Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
DIA vs SPY: how they differ
DIA and SPY hold 29% of their weight in the same names, and SPY returned more over the year.
SPDR Dow Jones Industrial Average ETF Trust and SPDR S&P 500 ETF Trust.
What they hold in common
By the books each fund has filed, DIA and SPY hold 29% of their money in the same securities at the same weight.
| Holding | DIA | SPY |
|---|---|---|
| MICROSOFT CORP | 5.61% | 5.59% |
| APPLE INC | 3.72% | 7.33% |
| ALPHABET INC CL A | 3.79% | 2.98% |
| AMAZON.COM INC | 2.87% | 3.77% |
| NVIDIA CORP | 2.49% | 8.08% |
| JPMORGAN CHASE + CO | 4.03% | 1.45% |
| JOHNSON + JOHNSON | 3.03% | 0.98% |
| VISA INC CLASS A SHARES | 4.18% | 0.93% |
| WALMART INC | 1.20% | 0.71% |
| CISCO SYSTEMS INC | 1.22% | 0.65% |
| CHEVRON CORP | 2.42% | 0.61% |
| CATERPILLAR INC | 9.17% | 0.57% |
| Only in DIA | Only in SPY |
|---|---|
| BROADCOM INC 2.61% | |
| ALPHABET INC CL C 2.39% | |
| META PLATFORMS INC CLASS A 2.16% | |
| MICRON TECHNOLOGY INC 1.69% | |
| TESLA INC 1.56% | |
| BERKSHIRE HATHAWAY INC CL B 1.42% | |
| ELI LILLY + CO 1.36% | |
| ADVANCED MICRO DEVICES 1.25% |
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 Sep 10, 2026.
| DIA SPDR Dow Jones Industrial Average ETF Trust | SPY SPDR S&P 500 ETF Trust | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | State Street | State Street |
| What it is | Dow Jones Industrial Average | S&P 500 |
| Total return, 1 year | +15.6% | +17.5% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −1.9 pts | 0.0 pts |
| Expense ratio | not published | 0.09% |
| Already in the S&P 500 | 97.1% | 100.0% |
| Holdings | 31 | 505 |
DIA in plain words
DIA is an index equity fund tracking the Dow Jones Industrial Average. Over the year to Sep 11, 2026 it returned +15.6% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. By its holdings filed for Sep 10, 2026, 97% of the fund by weight is stocks the S&P 500 also holds, across 31 positions, with the top ten at 55.1%. It sat 3.1% below its high of Aug 5, 2026 on Sep 11, 2026.
SPY in plain words
SPY is an index equity fund tracking the S&P 500. Over the year to Sep 11, 2026 it returned +17.5% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.09% a year. By its holdings filed for Sep 10, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 505 positions, with the top ten at 38.2%.
Questions people ask
- Which returned more over the last year, DIA or SPY?
- In the year to Sep 13, 2026, with distributions reinvested, DIA returned +15.6% and SPY returned +17.5%, so SPY returned more. One year is one year; the longer windows are in the table.
- How much do DIA and SPY overlap with the S&P 500?
- By their latest filed holdings, 97% of DIA and 100% of SPY by weight is stocks the S&P 500 already holds. Between the two funds, 29% of their books are the same securities at the same weight.
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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.
Cite this page. ETFIQ, DIA against SPY, data as of Sep 13, 2026. https://etfiq.com/compare/any/dia-vs-spy Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources