etf overlap tool · little overlap
SPY vs EFA overlap
SPY and EFA hold no company in common. Still, 66% of their money sits in the same sectors, led by Financials; they part most on Information Technology: 38% of SPY against 10% of EFA.
Holdings as of October 16, 2026 · source: SPDR (SPY), iShares (EFA) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold SPY and EFA with other funds or stocks? The free portfolio optimizer opens SPY and EFA 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.
What only one of them gives you
NVDANVIDIA CORP7.85%
AAPLAPPLE INC7.59%
MSFTMICROSOFT CORP5.95%
AMZNAMAZON.COM INC3.72%
GOOGALPHABET INC CL C2.43%
AVGOBROADCOM INC2.37%No stock in common, 66% in the same sectors
SPY and EFA: what people ask
How much do SPY and EFA overlap?
None by holdings, as of October 16, 2026: no company appears in both funds. By sector, 66% of their money sits in the same sectors, led by Financials.
Which stocks do SPY and EFA both hold?
None. SPY and EFA have no holding in common.
Is it redundant to hold both SPY and EFA?
No. Out of every $100 split evenly between them, none buys the same company. Half in each gives you 1,159 different holdings that behave like 145 equally weighted stocks, against 44 for SPY alone and 194 for EFA alone. Whether that mix suits you depends on what you want to own; 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 SPDR 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.