etf overlap tool · light overlap
VO vs IWDA overlap
98% of VO's money sits in companies IWDA also holds; 12% of the two funds is the same money, spread over 263 companies both hold.
Holdings as of September 30, 2026 · source: Vanguard (VO), iShares (IWDA) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold VO and IWDA with other funds or stocks? The free portfolio optimizer opens VO and IWDA 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
AMZNAMAZON.COM INC2.66%Where each fund puts its money
VO and IWDA: what people ask
How much do VO and IWDA overlap?
12% by weight, as of September 30, 2026: light overlap. 263 companies appear in both funds; they make up 98% of VO and 12% of IWDA.
Which stocks do VO and IWDA both hold?
The largest shared positions are MPC, VLO, NEM, PSX and FTNT. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both VO and IWDA?
Out of every $100 split evenly between them, about $12 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 8 names only in VO, 985 only in IWDA. Half in each behaves like 226 equally weighted stocks, against 206 for VO alone and 85 for IWDA alone. Whether that duplication is a problem depends on the mix you want; this is a description, not advice.
What is IWDA, next to VO?
IWDA is iShares Core MSCI World UCITS ETF (ISIN IE00B4L5Y983), an Irish-domiciled UCITS fund on the MSCI World index. Next to VO, 12% of the money is the same, spread over 263 companies both hold, as of September 30, 2026.
Does the VO vs IWDA overlap apply to other tickers?
Yes. IWDA also trades as SWDA (London, GBP; Borsa Italiana, EUR) and EUNL (Xetra, EUR). Each is the same portfolio in another currency, on another exchange or paying its dividends out, so VO vs EUNL also overlaps 12%.
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 iShares 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.