Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IWC vs MBB: how they differ
IWC is an equity index fund and MBB a bond index fund, and over the year IWC returned more, +31.3% against −0.1%.
iShares Micro-Cap ETF and iShares MBS ETF.
| IWC iShares Micro-Cap ETF | MBB iShares MBS ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | iShares |
| What it is | Russell Microcap | Mbs |
| Total return, 1 year | +31.3% | −0.1% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +13.8 pts | −17.6 pts |
| Expense ratio | not published | 0.04% |
| Holdings | not filed | 11144 |
IWC in plain words
IWC is an index equity fund tracking the Russell Microcap. Over the year to Sep 11, 2026 it returned +31.3% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. It sat 5.0% below its high of Aug 14, 2026 on Sep 11, 2026.
MBB in plain words
MBB is a bond fund tracking the Mbs. Over the year to Sep 11, 2026 it returned −0.1% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.04% a year. It sat 3.3% below its high of Feb 27, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, IWC or MBB?
- In the year to Sep 12, 2026, with distributions reinvested, IWC returned +31.3% and MBB returned −0.1%, so IWC returned more. One year is one year; the longer windows are in the table.
Other comparisons
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, IWC against MBB, data as of Sep 12, 2026. https://etfiq.com/compare/any/IWC-MBB Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources