etf overlap tool · light overlap
VUG vs DIA overlap
21% of VUG and DIA is the same money, spread over 8 companies both funds hold.
Holdings as of September 30, 2026 · source: Vanguard (VUG), SPDR (DIA) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold VUG and DIA with other funds or stocks? The free portfolio optimizer opens VUG and DIA beside the rest of what you own: the companies you hold twice, what the funds cost a year, and where the next deposit should go. No account.
The companies you would own twice
What only one of them gives you
Where each fund puts its money
VUG and DIA: what people ask
How much do VUG and DIA overlap?
21% by weight, as of September 30, 2026: light overlap. 8 companies appear in both funds; they make up 47% of VUG and 29% of DIA.
Which stocks do VUG and DIA both hold?
The largest shared positions are MSFT, AAPL, GOOGL, AMZN and NVDA. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both VUG and DIA?
Out of every $100 split evenly between them, about $21 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 127 names only in VUG, 22 only in DIA. Half in each behaves like 29 equally weighted stocks, against 17 for VUG alone and 22 for DIA alone. Whether that duplication is a problem depends on the mix you want; this is a description, not advice.
How is ETF overlap calculated here?
For every company held by both funds we take the smaller of its two weights and add them up. The weights come from the full holdings files Vanguard and SPDR publish, not a top-10 sample, and companies are matched by their ISIN so share classes stay apart. Sector overlap applies the same rule to the issuers' sector labels; "behaves like N equally weighted stocks" is one over the sum of the squared weights.
Weights come from each issuer's published holdings file and are matched company by company on their ISIN. Cash, futures and currency positions are left out. This page describes what the funds hold; it is not investment advice.