etf overlap tool · little overlap
EFA vs CSPX overlap
EFA and CSPX 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 CSPX against 10% of EFA.
Holdings as of October 16, 2026 · source: iShares (EFA), iShares (CSPX) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold EFA and CSPX with other funds or stocks? The free portfolio optimizer opens EFA and CSPX 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
AMZNAMAZON.COM INC3.72%No stock in common, 66% in the same sectors
EFA and CSPX: what people ask
How much do EFA and CSPX 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 EFA and CSPX both hold?
None. EFA and CSPX have no holding in common.
Is it redundant to hold both EFA and CSPX?
No. Out of every $100 split evenly between them, none buys the same company. Half in each gives you 1,158 different holdings that behave like 145 equally weighted stocks, against 194 for EFA alone and 44 for CSPX alone. Whether that mix suits you depends on what you want to own; this is a description, not advice.
What is CSPX, next to EFA?
CSPX is iShares Core S&P 500 UCITS ETF (ISIN IE00B5BMR087), an Irish-domiciled UCITS fund on the S&P 500 index. Next to EFA, it holds no company in common, as of October 16, 2026.
Does the EFA vs CSPX overlap apply to other tickers?
Yes. CSPX also trades as CSP1 (London, GBP), SXR8 (Xetra, EUR) and CSSPX (Borsa Italiana, EUR). Each is the same portfolio in another currency, on another exchange or paying its dividends out, so EFA and SXR8 share no company either.
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 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.