holdings →MTUM dividend history →MTUM holdings →Standards and sources →

Sources and dates

IBB and MTUM filings on SEC EDGAR ↗

IBB prospectus with the expense ratio (SEC) ↗

iShares page for IBB ↗

MTUM prospectus with the expense ratio (SEC) ↗

iShares page for MTUM ↗

Links are sources, not endorsements. A comparison is not a recommendation.

How this is computed

Overlap adds up the smaller of the two weights for each security both funds hold.

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ETFIQ, IBB against MTUM, data as of Oct 28, 2026. https://etfiq.com/compare/any/ibb-vs-mtum

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Free to use with attribution for data ETFIQ computes; issuer data stays under its owner's terms.