etf overlap tool · heavy overlap
SMH vs SOXX overlap
96% of SMH's money sits in companies SOXX also holds; 70% of the two funds is the same money, spread over 23 companies both hold.
Holdings as of October 16, 2026 · source: VanEck (SMH), iShares (SOXX) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Swapping one for the other to harvest a loss? In our study of 32 tax-loss harvesting ETF pairs, SMH and SOXX correlated 0.9872 over the 261 weeks to October 16, 2026 and were more than 1 point apart in 20.3% of weeks; over the year to that date, SOXX returned 13.82 points more than SMH. IRS Publication 550 sets no test for when two ETFs are “substantially identical” under the wash-sale rule: it says to consider “all the facts and circumstances in your particular case,” so no correlation figure settles the question.
Hold SMH and SOXX with other funds or stocks? The free portfolio optimizer opens SMH and SOXX 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
CRDOCREDO TECHNOLOGY GROUP HOLDING LTD1.63%SMH and SOXX: what people ask
How much do SMH and SOXX overlap?
70% by weight, as of October 16, 2026: heavy overlap. 23 companies appear in both funds; they make up 96% of SMH and 93% of SOXX.
Which stocks do SMH and SOXX both hold?
The largest shared positions are NVDA, AVGO, AMD, MU and ADI. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both SMH and SOXX?
Out of every $100 split evenly between them, about $70 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 2 names only in SMH, 7 only in SOXX. Half in each behaves like 17 equally weighted stocks, against 13 for SMH alone and 19 for SOXX 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 VanEck 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.