SMH vs SOXQ: Same Industry, Different Semi Indexes

Overview

SMH and SOXQ are both semiconductor-focused equity ETFs tracking different US-listed semiconductor indexes, but they differ materially in index construction, fund size, and fee structure. SMH follows the MVIS US Listed Semiconductor 25 Index (25 holdings), while SOXQ tracks the PHLX SOX Semiconductor Sector Index (a broader basket). The choice between them hinges on concentration tolerance, cost, and index philosophy rather than strategy drift.

How they differ

The biggest difference is index scope: SMH holds 25 stocks, while SOXQ tracks a broader semiconductor sector index. This makes SMH more concentrated—likely to have heavier weights in mega-cap chip designers and manufacturers—while SOXQ casts a wider net across the sector. Second, SOXQ charges 0.19% annually versus SMH's 0.35%, a 16-basis-point edge that compounds over time on a $71.5B fund versus SOXQ's $2.86B. Third, SOXQ offers quarterly distributions at a 0.32% rate versus SMH's annual 0.19%, though the income difference is modest—both funds emphasize capital appreciation over yield. Beta is similar (SMH at 2.05, SOXQ at 2.27), confirming both carry pronounced semiconductor sector volatility.

Who each is best for

SMH: Fits investors seeking a long-established, liquid semiconductor core position with tight tracking to a curated 25-stock index; the $71.5B in assets ensures deep trading liquidity and tight bid-ask spreads.

SOXQ: Fits investors who value lower fees and broader sector exposure, or who prefer quarterly income distribution timing; the PHLX index provides wider diversification across the semiconductor value chain at a cost disadvantage only if held for many years.

Key risks to know

• Concentration risk in mega-cap foundries and chip designers. Both funds will reflect heavy exposure to TSMC, Samsung, Intel, and NVIDIA given their market dominance; holdings overlap is likely material, creating correlated downside if design cycles or geopolitical semiconductor supply concerns pressure these names simultaneously.

• Sector cyclicality and inventory risk. Semiconductor demand is historically volatile, tied to PC, smartphone, and data-center cycles; either fund will experience sharp drawdowns during industry downturns or inventory corrections, with beta above 2.0 amplifying losses.

• Expense ratio drag on SOXQ's smaller asset base. Although SOXQ's 0.19% ratio is lower in absolute terms, its $2.86B AUM (roughly 4% of SMH's size) may face wider trading spreads and liquidity constraints during stress, potentially offsetting the fee advantage.

• Index construction differences may diverge performance. MVIS's 25-stock methodology versus the PHLX's broader basket means sector rotations (memory chips vs. logic, foundry services vs. design) could cause meaningful tracking splits; neither is "right," but they will not move in lockstep.

Bottom line

If you prioritize low fees and breadth, SOXQ's 0.19% expense ratio and wider index appeal. If you value liquidity, scale, and a focused 25-stock approach, SMH's $71.5B in assets and longer track record stand out. Both carry pronounced sector and cyclical risk; past performance doesn't predict future results.