Last updated: August 2026
This article is for informational purposes only and is not investment advice. See our full Disclaimer for details.
Our Best Sector ETFs guide covers the eleven broad GICS sectors, but semiconductors deserve their own dedicated look — they’re technically part of the technology sector, but the AI buildout has turned chip-focused funds into some of the most closely watched, and most volatile, ETFs on the market. This guide compares the major semiconductor ETFs, explains a construction difference between the two largest funds that most comparisons gloss over, and covers the risks specific to this concentrated corner of the market.
New to sector investing? Our Best Sector ETFs guide covers the broader framework first.
Why Semiconductors Get Their Own Category
Semiconductors sit at the center of the AI infrastructure buildout — the chips that power data centers, AI training and inference, and the specialized hardware hyperscalers have been investing in at an accelerating pace. That’s made semiconductor-focused ETFs some of the strongest-performing, and most closely tracked, funds in the market over the past several years, but it’s also concentrated real risk: chip demand is historically cyclical, a small number of companies dominate critical parts of the supply chain, and geopolitical tension around Taiwan specifically touches a meaningful share of global chip production.
Quick Comparison Table
| ETF | Approach | Expense Ratio | Approx. Holdings |
|---|---|---|---|
| SMH | Concentrated, market-cap-weighted mega-cap leaders | 0.35% | ~25-26 |
| SOXX | Broader, capped-weight U.S. semiconductor exposure | 0.34% | ~30 |
| SOXQ | Lowest-cost alternative, similar to SOXX | 0.19% | ~30 |
| XSD | Equal-weighted, reduced mega-cap concentration | 0.35% | ~48 |
Figures are approximate and change as funds rebalance. Always confirm current expense ratios, holdings, and concentration on each issuer’s official fund page before investing.
1. VanEck Semiconductor ETF (SMH) — The Concentrated Leader
Tracks: MVIS US Listed Semiconductor 25 Index
SMH is the largest semiconductor ETF by assets, and its defining feature is concentration: a relatively small basket of roughly 25-26 holdings, market-cap-weighted with a 20% cap on any single position at each quarterly rebalance. In practice, that structure lets the largest AI-linked chip leaders — historically including NVIDIA, Taiwan Semiconductor Manufacturing (TSMC), and Broadcom — drive a substantial share of the fund’s performance, with NVIDIA alone commonly representing somewhere in the mid-teens to low-20% range of total assets depending on the rebalance date.
Worth knowing: SMH includes meaningful exposure to non-U.S.-headquartered names central to the global chip supply chain, including Taiwan Semiconductor and, depending on the period, Dutch lithography equipment maker ASML — giving it broader exposure to the international manufacturing and equipment side of the chain than a purely U.S.-listed fund would.
Best for: Investors who specifically want concentrated exposure to the largest, most capacity-constrained AI chip leaders, and who are comfortable with the added volatility that concentration brings.
2. iShares Semiconductor ETF (SOXX) — The More Balanced Alternative
Tracks: A semiconductor-sector index of roughly 30 large, liquid U.S.-listed companies
SOXX takes a meaningfully different construction approach from SMH, even though the two funds share most of their largest individual holdings. SOXX applies tighter concentration limits — commonly cited as an 8% cap on each of its top five holdings and a 4% cap on the remainder at each quarterly rebalance — resulting in a portfolio where no single company dominates the way NVIDIA can within SMH. SOXX also splits its exposure between semiconductor companies and semiconductor equipment makers, giving it dual exposure to both chip designers and the specialized machinery required to manufacture them.
Worth knowing: Because of its lower concentration, SOXX has, in some periods, modestly lagged SMH’s returns during stretches when the very largest AI names led the market most sharply — the same concentration trade-off covered in our Best Growth ETFs guide’s discussion of QQQ. SOXX is also one of the longest-established funds in this category, having launched in 2001, giving it a considerably longer track record than many newer, more thematically narrow AI funds.
Best for: Investors who want broad semiconductor sector exposure with less single-company concentration risk than SMH, while still capturing the sector’s overall AI-driven growth.
3. Invesco PHLX Semiconductor ETF (SOXQ) — The Low-Cost Option
Tracks: PHLX Semiconductor Sector Index
SOXQ holds a portfolio substantially similar to SOXX, tracking a comparable semiconductor index, but at roughly half the expense ratio — among the cheapest ways to access broad semiconductor exposure. Its asset base is considerably smaller than SMH or SOXX, reflecting its more recent rise as a competitive, cost-focused alternative rather than an established original.
Worth knowing: Because SOXQ tracks a different underlying index than SMH or SOXX, it’s sometimes mentioned as a tax-loss harvesting swap candidate for investors holding one of the larger funds. As covered in our What Is Tax-Loss Harvesting guide, however, the IRS has never precisely defined which funds count as “substantially identical” for wash-sale purposes — given how heavily these three funds’ holdings overlap, this is a genuine gray area worth discussing with a tax professional rather than assuming a different index name alone guarantees safety from a wash-sale disallowance.
Best for: Cost-conscious, long-term investors who want SOXX-like broad semiconductor exposure at a meaningfully lower ongoing fee.
4. SPDR S&P Semiconductor ETF (XSD) — The Equal-Weight Option
Tracks: S&P Semiconductor Select Industry Index
XSD takes a structurally different approach from the other three funds on this list: rather than weighting by market capitalization, it equally weights each of its roughly 48 holdings at every quarterly rebalance, giving a small or mid-cap semiconductor company the same influence on the fund as an industry giant like NVIDIA.
Worth knowing: This equal-weight structure cuts both ways. During strong bull markets led by the largest mega-cap chip names, XSD’s approach of systematically trimming winners and adding to laggards at each rebalance can dampen returns relative to SMH or SOXX. Later in a market cycle, or during periods when smaller semiconductor companies catch up to mega-cap performance, that same structure can reduce the portfolio’s sensitivity to a sharp pullback in a handful of dominant names.
Best for: Investors who specifically want to reduce concentration risk in the largest AI chip leaders and are comfortable with a different, more diversified risk profile than the market-cap-weighted alternatives.
A Higher-Risk Category Worth Knowing About: Actively Managed AI Funds
Beyond the semiconductor-focused funds above, a newer category of actively managed, AI-themed ETFs has emerged, generally charging meaningfully higher expense ratios (often around 0.75%) in exchange for the flexibility to move beyond pure chip stocks into AI-adjacent software, infrastructure, or newly public companies not yet included in a passive semiconductor index. These funds can deviate significantly from a passive benchmark, for better or worse, and typically carry considerably shorter track records and less predictable risk profiles than the more established, passively indexed semiconductor funds covered above — closer in spirit to the actively managed, higher-risk pick structure covered in our Best Growth ETFs guide’s discussion of ARKK.
Risks Specific to This Category
Extreme concentration. Even the more diversified funds on this list hold a relatively small number of companies compared to a broad sector fund like XLK, and several individual holdings can represent double-digit percentages of assets — a downturn in one or two companies can meaningfully affect the entire fund.
Geopolitical risk tied to Taiwan. A significant share of the world’s most advanced semiconductor manufacturing is concentrated in Taiwan, primarily through Taiwan Semiconductor Manufacturing. Geopolitical tension in the Taiwan Strait represents a systemic risk to the sector that doesn’t have a close parallel in most other sector-based ETFs covered on this site.
U.S.-China trade and export policy. Export controls on advanced chips and semiconductor manufacturing equipment have been an ongoing source of policy risk for this sector, with the potential to affect specific holdings significantly depending on how restrictions evolve.
Cyclicality. Semiconductor demand has historically moved through pronounced boom-and-bust cycles, driven by shifts in PC and smartphone demand, data center capital expenditure, and automotive production — a pattern that predates the current AI-driven cycle and is a structural feature of the industry, not a new risk.
Customer concentration. A substantial share of recent semiconductor demand has been driven by a relatively small number of large technology companies’ data center and AI infrastructure spending — meaning a slowdown in capital expenditure from a handful of major customers could disproportionately affect the sector.
How This Fits Within a Broader Portfolio
Consistent with the framing throughout our Best Sector ETFs and Best Growth ETFs guides, semiconductor-focused funds are generally discussed as a satellite allocation layered on top of a diversified core — such as VOO or VTI — rather than a core holding on their own. Investors already holding a broad growth fund like QQQ should also note that semiconductor and AI-related companies already make up a meaningful share of that fund’s weighting, meaning a dedicated semiconductor ETF adds further concentration on top of exposure many broad growth and technology investors already have, rather than introducing an entirely separate risk.
Frequently Asked Questions
What’s the real difference between SMH and SOXX if they hold mostly the same companies? The weighting methodology. SMH allows its largest holdings to grow to a higher concentration (up to a 20% cap), while SOXX applies tighter caps (8% on its top five, 4% on the rest), resulting in a less top-heavy portfolio despite substantial overlap in which companies both funds hold.
Is SOXQ just a cheaper version of SOXX? It’s similar in construction and tracks a comparable index, though not identical — SOXQ tracks the PHLX Semiconductor Sector Index specifically. For most long-term investors, the primary practical difference is SOXQ’s considerably lower expense ratio.
Why is XSD’s performance sometimes so different from SMH or SOXX? Because XSD equally weights its holdings rather than weighting by market cap, it has much less exposure to the very largest chip companies relative to smaller ones — meaning its performance can diverge meaningfully from the more concentrated funds, in either direction, depending on whether mega-cap or smaller semiconductor stocks are leading at a given time.
Are semiconductor ETFs riskier than a broad technology sector fund like XLK? Generally yes, given the narrower, more concentrated nature of semiconductor-specific funds compared to a broader technology sector fund that spans software, hardware, and other technology sub-industries beyond chips specifically.
Should I own a semiconductor ETF if I already hold QQQ or a growth ETF? Worth considering carefully — semiconductor and AI-related companies already carry meaningful weight within broad growth and technology-heavy funds like QQQ, covered in our Best Growth ETFs guide, so adding a dedicated semiconductor fund on top increases concentration in that specific theme rather than adding a genuinely separate exposure.
What’s the biggest risk unique to this sector compared to other tech sub-sectors? The geographic concentration of advanced chip manufacturing in Taiwan is frequently cited as the most distinctive systemic risk, given how much of the global semiconductor supply chain depends on a single region’s continued stability and production capacity.
This article reflects publicly available fund data as of the “last updated” date above and is provided for informational purposes only — it is not a recommendation to buy or sell any security. Expense ratios, holdings, concentration, and performance figures change frequently in this sector and should be verified directly on each issuer’s official fund page before making an investment decision. Read our full Disclaimer and Privacy Policy for more information.