A
vs
B
Share
Compare their flowsAsk IQ about these two funds

IYY vs SPYM: Differences, Returns & Fees

IYY and SPYM 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 $178.5bn on Oct 8, 2026 for State Street SPDR Portfolio S&P 500 ETF.

SPYM costs 0.18 points a year less; their one-year returns differ by 0.5 points; SPYM is far larger, $178.5bn against $3.0bn.

IYY vs SPYM: Differences, Returns & Fees
IYYSPYM
Expense ratio0.20%0.02%
Net assets, as of Oct 8, 2026$3.0bn$178.5bn
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%39.0%

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

+16.8%
IYY total return, 1 year
+17.3%
SPYM total return, 1 year
0.20%
IYY expense ratio
0.02%
SPYM expense ratio

What they hold in common

By the books each fund has filed, IYY and SPYM 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 SPYM
NVIDIA 7.68% 8.33%
APPLE 6.80% 7.42%
MICROSOFT 5.50% 5.79%
AMAZON.COM INC 3.56% 3.72%
ALPHABET CLASS A 2.86% 3.05%
BROADCOM INC 2.38% 2.56%
ALPHABET CLASS C 2.29% 2.45%
META PLATFORMS CLASS A 2.19% 2.37%
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 SPYM
S+P500 EMINI FUT DEC26 0.00%
CONTRA WALGREENS BOOTS 0.00%

Check overlap with more funds →

On the same fields

IYY
iShares Dow Jones U.S. 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 +16.8% +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 0.20% 0.02%
Already in the S&P 500 92.0% 99.8%
Holdings 941 506
Net assets, IYY as of Oct 9, 2026 and SPYM as of Oct 8, 2026 $3.1bn $178.5bn
Former ticker none SPLG

IYY and SPYM 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 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, IYY or SPYM?
In the year to Oct 9, 2026, with distributions reinvested, IYY returned +16.8% and SPYM +17.3%.
Which is cheaper, IYY or SPYM?
SPYM is cheaper, by 0.18 percentage points a year. That is about $18 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do IYY and SPYM overlap with the S&P 500?
By their latest filed holdings, 92% of IYY and 100% of SPYM by weight is stocks the S&P 500 already holds.
Other comparisons
IYY vs SPYIYY vs VIGITOT vs IYYIYY vs SCHXSNPE vs SPYMBDYN vs SPYMSPYM vs USCLSPYM vs SPYX
IYY on its own →SPYM 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 ↗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.

Cite this pageCitation, APA and Markdown

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

Open data

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