Data as of Oct 28, 2026.

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IUSB vs VOO: Differences, Returns & Fees

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Over the year to Oct 28, 2026, IUSB returned −1.2% to VOO's +13.7%; 0% of their weight is in the same names.

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Net assets: $49.8bn on Oct 27, 2026 for iShares Core Universal USD Bond ETF, and $1.0tn on Sep 30, 2026 for Vanguard S&P 500 ETF.

At a glance
−1.2%
IUSB total return, 1 year
+13.7%
VOO total return, 1 year
0.06%
IUSB expense ratio
0.03%
VOO expense ratio

Pair scorecard

VOO costs 0.03 points a year less; their one-year returns differ by 14.9 points; VOO is far larger, $1.0tn against $48.1bn.

IUSB vs VOO: Differences, Returns & Fees
MeasureIUSBVOO
Return
Total return, 1 year−1.2%+13.7%
Benchmark
What it tracksBloomberg U.S. Universal IndexS&P 500 Index
Cost and size
Expense ratio0.06%0.03%
Net assets, as of Sep 30, 2026$48.1bn$1.0tn
Holdings
Holdings in common0%
In the S&P 500, by weight100%
Top ten holdings, share of the fund39.1%

Holdings in common uses holdings dated Sep 30, 2026 and Oct 27, 2026. Method

What they share

0%

By the books each fund has filed, IUSB and VOO hold 0% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 27, 2026.

0 half 100%

half

0% in common

Positions both hold · largest shared weight first IUSB VOO
Only in one fund ↓
Only in IUSB
BLK Liquidity Temp Cash Inst #21 4.75%
TREASURY NOTE 0.49%
TREASURY NOTE 0.42%
TREASURY NOTE 0.41%
TREASURY NOTE 0.38%
TREASURY NOTE 0.37%
TREASURY NOTE (2OLD) 0.36%
UMBS 15YR TBA(REG B) 0.35%
Only in VOO
NVIDIA Corp 8.40%
Apple Inc 7.39%
Microsoft Corp 5.79%
Amazon.com Inc 3.72%
Alphabet Inc 3.07%
Broadcom Inc 2.54%
Alphabet Inc 2.46%
Meta Platforms Inc 2.43%
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Side by side

IUSB iShares Core Universal USD Bond ETF VOO Vanguard S&P 500 ETF
Where it sits Bond ETF Stock ETF
What it is Tracks an index of Universal USD Bond Tracks the S&P 500
Total return, 1 year −1.2% +13.7%
Its benchmark over the same days not measured +13.7% (IVV)
Gap to its benchmark not measured 0.0 pts vs IVV
Expense ratio 0.06% 0.03%
Holdings 18338 507
Net assets, IUSB as of Oct 27, 2026 and VOO as of Sep 30, 2026 $49.8bn $1.0tn

IUSB and VOO on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.

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About each fund
IUSB

IUSB tracks an index of Universal USD Bond. Over the year to Oct 28, 2026 it returned −1.2% with distributions reinvested. The prospectus expense ratio is 0.06% a year.

VOO

VOO tracks the S&P 500. Over the year to Oct 28, 2026 it returned +13.7% with distributions reinvested, against +13.7% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer as of Sep 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 507 positions, with the top ten at 39.1%.

Questions people ask

Which returned more over the last year, IUSB or VOO?
In the year to Oct 28, 2026, with distributions reinvested, IUSB returned −1.2% and VOO +13.7%.
Which is cheaper, IUSB or VOO?
VOO is cheaper, by 0.03 percentage points a year. That is about $3 on $10,000 held for a year. Fees come from each fund's prospectus.
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ETFIQ, IUSB against VOO, data as of Oct 28, 2026. https://etfiq.com/compare/any/iusb-vs-voo

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