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Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.

ETFIQetfiq.com · independent ETF data

IUSB vs VBK: how they differ

IUSB and VBK hold 0% of their weight in the same names, and VBK returned more over the year.

iShares Core Universal USD Bond ETF and Vanguard Small-Cap Growth Index Fund.

What they hold in common

By the books each fund has filed, IUSB and VBK hold 0% of their money in the same securities at the same weight.

Largest positions each one holds and the other does not
Only in IUSBOnly in VBK
United States of America 0.38%Credo Technology Group Holding Ltd 1.27%
United States of America 0.37%REVOLUTION Medicines Inc 1.07%
United States of America 0.37%Astera Labs Inc 1.05%
United States of America 0.37%Natera Inc 1.04%
United States of America 0.36%Twilio Inc 0.88%
United States of America 0.36%Casey's General Stores Inc 0.83%
United States of America 0.36%Carpenter Technology Corp 0.82%
United States of America 0.35%Curtiss-Wright Corp 0.79%

Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Apr 30, 2026 and Jun 30, 2026.

IUSB and VBK on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
IUSB
iShares Core Universal USD Bond ETF
VBK
Vanguard Small-Cap Growth Index Fund
Where it sitsCore index fundCore index fund
IssueriSharesVanguard
What it isCore Universal USD BondSmall-Cap Growth
Total return, 1 year−0.3%+13.8%
S&P 500 over the same days+17.5%+17.5%
Gap to the S&P 500−17.8 pts−3.7 pts
Expense ratio0.06%0.05%
Holdings17819545

IUSB in plain words

IUSB is a bond fund tracking the Core Universal USD Bond. Over the year to Sep 11, 2026 it returned −0.3% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.06% a year.

VBK in plain words

VBK is an index equity fund tracking the Small-Cap Growth. Over the year to Sep 11, 2026 it returned +13.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.05% a year. By its holdings filed for Jun 30, 2026, 10% of the fund by weight is stocks the S&P 500 also holds, across 545 positions, with the top ten at 9.3%. It sat 7.0% below its high of Aug 17, 2026 on Sep 11, 2026.

Questions people ask

Which returned more over the last year, IUSB or VBK?
In the year to Sep 12, 2026, with distributions reinvested, IUSB returned −0.3% and VBK returned +13.8%, so VBK returned more. One year is one year; the longer windows are in the table.
Which is cheaper, IUSB or VBK?
IUSB charges 0.06% a year and VBK charges 0.05%, so VBK is cheaper. Fees come from each fund's prospectus.

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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.

IUSB against VBK, ETFIQ, data as of Sep 12, 2026. Every figure is arithmetic on a named public source; the method is at etfiq.com/methodology. A comparison is not a recommendation.

Cite this page. ETFIQ, IUSB against VBK, data as of Sep 12, 2026. https://etfiq.com/compare/any/IUSB-VBK Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources