How much do FBIOX and IBB overlap?

FBIOX and IBB overlap by about 42% of portfolio weight, sharing 83 holdings (per each fund's latest SEC N-PORT filing, weights rolled forward to today).

Is ChartRow affiliated with any of these funds?

No. ChartRow is independent and not affiliated with, sponsored by, or endorsed by Fidelity, BlackRock. Comparisons are derived independently from public SEC filings and market data; not investment advice.

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FBIOX vs IBB (2026)

FBIOX

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IBB

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Fidelity Select Biotechnology Portfolio and iShares Biotechnology ETF side by side. IBB is the cheaper fund (0.44% vs 0.62% expense ratio). Over the last five years FBIOX returned more (+52.90% vs +38.07%, total return). Their portfolios overlap by about 42% of weight. Not investment advice.

Fund facts#

Data provided bySource: Twelve Data

Returns as of market close, Oct 30, 2026. The charts run through the Oct 30 close.

	FBIOX	IBB
Focus	Sector Funds	Biotech
Expense ratio	0.62%	0.44%
AUM	$6.3B	$9.1B
Distribution yield	—	0.16%
Holdings	200	247
1M total	+1.5%	+3.4%
YTD total	+21.3%	+29.1%
1Y total	+30.2%	+38.6%
3Y total	+120%	+93.9%
5Y total	+52.9%	+38.1%
10Y total	—	+157%
3Y total CAGR	+30.0%/yr	+24.7%/yr
5Y total CAGR	+8.9%/yr	+6.7%/yr
10Y total CAGR	—	+9.9%/yr
Issuer	Fidelity	BlackRock
Inception	—	2001-02-05

All returns are total returns (dividends reinvested), through the latest price during the session. CAGR = compound annual growth rate. '—' means the fund's history doesn't span the horizon. A mutual fund's AUM is its whole fund's, every share class together (its SEC filing); an ETF's is its own. Returns run to Oct 30, 2026, the last month-end, as fund companies report a mutual fund's: a fund that pays monthly books each month's income on its last business day, so a return to a later day would leave that month's income out.

Annualized returns (CAGR)#

Data provided bySource: Twelve Data

FBIOXIBB

+33.1%+39.8%+21.3%+24.1%+30.5%+24.8%+8.9%+6.7%+9.9%+13.5%+11.3%+8.4%1Ysince 10/20/252Ysince 10/21/243Ysince 10/23/235Ysince 10/25/2110Ysince 10/24/1615Ysince 10/24/1120Ysince 10/23/0625Ysince 10/22/01

0%+10%+20%+30%+40%

Compound annual growth rate per holding period, total return, from weekly adjusted closes. Horizons a fund's history can't span show no bar; horizons no fund spans are omitted.

Performance, rebased#

Data provided bySource: Twelve Data

Total return, rebased to 0% · FBIOX vs IBB

−5%0%+5%+10%+15%+20%+25%+30%+35%2026FebMarAprMayJunJulAugSepOctNov

FBIOX+20.6%IBB+26.6%

Nov 12, 2026

FBIOX+20.6%

IBB+26.6%

Returns by year#

Data provided bySource: Twelve Data

Year	FBIOX	IBB
2017	—	+21.1%
2018	—	-9.5%
2019	—	+25.2%
2020	+38.3%	+26.0%
2021	-12.4%	+1.0%
2022	-15.9%	-13.7%
2023	+10.1%	+3.8%
2024	+7.3%	-2.4%
2025	+36.4%	+28.0%
2026 YTD	+21.3%	+29.1%

Total returns (dividends reinvested), calendar years.

Returns by year, charted#

FBIOXIBB

+21.1%-9.5%+25.2%+38.3%+26.0%-12.4%+1.0%-15.9%-13.7%+10.1%+3.8%+7.3%-2.4%+36.4%+28.0%+21.3%+29.1%2017201820192020202120222023202420252026 YTD

−20%−10%0%+10%+20%+30%+40%

Holdings overlap#

FBIOX and IBB overlap by about 42% of portfolio weight — 83 shared holdings out of 200 in FBIOX and 247 in IBB, from each fund's latest SEC filing (Aug 31, 2026 / Jun 30, 2026).

Only in FBIOX

ABBV (12.2%), JAZZ (1.6%), UCB SA (1.3%), CANDEL THERAPEUTICS INC (1.0%), KNSA (1.0%) and 112 more.

Only in IBB

ILMN (2.2%), GMAB (1.9%), INCY (1.6%), EXEL (1.2%), NBIX (1.1%) and 159 more.

Top 10 holdings, side by side#

FBIOXIBB

12.2%0.0%7.7%9.0%8.9%0.5%0.0%8.1%0.1%7.8%0.0%6.6%5.7%5.6%2.2%3.5%1.7%3.0%1.9%2.6%ABBVAMGNKRYSGILDVRTXREGNMRNAARGXNTRABIIB

0%2%4%6%8%10%12%14%

Merged top 10 across the funds — each column is the holding's % of that fund.

Sector weights#

Sector	FBIOX	IBB
Healthcare	87.1%	93.6%
Industrials	0.0%	0.9%
Technology	0.0%	0.5%
Not on ChartRow	12.9%	5.0%

Sector weights, charted#

FBIOXIBB

87.1%93.6%0.0%0.9%0.0%0.5%12.9%5.0%HealthcareIndustrialsTechnologyNot on ChartRow

0%20%40%60%80%100%

Estimated portfolio characteristics#

Data provided bySource: Twelve Data

	FBIOX	IBB
P/E (trailing)	—	—
P/B	6.4	5.6
Dividend yield	0.53%	0.40%
Earnings growth (TTM)	-129.1%	-251.3%

Weighted by each fund's filed holdings, over the members we track. Shown only when every fund's tracked coverage is high enough for the average to mean something.

Growth from any starting date#

Data provided bySource: Twelve Data

Hover to move the starting point — every fund rebases to 1× at that date, so the comparison holds from any entry point back to 2019 (the earliest date all 2 funds existed). Log scale, weekly total returns.

0.25×0.5×1×2×4×rebased: Jul 2019

FBIOX2.4×IBB2.1×

Rebase at

Hover anywhere to rebase every line to 1× at that date and compare growth from that point — or pick a year above, which is the same thing with an address. Log scale.

Fund flows#

Period	FBIOX	IBB
Aug 2026	+$18.4M	—
Jul 2026	+$71.7M	—
Jun 2026	−$45.7M	+$299.2M
May 2026	—	−$175.2M
Apr 2026	—	−$166.7M
Mar 2026	—	−$332M

Net creations minus redemptions, derived from consecutive SEC N-PORT filings. The form only exists since mid-2019.

Fund flows, charted#

FBIOXIBB

−$849.7M+$928.6M−$463.4M+$238.7M−$1.5B−$836.2M+$363.1M+$44.5M−$251.2M20192020202120222023202420252026 YTD

−$1.5B−$1.0B−$500M$0$500M$1.0B

Methodology#

Returns are total returns (dividends reinvested) from daily adjusted closes. Holdings, overlap, sector weights and flows derive from each fund's public SEC filings (Form N-PORT), anchored on the latest filing and rolled forward daily by price moves. Overlap is the sum of the smaller weight across shared holdings. See each fund's full holdings: FBIOX holdings · IBB holdings. Past performance does not predict future returns; not investment advice.

FAQ#

FBIOX or IBB — which is better?: IBB is the cheaper fund (0.44% vs 0.62% expense ratio). Over the last five years FBIOX returned more (+52.90% vs +38.07%, total return). Their portfolios overlap by about 42% of weight. FBIOX, a managed sector fund, against IBB, the sector's index ETF.
How much do FBIOX and IBB overlap?: FBIOX and IBB overlap by about 42% of portfolio weight, sharing 83 holdings (per each fund's latest SEC N-PORT filing, weights rolled forward to today).
Is ChartRow affiliated with any of these funds?: No. ChartRow is independent and not affiliated with, sponsored by, or endorsed by Fidelity, BlackRock. Comparisons are derived independently from public SEC filings and market data; not investment advice.