Data as of Oct 28, 2026.
IBB vs IDEV: Differences, Returns & Fees
Over the year to Oct 28, 2026, IBB returned +37.5% to IDEV's +13.4%, and IDEV charges 0.04% to IBB's 0.44%.
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Net assets: $11.0bn on Oct 27, 2026 for iShares Biotechnology ETF, and $34.0bn on Oct 28, 2026 for iShares Core MSCI International Developed Markets ETF.
Pair scorecard
IDEV costs 0.40 points a year less; their one-year returns differ by 24.1 points; IDEV is 3.1 times larger.
| Measure | IBB | IDEV |
|---|---|---|
| Return | ||
| Total return, 1 year | +37.5% | +13.4% |
| Drawdown | ||
| Below its high | 4.4%, high on Aug 25, 2026 | |
| Benchmark | ||
| What it tracks | Biotech | MSCI World ex USA Investable Market Index |
| Cost and size | ||
| Expense ratio | 0.44% | 0.04% |
| Net assets, as of Oct 26, 2026 | $10.7bn | $33.7bn |
| Active share vs the S&P 500 | 99% | |
| Holdings | ||
| Holdings in common | 0% | |
| Top ten holdings, share of the fund | 50% | 10.9% |
Holdings in common uses holdings dated Oct 27, 2026. Method
Risk and return
Mar 31, 2017 to Oct 23, 2026 · 499 weekly returnsIDEV returned slightly more: +127.7% to +117.7%. IDEV swung less: 17.0% to 22.9%. IDEV fell slightly less at its worst: −34.0% to −37.5%.
Full scorecard
9 measures, with how each is measured Open ↓
| Measure | IBB | IDEV | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +117.7% | +127.7% | IDEV (slight) | Price change plus distributions, reinvested. |
| Annualized | +8.4% | +9.0% | IDEV (slight) | Total return as a yearly rate. |
| Price return | +112.5% | +73.6% | IBB | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 22.9% | 17.0% | IDEV | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 15.6% | 12.1% | IDEV | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −37.5% | −34.0% | IDEV (slight) | Deepest fall from a high to the low after it. |
| Risk-adjusted | ||||
| Sharpe | 0.36 | 0.44 | IDEV | Return above Treasury bills per unit of volatility. |
| Sortino | 0.52 | 0.61 | IDEV | Return above Treasury bills per unit of downside deviation. |
| Calmar | 0.22 | 0.26 | IDEV | Annualized return divided by the max drawdown. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 499 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, IBB and IDEV hold 0% of their money in the same securities at the same weight. Holdings dated Oct 27, 2026.
half
0% in common
Only in one fund ↓
Side by side
IBB and IDEV on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IBB and IDEV do different jobs. What does each one do in a portfolio?
- What each follows. IBB follows Biotech and IDEV follows MSCI World ex USA Investable Market Index.
- Holdings in common. 0% of the weight is in the same securities (holdings dated Oct 27, 2026).
- One-year total return. Over 1 year to Oct 28, 2026 IBB returned +37.5% and IDEV +13.4% with distributions reinvested, a gap of 24.1 points.
Data as of Oct 28, 2026.
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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.
IDEV
IDEV tracks the MSCI International Developed Markets. Over the year to Oct 28, 2026 it returned +13.4% with distributions reinvested, against +14.3% for its benchmark, the MSCI ACWI ex USA Index. The prospectus expense ratio is 0.04% a year. By its holdings published by its issuer for Oct 27, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 2,317 positions, with the top ten at 10.9%. It sat 4.4% below its high of Aug 25, 2026 on Oct 28, 2026.
Questions people ask
- Are IBB and IDEV in the same category?
- IBB is a thematic ETF and IDEV 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 IDEV?
- In the year to Oct 28, 2026, with distributions reinvested, IBB returned +37.5% and IDEV +13.4%.
- Which is cheaper, IBB or IDEV?
- IDEV is cheaper, by 0.40 percentage points a year. That is about $40 on $10,000 held for a year. Fees come from each fund's prospectus.
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 IDEV, data as of Oct 28, 2026. https://etfiq.com/compare/any/ibb-vs-idev
ETFIQ. (Oct 28, 2026). IBB against IDEV. Retrieved from https://etfiq.com/compare/any/ibb-vs-idev
[IBB against IDEV (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/ibb-vs-idev)
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