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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →The reliable way to evaluate a semiconductor ETF is to read its index rules, download a holdings file dated the same day you are comparing funds, calculate top-one/top-five/top-ten weights, and then compare all-in costs rather than headline expense ratios alone. A fund with dozens of lines can still be dominated by a few companies, while a slightly cheaper fund can cost more in practice if turnover and trading spreads are higher.
The examples below show how to analyze SOXX, SMH and XSD without treating their tickers as interchangeable. The figures are tied to the dates and documents that reported them; holdings, weights and expenses can change.
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What you are really evaluating
A semiconductor ETF is not a single, uniform exposure. It is a wrapper around an index methodology, a portfolio-construction process and a set of operating costs. Your evaluation should answer four separate questions:
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errors- What can the index own? Check eligible exchanges, market-cap and liquidity screens, sector definitions, geographic limits, rebalancing rules and any minimum-investment policy.
- What does the fund own today? Use a dated holdings file, not a ticker description or an old article.
- How concentrated is the exposure? Count holdings, but also measure the largest position and cumulative weights of the top five and top ten.
- What does the exposure cost and what can make it lose money? Compare management fees, total operating expenses, turnover, trading frictions, tax effects and the risks disclosed in the prospectus.
These questions are related but not interchangeable. A low fee does not make a concentrated portfolio diversified, and a large holdings count does not prove that the companies contribute equally to risk.
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Read the index methodology before the holdings list
The index name tells you more than the ETF ticker. Open the latest prospectus and index methodology and record the rules that determine eligibility and weights.
Eligible companies and listing rules
Determine whether the index requires a U.S. listing, a particular domicile, or both. “U.S.-listed” means a security trades on a U.S. exchange; it does not automatically mean that the issuer, factories or revenues are U.S.-based. A U.S.-listed foreign issuer can add currency, political and regulatory exposure that is not obvious from the exchange listing.
Weighting method
Find out whether constituents are weighted by market capitalization, modified market capitalization, equal weight, a capped formula or another rule. Weighting determines whether the largest companies dominate. A cap can limit any one issuer, but it does not necessarily prevent the top five from representing most of the fund after prices move.
Rebalancing and reconstitution
Record the scheduled review dates and the rules for additions, deletions and weight resets. Rebalancing can change concentration even when the underlying businesses have not changed. Use the prospectus wording rather than assuming that every semiconductor index rebalances on the same schedule.
Investment policy
Some funds promise to invest a stated percentage of assets in index securities. VanEck’s prospectus says SMH normally invests at least 80% of its assets in securities in the MVIS US Listed Semiconductor 25 Index. The 80% policy is a floor, not a guarantee that the portfolio is broadly diversified; the remaining assets and the index itself still matter.
Sampling versus full replication
A fund may own every index constituent or use representative sampling. State Street’s XSD prospectus says the fund may use representative sampling rather than owning every security in the S&P Semiconductor Select Industry Index. Sampling can make the holdings list differ from the index and can create tracking differences, so compare the actual portfolio with the index methodology.
What the three example funds say about their mandates
| Fund | Documented mandate or index | What the stated rule implies |
|---|---|---|
| SOXX | The iShares Semiconductor ETF seeks to track an index composed of U.S.-listed equities in the semiconductor sector, according to the iShares prospectus. | “U.S.-listed” describes the listing universe; inspect the index rules for country, sector and weighting details. |
| SMH | MVIS US Listed Semiconductor 25 Index; normally at least 80% of assets in index securities. | The index is designed around 25 securities as described in VanEck’s prospectus as of December 31, 2025, so a small constituent set can produce meaningful concentration. |
| XSD | S&P Semiconductor Select Industry Index; representative sampling may be used. | The fund’s portfolio can differ from a complete index constituent list; verify the current holdings file and tracking results. |
Build a holdings snapshot with an explicit date
Holdings are perishable facts. Save the file, its “as of” date and the retrieval date before making a comparison. The number of positions and each weight can change with index reviews, corporate actions and market movements.
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Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →- Download the official holdings file. Use the issuer’s portfolio page or shareholder documents, and note whether the file is end-of-day, month-end or another date.
- Normalize the names. Record issuer name, ticker, share class, country of incorporation or listing and portfolio weight. Keep separate share classes until you have checked whether they represent the same economic issuer.
- Count the positions. State whether the count includes cash, derivatives, short positions or multiple share classes. A “30 holdings” figure can be defined differently by different issuers.
- Sort by weight. Calculate the largest position, the cumulative top five and the cumulative top ten. Keep the date beside every result.
- Check overlap. Look for parent companies, depositary receipts, dual listings, subsidiaries and multiple share classes that make the economic exposure larger than the line-item count suggests.
- Group the issuers. Classify exposure by country and by business role, such as chip designers, foundries, memory producers, equipment makers and diversified technology companies. Use the fund’s own sector definitions where available.
As a dated reference, BlackRock iShares reported 30 SOXX holdings as of March 31, 2026. VanEck’s SMH prospectus described a 25-security index as of December 31, 2025. The cited XSD materials do not state a comparable current holdings count, so obtain its latest file rather than inferring one from the index name.
Measure concentration directly
Holdings count is a starting point, not a concentration measure. A portfolio of 30 positions can be more top-heavy than one with 25 if the first few weights are larger.
Top-one, top-five and top-ten weights
For each fund, record:
- Top one: the weight of the largest issuer. This shows single-name exposure.
- Top five: the sum of the five largest weights. This captures dependence on a small leadership group.
- Top ten: the sum of the ten largest weights. This shows how much of the portfolio is left for the long tail.
The cited documents do not provide current top-one, top-five or top-ten percentages for SOXX, SMH or XSD. Those values should be calculated from each fund’s latest dated holdings file, not filled with estimates from an older snapshot.
Herfindahl-style concentration
For a quantitative comparison, convert each weight to a decimal and calculate HHI = w1² + w2² + ... + wn². A lower result indicates a more even distribution. The reciprocal, 1/HHI, is an “effective number of equal-weight positions.” It is not a legal diversification test, but it lets you compare two portfolios with different holdings counts.
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For intuition, ten equal 10% positions produce an HHI of 0.10, while two equal 50% positions produce 0.50. Real funds will fall between those examples, and the calculation should use the actual weights on the same date.
Economic concentration beyond the ticker list
Review concentration in three additional dimensions:
- Business role: Several issuers may depend on the same semiconductor capital-spending cycle even if their product labels differ.
- Country and supply chain: A U.S.-listed portfolio can still have substantial foreign-issuer, manufacturing or customer exposure.
- Issuer families: Different share classes or related entities can create more exposure to one corporate group than the line count suggests.
Compare fees on an apples-to-apples basis
Start with the annual expense ratio or total annual operating expenses, then identify what the quoted number includes. A management fee is only one component of fund costs; total annual operating expenses are a broader figure. Do not rank a management fee from one fund against total operating expenses from another as though they were identical measures.
| Fund | Published cost figure | Source and date | Other documented cost information |
|---|---|---|---|
| SOXX | 0.33% management fee | BlackRock iShares, 2026 | Total annual operating expenses were not stated in the cited material; check the current prospectus. |
| SMH | 0.35% total annual operating expenses | VanEck, 2026 | Turnover and trading-spread figures were not stated in the cited material. |
| XSD | 0.35% total annual operating expenses | State Street, 2025 prospectus | Portfolio turnover was 28% for the fiscal year reported in that prospectus. |
As a simple scale check, 0.33% of a constant $10,000 balance is about $33 for one year, while 0.35% is about $35. That arithmetic is not a forecast: balances change, expenses accrue over time, and the quoted SOXX figure is a management fee rather than the full operating-expense figure.
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Turnover and transaction costs
Turnover measures how much of the portfolio was replaced during the reporting period. It can generate brokerage commissions, bid-ask spreads and market-impact costs that do not appear in the expense ratio. State Street’s XSD prospectus reported 28% portfolio turnover for the fiscal year covered by its 2025 prospectus and warns that a higher turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account.
Turnover is not automatically bad. An index that rebalances frequently may maintain its intended exposure, while a low-turnover index may drift as prices change. Treat the figure as evidence of potential friction and compare it with the fund’s tracking difference and the reason for the trades.
Trading frictions you pay outside the expense ratio
Check the bid-ask spread and the fund’s typical trading volume at the time you intend to trade. A wide spread can cost more than a small annual-fee difference, especially for a short holding period or a large order. Use limit orders when appropriate and avoid assuming that a fund’s average spread is constant through market stress.
Taxes and distributions
Turnover and index changes can create capital-gain distributions in a taxable account. The amount and timing are not guaranteed by the expense ratio. Review the fund’s distribution history and tax documents for the relevant year, and distinguish a tax cost caused by the fund from taxes caused by your own sale.
Understand diversification status and semiconductor-specific risks
“Diversified” can refer to a statutory classification, a portfolio characteristic or a marketing impression. Read the prospectus language and then inspect the actual weights.
Non-diversified classification
VanEck’s prospectus classifies SMH as a “non-diversified” fund under the Investment Company Act of 1940. That status permits a larger percentage of assets in fewer issuers than a diversified fund is generally allowed to hold. It does not predict a particular loss, but it means concentration limits should receive extra attention.
Sector cyclicality
Semiconductor demand can move in cycles tied to inventories, capital spending, consumer electronics, data-center investment and broader economic conditions. A sector ETF can therefore fall together even when its individual holdings operate in different niches.
Obsolescence and competition
XSD’s prospectus states that semiconductor-company prices can be vulnerable to rapid product cycles, technological obsolescence, regulation and domestic and international competition. A company can lose pricing power or market share quickly when a new process, architecture or substitute changes the market.
Geopolitical and foreign-issuer exposure
Semiconductor supply chains cross borders. Foreign-issuer risk, export controls, sanctions, tariffs, currency movements and restrictions on technology transfer can affect companies that are listed in the United States or included in a U.S.-focused index. Map issuer country and major manufacturing or customer exposure rather than relying on the fund’s listing venue.
Why an ETF can still be insufficiently diversified
An ETF spreads ownership across securities, but it may remain concentrated by industry, technology cycle, country or corporate group. Compare the semiconductor fund with the rest of your portfolio: owning several technology funds can reproduce the same large issuers and increase total exposure even when each ETF appears diversified on its own.
Compare SOXX, SMH and XSD using the same scorecard
Use one worksheet for every fund. The table below records only facts established in the cited documents and identifies the fields that still require a current holdings file.
| Evaluation axis | SOXX | SMH | XSD |
|---|---|---|---|
| Index or mandate | Index of U.S.-listed semiconductor-sector equities, per the iShares prospectus | MVIS US Listed Semiconductor 25 Index | S&P Semiconductor Select Industry Index |
| Documented position count | 30 holdings as of March 31, 2026 (BlackRock iShares) | 25-security index described as of December 31, 2025 (VanEck prospectus) | Not stated in the cited materials; obtain the latest holdings file |
| Replication note | Not stated in the cited materials | Not stated in the cited materials | May use representative sampling rather than owning every index constituent |
| Published fee figure | 0.33% management fee (BlackRock iShares, 2026) | 0.35% total annual operating expenses (VanEck, 2026) | 0.35% total annual operating expenses (State Street, 2025 prospectus) |
| Turnover figure | Not stated in the cited materials | Not stated in the cited materials | 28% for the fiscal year reported in the 2025 prospectus |
| Diversification classification | Not stated in the cited materials | Non-diversified under the Investment Company Act of 1940 | Not stated in the cited materials |
| Top-one, top-five and top-ten weights | Not stated; calculate from the latest dated file | Not stated; calculate from the latest dated file | Not stated; calculate from the latest dated file |
The table is a comparison framework, not a ranking. The missing concentration fields are the most important reason to retrieve current holdings before drawing a conclusion.
A repeatable evaluation workflow
- Fix the comparison date. Choose a common month-end or the latest available date for all funds. If one file is older, label the mismatch and avoid treating the weights as simultaneous.
- Read each prospectus objective and principal-strategy section. Copy the index name, investment percentage, eligible universe, weighting method and sampling language into your worksheet.
- Download and archive holdings. Keep the original file or a dated export so you can reproduce your calculations.
- Calculate concentration. Sort weights, sum the top five and top ten, calculate HHI if useful, and separately group by country, business role and issuer family.
- Reconcile the count. Explain differences between the stated holdings count and your spreadsheet total, including cash, derivatives, multiple share classes or sampling.
- Normalize costs. Put management fees, total annual operating expenses, waivers, turnover and any stated trading-cost information in separate columns. Never combine unlike measures into one “fee” number.
- Read the principal-risk disclosures. Mark cyclicality, obsolescence, competition, regulation, foreign-issuer and geopolitical risks that match your exposure.
- Test portfolio-level overlap. Add the fund’s largest issuers to your other ETFs and individual positions. Your household concentration matters more than the ETF’s label.
- Write a decision record. State the index, holdings date, top-five and top-ten weights, cost measure, turnover, diversification status and the risk you are accepting. Update the record when a new holdings file or prospectus changes a material field.
Common mistakes and how to correct them
Using a ticker as a proxy for a strategy
Two funds can both be called semiconductor ETFs while using different eligible universes, weighting caps and replication methods. Correction: record the index and rules before looking at performance.
Comparing stale holdings
A top position from one quarter cannot be compared with a current fee sheet or a different fund’s month-end file. Correction: put the “as of” date in every row and recalculate after material rebalances.
Assuming more holdings means less risk
Many small positions may contribute little to returns if the largest names dominate. Correction: use top-one, top-five, top-ten and HHI measures.
Treating all expense figures as equivalent
A management fee and total annual operating expenses do not describe exactly the same cost base. Correction: label each figure and retrieve the complete expense section from the current prospectus.
Ignoring turnover because the expense ratio is low
Trading spreads, brokerage costs and taxable distributions can reduce realized returns. Correction: inspect turnover, tracking difference and bid-ask spreads alongside the expense ratio.
Confusing U.S. listing with U.S. economic exposure
Listing location does not eliminate foreign-issuer, currency or geopolitical risk. Correction: map issuer country and supply-chain exposure from the holdings and prospectus.
Assuming an 80% policy guarantees diversification
SMH’s stated 80% policy concerns investment in index securities; it does not cap the weight of the largest names or make the sector broad. Correction: measure concentration in the actual portfolio.
How to interpret the result
A useful conclusion has three parts. First, describe the exposure precisely: the index, listing universe, weighting approach and holdings date. Second, quantify concentration and cost using comparable definitions. Third, state which risks remain even after diversification across tickers.
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If two funds have similar expense figures, the decision may turn on index construction, top-position limits, geographic mix, sampling, turnover and how their holdings overlap with your existing investments. If one appears cheaper, verify that you are not comparing a management fee with another fund’s all-in operating-expense figure, and check whether wider spreads or higher turnover offset the difference.
Keep the analysis date-specific. The SOXX count reported for March 31, 2026, the SMH index description dated December 31, 2025, and the XSD turnover reported in its 2025 prospectus are useful anchors, not permanent characteristics. A new prospectus or holdings file can change the answer to every concentration question.
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