SMH vs SOXQ vs SOXX: Same Industry, Three Semi Indexes

Overview

These three ETFs track different U.S. semiconductor indexes, each with distinct composition rules and fee structures. All three are large-cap semiconductor exposure plays, but they differ materially in size, cost, turnover, and the breadth of companies included.

How they differ

The biggest difference is index construction: SMH holds exactly 25 companies, while SOXQ and SOXX track broader sector indexes that may include dozens more names. This means SMH carries more concentration risk within the semiconductor space, while SOXQ and SOXX offer wider diversification across the sector.

On fees and asset base, SOXQ is the cheapest at 0.19%, but also the smallest with $3.16B in assets—roughly $3.16B-to-$72.8B compared to SMH's scale. SMH charges 0.35% and commands the largest asset base at $72.8B. SOXX splits the difference: $45.9B in AUM and 0.33% in expenses.

On yield, all three are minimal payers. Beta readings (2.0, 2.23, 2.28) indicate all three amplify broad market swings; SOXX's slightly higher beta suggests marginally greater volatility.

Who each is best for

• SMH: Fits investors seeking the tightest, most concentrated semiconductor play with the lowest fees among large semiconductor baskets and the deepest liquidity.

• SOXQ: Fits investors prioritizing the lowest expense ratio and comfortable with a smaller fund that tracks the traditional PHLX Semiconductor Index with quarterly distributions.

• SOXX: Fits investors wanting broad semiconductor exposure with a longer fund track record and the middle ground between SMH's concentration and SOXQ's smaller size.

Key risks to know

• Index composition and concentration: SMH's 25-holding structure concentrates its exposure far more than broader semiconductor indexes; a sharp correction in the largest holdings will have outsized impact on fund performance. Verify whether the index methodology and holdings overlap with your other technology positions.

• Sector cyclicality and valuation: Semiconductor stocks are highly cyclical and sensitive to supply-chain disruption, chip demand cycles, and capital spending trends. A prolonged industry downturn could pressure all three simultaneously.

• Beta and drawdown magnitude: With betas of 2.0 to 2.28, these funds are expected to fall roughly twice as fast as the broader market in a correction—a meaningful source of volatility for buy-and-hold investors.

Bottom line

If you want the broadest, most liquid semiconductor ETF with a long track record, SOXX (founded 07/10/2001) stands out. If lowest fees are your priority and you're comfortable with a younger fund, SOXQ offers a slight cost advantage. If you value tight concentration and maximum scale, SMH's 25-stock approach and $72.8B in assets appeal—but that concentration cuts both ways. All three will move sharply with semiconductor sector cycles, regardless of construction; past performance does not predict future results.