Source钛媒体•Stalecollected in 3h
Guide to semiconductor index funds and investment strategies
Track the capital flow into the semiconductor industry, the backbone of all AI development.
30-Second TL;DR
What Changed
Detailed analysis of 11 different semiconductor index funds
Why It Matters
Understanding the composition of semiconductor indices is vital for AI practitioners to track the health of the hardware supply chain.
What To Do Next
Use these indices to identify which semiconductor manufacturers are receiving the most capital, signaling potential hardware supply trends.
Who should care:Developers & AI Engineers
Key Points
- •Detailed analysis of 11 different semiconductor index funds
- •Comparison of index styles, scale, and performance metrics
- •Strategic advice for avoiding homogenization traps in sector investing
Deep Insight
Background and context from public sources — not the original article. 14 sources cited.
Enhanced Key Takeaways
- •The artificial intelligence (AI) revolution is a primary driver for the semiconductor sector's growth, with chip stocks delivering over 20% annual returns in the past five years, making semiconductor ETFs a popular investment vehicle for broad exposure to this trend.
- •While some semiconductor ETFs are highly concentrated in mega-cap leaders like Nvidia and TSMC, newer strategies and funds are emerging to offer more balanced exposure across the semiconductor value chain, including memory, networking, custom chips, foundries, and equipment, to mitigate single-stock dominance and broaden participation.
- •Different weighting methodologies, such as market-cap weighted, equal-weighted, and factor-based approaches (e.g., profitability, valuation, momentum), significantly influence an ETF's risk profile and return characteristics, requiring investors to carefully consider the index tracked and its weighting scheme.
Competitor Analysis
Expense Ratio
- VanEck Semiconductor ETF (SMH)
- 0.35%
- iShares Semiconductor ETF (SOXX)
- 0.34% - 0.35%
- SPDR S&P Semiconductor ETF (XSD)
- 0.35%
- Invesco PHLX Semiconductor ETF (SOXQ)
- 0.19%
- Invesco Semiconductors ETF (PSI)
- 0.60%
Weighting Style
- VanEck Semiconductor ETF (SMH)
- Market-cap weighted, concentrated in top holdings
- iShares Semiconductor ETF (SOXX)
- Modified market-cap weighted, caps individual positions to reduce concentration
- SPDR S&P Semiconductor ETF (XSD)
- Equal-weighted, all holdings reset to roughly equal weights quarterly
- Invesco PHLX Semiconductor ETF (SOXQ)
- Tracks PHLX Semiconductor Index (modified market-cap weighted with caps)
- Invesco Semiconductors ETF (PSI)
- Dynamic factor-based (earnings/price momentum, value)
Number of Holdings
- VanEck Semiconductor ETF (SMH)
- ~25-26
- iShares Semiconductor ETF (SOXX)
- 30
- SPDR S&P Semiconductor ETF (XSD)
- 44
- Invesco PHLX Semiconductor ETF (SOXQ)
- 30
- Invesco Semiconductors ETF (PSI)
- 30
Top Holdings (as of early 2026)
- VanEck Semiconductor ETF (SMH)
- Nvidia, TSMC, Broadcom, ASML
- iShares Semiconductor ETF (SOXX)
- Micron Technology, AMD, Broadcom, Nvidia, Intel
- SPDR S&P Semiconductor ETF (XSD)
- Micron, Power Integrations, MACOM, AMD, ON Semi (equal-weighted)
- Invesco PHLX Semiconductor ETF (SOXQ)
- Broadcom, Nvidia, Micron Technology, Advanced Micro Devices
- Invesco Semiconductors ETF (PSI)
- KLA, Advanced Micro Devices, Broadcom, Texas Instruments
Focus
- VanEck Semiconductor ETF (SMH)
- Aggressive leaders, higher concentration, global exposure
- iShares Semiconductor ETF (SOXX)
- Core exposure, more balanced, U.S.-centric with some international
- SPDR S&P Semiconductor ETF (XSD)
- Diversification, broader participation beyond mega-caps, U.S. focus
- Invesco PHLX Semiconductor ETF (SOXQ)
- Cost-efficient core exposure, tracks PHLX Semiconductor Index
- Invesco Semiconductors ETF (PSI)
- Dynamic, momentum-factored, seeking future winners
| Feature/ETF | VanEck Semiconductor ETF (SMH) | iShares Semiconductor ETF (SOXX) | SPDR S&P Semiconductor ETF (XSD) | Invesco PHLX Semiconductor ETF (SOXQ) | Invesco Semiconductors ETF (PSI) |
|---|---|---|---|---|---|
| Expense Ratio | 0.35% | 0.34% - 0.35% | 0.35% | 0.19% | 0.60% |
| Weighting Style | Market-cap weighted, concentrated in top holdings | Modified market-cap weighted, caps individual positions to reduce concentration | Equal-weighted, all holdings reset to roughly equal weights quarterly | Tracks PHLX Semiconductor Index (modified market-cap weighted with caps) | Dynamic factor-based (earnings/price momentum, value) |
| Number of Holdings | ~25-26 | 30 | 44 | 30 | 30 |
| Top Holdings (as of early 2026) | Nvidia, TSMC, Broadcom, ASML | Micron Technology, AMD, Broadcom, Nvidia, Intel | Micron, Power Integrations, MACOM, AMD, ON Semi (equal-weighted) | Broadcom, Nvidia, Micron Technology, Advanced Micro Devices | KLA, Advanced Micro Devices, Broadcom, Texas Instruments |
| Focus | Aggressive leaders, higher concentration, global exposure | Core exposure, more balanced, U.S.-centric with some international | Diversification, broader participation beyond mega-caps, U.S. focus | Cost-efficient core exposure, tracks PHLX Semiconductor Index | Dynamic, momentum-factored, seeking future winners |
Technical Deep Dive
- Index Weighting Methodologies: Different approaches dictate how constituent stocks are weighted within a semiconductor index fund.
- Market-cap weighted: Companies with larger market capitalizations receive a greater proportion of the fund's assets. Examples include the VanEck Semiconductor ETF (SMH) which tracks the MVIS US Listed Semiconductor 25 Index.
- Modified market-cap weighted: Similar to market-cap weighting but with caps on individual stock percentages to prevent excessive concentration. The iShares Semiconductor ETF (SOXX) tracks the NYSE Semiconductor Index, which employs this method, capping individual position sizes and rebalancing quarterly.
- Equal-weighted: Each stock in the index is allocated a roughly equal percentage of the total portfolio, regardless of its market capitalization. The SPDR S&P Semiconductor ETF (XSD) is an example, with holdings reset to equal weights quarterly.
- Factor-based: Stocks are weighted based on specific financial or technical factors such as earnings momentum, price momentum, value, gross income, or return on assets. The Invesco Semiconductors ETF (PSI) tracks the Dynamic Semiconductor Intellidex Index, which uses such factors.
- Index Rebalancing and Reconstitution (e.g., PHLX Semiconductor Sector Index - SOX):
- Constituent Selection: The PHLX Semiconductor Sector Index (SOX) is designed to measure the performance of the 30 largest U.S.-listed semiconductor companies. Eligibility criteria include listing on major U.S. exchanges, classification under the Semiconductors Subsector (ICB code 9576), a minimum market capitalization of $100 million, and specific trading volume and seasoning requirements.
- Reconstitution Schedule: Constituents are typically selected once annually.
- Weight Adjustments: The index employs a two-stage weight adjustment scheme. Initial weights are determined by market capitalization. These are then adjusted to meet specific constraints. As of April 2024, the individual weights of the top three constituents by market capitalization are capped at 12%, 10%, and 8% respectively, while other constituents are capped at 4%. Any excess weight is proportionally redistributed to lower-weighted constituents.
- Rebalancing Frequency: Weights are adjusted quarterly, typically after the close of trading on the third Friday in March, June, September, and December.
Future ImplicationsAI analysis grounded in cited sources
The semiconductor industry will continue to be a critical driver of global technological advancement, particularly in AI.
The increasing demand for specialized chips for AI compute, data centers, and other advanced technologies ensures sustained growth and innovation in the sector.
Investment strategies in semiconductor index funds will increasingly focus on diversification beyond a few mega-cap leaders.
As the 'AI trade' broadens to include various segments of the semiconductor value chain (memory, networking, equipment), investors will seek funds that offer exposure to a wider array of companies to capture diverse growth opportunities and manage concentration risk.
Geopolitical factors and supply chain resilience will play a more significant role in shaping semiconductor investment landscapes.
Export controls, tariffs, and efforts toward supply chain reshoring introduce policy risks and can quickly reshape the global semiconductor value chain, impacting company performance and investment flows.
Timeline
1947
Invention of the transistor, replacing vacuum tubes and enabling smaller computers.
1959
Birth of the silicon chip, leading to the growth of Silicon Valley.
1993-12-01
PHLX Semiconductor Sector Index (SOX) launched with a base value of 100.00.
2001-07-10
iShares Semiconductor ETF (SOXX) launched.
2011-12
VanEck Semiconductor ETF (SMH) launched.
2024-04-22
Nasdaq implements updated methodology for the PHLX Semiconductor Index (SOX), adjusting weight caps for top constituents.
- 1947Invention of the transistor, replacing vacuum tubes and enabling smaller computers.
- 1959Birth of the silicon chip, leading to the growth of Silicon Valley.
- 1993-12-01PHLX Semiconductor Sector Index (SOX) launched with a base value of 100.00.
- 2001-07-10iShares Semiconductor ETF (SOXX) launched.
- 2011-12VanEck Semiconductor ETF (SMH) launched.
- 2024-04-22Nasdaq implements updated methodology for the PHLX Semiconductor Index (SOX), adjusting weight caps for top constituents.
Sources (14)
Factual claims are grounded in the sources below. Forward-looking analysis is AI-generated interpretation.
1marketwise.comvertexaisearch.cloud.google.com2ultimamarkets.comvertexaisearch.cloud.google.com3fool.comvertexaisearch.cloud.google.com4etftrends.comvertexaisearch.cloud.google.com5etf.comvertexaisearch.cloud.google.com6ishares.comvertexaisearch.cloud.google.com7youtube.comvertexaisearch.cloud.google.com8ebc.comvertexaisearch.cloud.google.com9nasdaq.comvertexaisearch.cloud.google.com10fool.comvertexaisearch.cloud.google.com11vaneck.comvertexaisearch.cloud.google.com12nasdaqomx.comvertexaisearch.cloud.google.com13nasdaqomx.comvertexaisearch.cloud.google.com14youtube.comvertexaisearch.cloud.google.com
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