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IYY vs SPY: Differences, Returns & Fees

IYY and SPY hold 93% of their weight in the same names. Net assets: $3.1bn on Oct 9, 2026 for iShares Dow Jones U.S. ETF, and $817.2bn on Oct 8, 2026 for SPDR S&P 500 ETF Trust.

SPY costs 0.11 points a year less; their one-year returns differ by 0.5 points; SPY is far larger, $817.2bn against $3.0bn.

IYY vs SPY: Differences, Returns & Fees
IYYSPY
Expense ratio0.20%0.09%
Net assets, as of Oct 8, 2026$3.0bn$817.2bn
Total return, 1 year+16.8%+17.3%
What it tracksDow Jones U.S. IndexS&P 500 Index
Holdings in common93%
Top ten holdings, share of the fund36.4%39.1%

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

+16.8%
IYY total return, 1 year
+17.3%
SPY total return, 1 year
0.20%
IYY expense ratio
0.09%
SPY expense ratio

What they hold in common

By the books each fund has filed, IYY and SPY hold 93% 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.

half

93% in common

Positions both hold, largest shared weight first
Holding IYY SPY
NVIDIA 7.68% 8.34%
APPLE 6.80% 7.42%
MICROSOFT 5.50% 5.80%
AMAZON.COM INC 3.56% 3.73%
ALPHABET CLASS A 2.86% 3.06%
BROADCOM INC 2.38% 2.56%
ALPHABET CLASS C 2.29% 2.45%
META PLATFORMS CLASS A 2.19% 2.38%
MICRON TECHNOLOGY 1.61% 1.75%
TESLA INC 1.49% 1.58%
ADVANCED MICRO DEVICES 1.37% 1.51%
BERKSHIRE HATHAWAY INC CLASS B 1.33% 1.42%
Only in IYY
SPACE EXPLORATION TECHNOLOGIES COR 0.31%
SNOWFLAKE 0.18%
CLOUDFLARE CLASS A 0.16%
CHENIERE ENERGY 0.08%
NATERA 0.08%
STRATEGY INC CLASS A 0.08%
ASTERA LABS 0.07%
ANGLOGOLD ASHANTI PLC 0.06%
Only in SPY

Check overlap with more funds →

On the same fields

IYY
iShares Dow Jones U.S. ETF
SPY
SPDR S&P 500 ETF Trust
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 +16.8% +17.3%
Its benchmark over the same days not published +17.3% (VOO)
Gap to its benchmark not available −0.1 pts vs VOO
Expense ratio 0.20% 0.09%
Already in the S&P 500 92.0% 99.8%
Holdings 941 504
Net assets, IYY as of Oct 9, 2026 and SPY as of Oct 8, 2026 $3.1bn $817.2bn

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

About IYY

IYY tracks an index. Over the year to Oct 9, 2026 it returned +16.8% with distributions reinvested. The prospectus expense ratio is 0.20% a year. By its holdings published by its issuer for Oct 9, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 941 positions, with the top ten at 36.4%.

About SPY

SPY 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 0.09% 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 504 positions, with the top ten at 39.1%.

Questions people ask

Which returned more over the last year, IYY or SPY?
In the year to Oct 9, 2026, with distributions reinvested, IYY returned +16.8% and SPY +17.3%.
Which is cheaper, IYY or SPY?
SPY is cheaper, by 0.11 percentage points a year. That is about $11 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do IYY and SPY overlap with the S&P 500?
By their latest filed holdings, 92% of IYY and 100% of SPY by weight is stocks the S&P 500 already holds.
Other comparisons
IYY vs VTIIYY vs VOOIVV vs IYYIYY vs SPYMSNPE vs SPYBDYN vs SPYSPY vs USCLSPY vs SPYX
IYY on its own →SPY on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
IYY filings on SEC EDGAR ↗IYY prospectus with the expense ratio (SEC) ↗iShares page for IYY ↗SPY filings on SEC EDGAR ↗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.

Cite this pageCitation, APA and Markdown

ETFIQ, IYY against SPY, data as of Oct 9, 2026. https://etfiq.com/compare/any/iyy-vs-spy

Open data

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