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FDN vs IBB: which is really different?

FDN and IBB hold 0% of their weight in the same names, and IBB returned +36.1% over the year. First Trust Dow Jones Internet Index Fund and iShares Biotechnology ETF.

IBB costs 0.05 points a year less; their one-year returns differ by 30.1 points; IBB is 1.9 times larger.

FDNIBB
Expense ratio0.49%0.44%
Net assets, as of Oct 8, 2026$5.4bn$10.3bn
Total return, 1 year+6.0%+36.1%
What it tracksInternet and e-commerceBiotech
Holdings in common0%
S&P 500, total return, 1 year+17.3%
Against the S&P 500, 1 yearbehind by 11.3 ptsahead by 18.8 pts
Top ten holdings, share of the fund62%

Holdings in common uses holdings dated Oct 8, 2026.

82.6%
FDN in the S&P 500
39.5%
IBB in the S&P 500
+6.0%
FDN total return, 1 year
+36.1%
IBB total return, 1 year
FDN · 1 year to Oct 9, 202617% of its weight is outside the S&P 500
17% of its weight is outside the S&P 50083% of FDN's weight is in S&P 500 companies and 17% is outside the index. Holdings as of Oct 8, 2026.83%17%of its weight in S&P 500 companiesoutsideactive share 86% · top ten 63% of the fund · 41 holdings as published by its issuer for Oct 8, 2026 · Nasdaq-100: 61% in17% of its weight is outside the S&P 50083% of FDN's weight is in S&P 500 companies and 17% is outside the index. Holdings as of Oct 8, 2026.83%17%in the S&P 50017% of its weight outside the S&P 500active share 86% · Nasdaq-100: 61% in

83% of FDN's weight is in S&P 500 companies and 17% is outside the index. Holdings as of Oct 8, 2026.

IBB · 1 year to Oct 9, 202661% of its weight is outside the S&P 500
61% of its weight is outside the S&P 50040% of IBB's weight is in S&P 500 companies and 61% is outside the index. Holdings as of Oct 8, 2026.40%61%of its weight in S&P 500 companiesof its weight outside the S&P 500active share 99% · top ten 50% of the fund · 245 holdings as published by its issuer for Oct 8, 2026 · Nasdaq-100: 33% in61% of its weight is outside the S&P 50040% of IBB's weight is in S&P 500 companies and 61% is outside the index. Holdings as of Oct 8, 2026.40%61%in the S&P 500outside the S&P 500active share 99% · Nasdaq-100: 33% in

40% of IBB's weight is in S&P 500 companies and 61% is outside the index. Holdings as of Oct 8, 2026.

ETFIQ Off-Index Score · IBB scores higherHow much of it is not the index it is sold as an alternative to?
0.1, the lowest in this set92.3, the highest

A percentile among the 391 thematic ETFs with a holdings filing. All thematic ETFs ranked by it → How it is computed →

What they hold in common

By the books each fund has filed, FDN and IBB hold 0% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Oct 8, 2026.

half

0% in common

Positions both hold, largest shared weight first
Holding FDN IBB
Only in FDN
Meta Platforms, Inc. (Class A) 10.77%
Amazon.com, Inc. 9.83%
Cisco Systems, Inc. 8.93%
Netflix, Inc. 5.79%
Alphabet Inc. (Class A) 5.70%
Arista Networks, Inc. 4.81%
Alphabet Inc. (Class C) 4.57%
Salesforce, Inc. 4.10%
Only in IBB
GILEAD SCIENCES 8.37%
AMGEN INC 7.89%
VERTEX PHARMACEUTICALS 7.69%
REGENERON PHARMACEUTICALS 5.40%
MODERNA 5.30%
NATERA 3.88%
ARGENX SE ADR 3.35%
ILLUMINA INC 2.94%

0% of the two portfolios are the same securities at the same weight.

Performance, window by window

Total returnvs the S&P 500vs the Nasdaq-100
WindowFDNIBBFDNIBBFDNIBB
3 months+9.1%+7.5%+5.7 pts+4.1 pts+5.4 pts+3.9 pts
6 months+24.0%+21.9%+8.9 pts+6.8 pts+0.8 pts−1.3 pts
1 year+6.0%+36.1%−11.3 pts+18.8 pts−17.6 pts+12.5 pts
3 years+84.9%+69.1%−0.9 pts−16.7 pts−22.4 pts−38.2 pts
Since launch
FDN Jun 2006 · IBB Feb 2001
+1,374.7%+525.3%+568.3 pts−299.7 pts−827.8 pts−936.3 pts

Source: ETFIQ. Open the live comparison on ETFIQ →

On the same fields

FDN
First Trust Dow Jones Internet Index Fund · Holds 41 stocks in internet and e-commerce, 83% of its weight in S&P 500 companies
IBB
iShares Biotechnology ETF · Holds 245 stocks in biotech, 40% of its weight in S&P 500 companies
Issuer First Trust iShares
Theme Internet and e-commerce Biotech
In the S&P 500 82.6% 39.5%
Active share vs the S&P 500 85.5% 99.0%
In the Nasdaq-100 60.9% 33.1%
Holdings 41 245
Top ten, share of the fund 62.5% 49.9%
Expense ratio 0.49% 0.44%
Fee for the differing part 0.57% 0.44%
Total return, 1 year +6.0% +36.1%
vs the S&P 500 −11.3 pts +18.8 pts
vs the Nasdaq-100 −17.6 pts +12.5 pts
Below its high 0.0% −4.8%
Net assets, as of Oct 8, 2026 $5.4bn $10.3bn

As of Oct 9, 2026. Source: ETFIQ.

FDN in plain words

By weight, 83% of FDN's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 86%. The top ten holdings are 62% of the fund across 41 positions, as published by its issuer for Oct 8, 2026. Over the year to Oct 9, 2026 the fund returned +6.0% with distributions reinvested against +17.3% for the S&P 500, so a holder was behind by 11.3 pts.

IBB in plain words

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 8, 2026. Over the year to Oct 9, 2026 the fund returned +36.1% with distributions reinvested against +17.3% for the S&P 500, so a holder was ahead by 18.8 pts.

Questions people ask

Do FDN and IBB hold the same stocks?
By their latest filings, 0% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.
Which is more different from the S&P 500, FDN or IBB?
FDN has 83% of its weight in S&P 500 names and IBB has 40%, so IBB differs more from the index.
Which is cheaper, FDN or IBB?
FDN charges 0.49% a year and IBB charges 0.44%, so IBB is cheaper. Fees come from each fund's prospectus.
Other comparisons
FDN vs XBIFDN vs GRIDFDN vs BOTZFDN vs SMHIBB vs KWEBIBB vs URAIBB vs XARIBB vs SHLD
FDN on its own →IBB on its own →How every figure is computed →Standards and sources →
Where these figures came from
FDN filings on SEC EDGAR ↗FDN prospectus with the expense ratio (SEC) ↗First Trust page for FDN ↗IBB filings on SEC EDGAR ↗IBB prospectus with the expense ratio (SEC) ↗iShares page for IBB ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.

How this is computed

It is a position in a set, not a rating, and neither end of it is a recommendation.

Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed.

Every figure is an ETFIQ calculation with distributions reinvested.

Cite this page

ETFIQ, FDN against IBB, data as of Oct 9, 2026. https://etfiq.com/compare/themes/fdn-vs-ibb

Open data

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