Data as of Oct 28, 2026.
IYW vs MBB: Differences, Returns & Fees
Over the year to Oct 28, 2026, IYW returned +23.2% to MBB's −0.8%; 0% of their weight is in the same names.
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Net assets: $25.0bn on Oct 27, 2026 for iShares U.S. Technology ETF, and $35.5bn on Oct 28, 2026 for iShares MBS ETF.
Pair scorecard
MBB costs 0.33 points a year less; their one-year returns differ by 24.0 points; MBB is 1.4 times larger.
| Measure | IYW | MBB |
|---|---|---|
| Return | ||
| Total return, 1 year | +23.2% | −0.8% |
| Drawdown | ||
| Below its high | 5.5%, high on Oct 6, 2026 | |
| Benchmark | ||
| What it tracks | Russell 1000 Technology RIC 22 | Bloomberg U.S. MBS Index |
| Cost and size | ||
| Expense ratio | 0.37% | 0.04% |
| Net assets, as of Oct 26, 2026 | $24.6bn | $35.6bn |
| Holdings | ||
| Holdings in common | 0% | |
| In the S&P 500, by weight | 94% | |
| Top ten holdings, share of the fund | 65.1% | |
Holdings in common uses holdings dated Oct 27, 2026. Method
What they share
By the books each fund has filed, IYW and MBB 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
IYW and MBB on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IYW
IYW tracks an index of U.S. Technology. Over the year to Oct 28, 2026 it returned +23.2% with distributions reinvested, against +13.1% for its benchmark, the Russell 1000 Index. The prospectus expense ratio is 0.37% a year. By its holdings published by its issuer for Oct 27, 2026, 94% of the fund by weight is stocks the S&P 500 also holds, across 150 positions, with the top ten at 65.1%. It sat 5.5% below its high of Oct 6, 2026 on Oct 28, 2026.
MBB
MBB tracks an index of mortgage-backed securities. Over the year to Oct 28, 2026 it returned −0.8% with distributions reinvested, against −1.1% for its benchmark, the Bloomberg U.S. MBS Index. The prospectus expense ratio is 0.04% a year.
Questions people ask
- Which returned more over the last year, IYW or MBB?
- In the year to Oct 28, 2026, with distributions reinvested, IYW returned +23.2% and MBB −0.8%.
- Which is cheaper, IYW or MBB?
- MBB is cheaper, by 0.33 percentage points a year. That is about $33 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, IYW against MBB, data as of Oct 28, 2026. https://etfiq.com/compare/any/iyw-vs-mbb
ETFIQ. (Oct 28, 2026). IYW against MBB. Retrieved from https://etfiq.com/compare/any/iyw-vs-mbb
[IYW against MBB (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/iyw-vs-mbb)
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