The iShares Semiconductor ETF (NASDAQ:SOXX) has ridden the AI chip boom to a 93.3% year-to-date gain through July 6, 2026, nearly doubling investor capital in roughly six months. Over the trailing year, the fund is up an even more striking 140.08%. What may surprise retirement-focused investors combing through the roster: one of the most-discussed AI hardware names of the cycle, Super Micro Computer (NASDAQ:SMCI | SMCI Price Prediction), is not in the fund.
What SOXX Actually Owns
SOXX is issued by BlackRock’s iShares family and seeks to track the investment results of an index composed of U.S.-listed equities in the semiconductor sector. Its benchmark is the NYSE Semiconductor Index, and the fund has been trading since its inception on July 10, 2001. Costs are low: the expense ratio is 0.34%, or 34 basis points, based on the March 9, 2026 fact sheet.
The prospectus data available for this article does not include a current top-holdings breakdown or total net assets, so we will not speculate on individual position weights. What is documented is the mandate: SOXX is a pure-play semiconductor index fund, meaning the companies inside make or design chips rather than assemble finished systems.
Why the Fund Has Nearly Doubled
The engine behind SOXX’s run is straightforward. Demand for AI accelerators, high-bandwidth memory, and advanced packaging has swept across every layer of the chip supply chain, from logic designers to memory suppliers to the equipment vendors that outfit fabs. Chips are broadly grouped into logic chips, memory chips, and discrete, analogue and other chips, and hyperscaler spending has lifted all three categories.
Over the past month alone, SOXX has added 7.78%. The five-year return sits at 309.9%, and the ten-year figure is 1,925.85%. It has not been a straight line, though: the ETF is down 5.35% over the trailing week ending July 6, 2026, and slipped again in the most recent session with a 4.83% single-day decline.
Why Super Micro Isn’t in the Fund
Here is the counterintuitive part. Super Micro is a marquee AI beneficiary. It designs and manufactures server systems, AI platforms, storage solutions, IoT devices, switch systems, software, and support services. In other words, Supermicro builds the boxes that house Nvidia’s GPUs and other chips; it does not fabricate the silicon itself.
That distinction matters for a rules-based index. SOXX targets semiconductor makers and designers. Supermicro is a systems integrator and hardware assembler, closer to a computer hardware classification than a chipmaker. Because of that structural line, Supermicro sits outside the NYSE Semiconductor Index that SOXX mirrors. For a retirement investor, the plain-English version is this: SOXX owns the companies that make the chips, while Supermicro makes the servers those chips go into.
How the Exclusion Has Played Out
Not owning Super Micro has been a tailwind for the fund. Supermicro shares are down 7.11% year-to-date and off 44.01% over the past year, closing at $26.30 on July 6, 2026. The stock is also nursing a 34.7% drop over the last month.
Fundamentals have been noisy. Q3 FY26 revenue came in at $10.24 billion, growing 122.68% year over year but missing the $12.45 billion consensus by 17.75%, while non-GAAP EPS of $0.84 beat the $0.6245 estimate. Results remain preliminary and unaudited, with the Board conducting an independent review tied to export-control matters. CEO Charles Liang said, “Supermicro’s transformation into a total datacenter infrastructure provider is accelerating.” Diversified chip exposure via SOXX has sidestepped that single-name volatility entirely.
The Takeaway
SOXX gives investors a passive, low-cost slice of the chip industry powering the AI buildout. That basket excludes hardware integrators like Super Micro by design, which happened to work in the fund’s favor over the past year. It also concentrates risk in one cyclical sector, and semiconductor drawdowns can be sharp, as the recent weekly slide suggests. Past performance doesn’t guarantee future results, and none of this is investment advice. Whether SOXX fits a portfolio depends on how much sector concentration and cyclicality a given retirement plan can tolerate.
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