Which returned more over the last year, IOO or SPYM?

In the year to Oct 9, 2026, with distributions reinvested, IOO returned +21.1% and SPYM +17.3%.

Which is cheaper, IOO or SPYM?

SPYM is cheaper, by 0.38 percentage points a year. That is about $38 on $10,000 held for a year. Fees come from each fund's prospectus.

How much do IOO and SPYM overlap with the S&P 500?

By their latest filed holdings, 79% of IOO and 100% of SPYM by weight is stocks the S&P 500 already holds.

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IOO vs SPYM: Differences, Returns & Fees

IOO and SPYM hold 51% of their weight in the same names, and IOO returned +21.1% over the year. Net assets: $9.4bn on Oct 9, 2026 for iShares Global 100 ETF, and $178.5bn on Oct 8, 2026 for State Street SPDR Portfolio S&P 500 ETF.

SPYM costs 0.38 points a year less; their one-year returns differ by 3.8 points; SPYM is 19.2 times larger.

IOO vs SPYM: Differences, Returns & Fees
	IOO	SPYM
Expense ratio	0.40%	0.02%
Net assets, as of Oct 8, 2026	$9.3bn	$178.5bn
Total return, 1 year	+21.1%	+17.3%
What it tracks	S&P Global 100	S&P 500 Index ?
Holdings in common	51%
Top ten holdings, share of the fund	59.9%	39.0%

Holdings in common uses holdings dated Oct 8, 2026 and Oct 9, 2026.

+21.1%

IOO total return, 1 year

+17.3%

SPYM total return, 1 year

0.40%

IOO expense ratio

0.02%

SPYM expense ratio

What they hold in common

By the books each fund has filed, IOO and SPYM hold 51% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Oct 8, 2026 and Oct 9, 2026.

50%

half

51% in common

Positions both hold, largest shared weight first

Holding IOO SPYM

NVIDIA 13.21% 8.33%

APPLE 11.70% 7.42%

MICROSOFT 9.46% 5.79%

AMAZON.COM INC 6.13% 3.72%

ALPHABET CLASS A 4.91% 3.05%

BROADCOM INC 4.10% 2.56%

ALPHABET CLASS C 3.94% 2.45%

ELI LILLY 2.25% 1.40%

JPMORGAN CHASE & CO 2.11% 1.31%

EXXONMOBIL HOLDINGS CORP 1.65% 1.03%

JOHNSON & JOHNSON 1.50% 0.92%

INTEL CORPORATION 1.24% 0.79%

Only in IOO

SAMSUNG ELECTRONICS LTD 2.12%

ASML HOLDING 1.65%

TENCENT HOLDINGS 0.80%

HSBC HOLDINGS PLC 0.75%

SHELL 0.69%

MITSUBISHI UFJ FINANCIAL GROUP 0.62%

NOVARTIS AG 0.62%

ASTRAZENECA PLC 0.58%

Only in SPYM

META PLATFORMS INC CLASS A 2.37%

MICRON TECHNOLOGY INC 1.75%

TESLA INC 1.58%

ADVANCED MICRO DEVICES 1.51%

BERKSHIRE HATHAWAY INC CL B 1.42%

VISA INC CLASS A SHARES 0.95%

ABBVIE INC 0.72%

PALANTIR TECHNOLOGIES INC A 0.68%

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On the same fields

IOO

iShares Global 100 ETF

SPYM

State Street SPDR Portfolio S&P 500 ETF

Where it sits Stock ETF Stock ETF

Issuer iShares State Street

What it is Tracks an index Tracks the S&P 500

Total return, 1 year +21.1% +17.3%

Its benchmark over the same days not published +17.3% (IVV)

Gap to its benchmark not available 0.0 pts vs IVV

Expense ratio 0.40% 0.02%

Already in the S&P 500 79.0% 99.8%

Holdings 104 506

Net assets, IOO as of Oct 9, 2026 and SPYM as of Oct 8, 2026 $9.4bn $178.5bn

Former ticker none SPLG

IOO and SPYM on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.

About IOO

IOO tracks an index. Over the year to Oct 9, 2026 it returned +21.1% with distributions reinvested. The prospectus expense ratio is 0.40% a year. By its holdings published by its issuer for Oct 9, 2026, 79% of the fund by weight is stocks the S&P 500 also holds, across 104 positions, with the top ten at 59.9%.

About SPYM

SPYM tracks the S&P 500. Over the year to Oct 9, 2026 it returned +17.3% with distributions reinvested, against +17.3% for its benchmark, the S&P 500 Index ?. The prospectus expense ratio is 0.02% a year. By its holdings published by its issuer for Oct 8, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 506 positions, with the top ten at 39.0%.

Questions people ask

Which returned more over the last year, IOO or SPYM?: In the year to Oct 9, 2026, with distributions reinvested, IOO returned +21.1% and SPYM +17.3%.
Which is cheaper, IOO or SPYM?: SPYM is cheaper, by 0.38 percentage points a year. That is about $38 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do IOO and SPYM overlap with the S&P 500?: By their latest filed holdings, 79% of IOO and 100% of SPYM by weight is stocks the S&P 500 already holds.

Other comparisons

IOO vs VIG IOO vs SCHX IOO vs IWB IOO vs QUAL SPYM vs THRO RECS vs SPYM SCHK vs SPYM SPYM vs USMC

IOO on its own →SPYM on its own →Hold both: look the portfolio through →Rankings →Standards and sources →

Where these figures came from

IOO filings on SEC EDGAR ↗IOO prospectus with the expense ratio (SEC) ↗iShares page for IOO ↗SPYM filings on SEC EDGAR ↗SPYM prospectus with the expense ratio (SEC) ↗State Street website ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. 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, IOO against SPYM, data as of Oct 9, 2026. https://etfiq.com/compare/any/ioo-vs-spym

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.