FBT vs IBB: holdings overlap, shared companies and scores
As of September 11, 2026, FBT and IBB overlap 43.7% by weight. First Trust NYSE Arca Biotechnology Index Fund (FBT): U.S. biotech stocks. iShares Biotechnology ETF (IBB): U.S. biotechnology stocks.
Updated September 11, 2026
How much do FBT and IBB overlap?
As of September 11, 2026, FBT and IBB overlap 43.7% by weight.
89% of FBT is already inside IBB.
59% of IBB is already inside FBT.
FBT holds 30 companies and IBB holds 239; 27 are in both.
Computed by ETF Copilot from both funds' holdings rather than quoted from a data provider, and rebuilt nightly.
How does ETF Copilot score FBT and IBB?
As of September 11, 2026, ETF Copilot scores FBT 4.6 out of 10 and IBB 3.1 out of 10.
They differ most on Growth: FBT 5.4 and IBB 1.9.
The five factor scores behind them are set out below, 0–10 and higher is better, ranked against every US equity ETF we track.
| Factor | FBT | IBB |
|---|---|---|
| Growth | 5.4 | 1.9 |
| Valuation | 4.0 | 3.5 |
| Risk | 4.1 | 4.2 |
| Quality | 3.2 | 3.4 |
| Return | 5.4 | 3.1 |
IBB is the cheaper of the two at 0.44% a year
As of September 11, 2026, FBT charges 0.55% a year, yields 0.23% and holds $2.9B in assets across 30 positions.
As of September 11, 2026, IBB charges 0.44% a year, yields 0.46% and holds $10.7B in assets across 239 positions.
| Measure | FBT | IBB |
|---|---|---|
| Expense ratio | 0.55% | 0.44% |
| Dividend yield | 0.23% | 0.46% |
| Assets under management | $2.9B | $10.7B |
| Holdings | 30 | 239 |
Expense ratio, dividend yield and assets under management are reported by the fund and refreshed daily. Every other figure on this page is computed by ETF Copilot.
Where FBT and IBB trade against their own history
FBT trades at 23.8 times earnings, against its own median of 23.6, and is more expensive than 51% of its own 114 monthly readings since 2017.
IBB trades at 22.7 times earnings, against its own median of 21.5, and is more expensive than 60% of its own 114 monthly readings since 2017.
What moved FBT and IBB this week
FBT fell 4.4% in the week to September 11, 2026. The holdings that moved it most were Amgen (−15.0%), Sarepta Therapeutics (−11.0%) and Bruker (−10.1%); Axsome Therapeutics (+6.0%) pushed the other way.
IBB fell 5.1% in the week to September 11, 2026. The holdings that moved it most were Amgen (−15.0%), Vertex Pharmaceuticals (−7.6%) and Regeneron Pharmaceuticals (−7.3%); Roivant Sciences (+18.6%) pushed the other way.
What do FBT and IBB each hold?
38% of FBT is its ten largest holdings.
What's inside IBB: AI 1%.
48% of IBB is its ten largest holdings.
Compare with similar funds
Cite this
ETF Copilot, “FBT vs IBB holdings overlap and scores”, as of September 11, 2026.
https://etf-copilot.com/compare/fbt-vs-ibb
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