#index concentration

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A set of balance scales on a bright desk between two stacks of printed reports, a weight caught being lowered onto one side, the scale not yet settled

Is the Chip Rally a Bubble? The Numbers on Both Sides, Weighed Fairly

Semiconductor stocks are more concentrated in the S&P 500 than tech was at the dot-com peak, and also backed by real demand this cohort has documented elsewhere. This briefing weighs both without picking a side.

By Brecht Corbeel · August 10, 2026 · 4 min read

A large printed pie chart of index sector weights on a bright wall, one wedge caught being redrawn larger by a hand-free drafting tool, the new boundary line not yet complete

AI Hardware & Semiconductors

18% of the S&P 500 Is Now One Industry

Semiconductors have grown from 2% to 18% of S&P 500 weight — more than double the dot-com peak. A portfolio that never touches a chip stock by name is still more exposed to this one industry than most investors realize.

By Brecht Corbeel · August 10, 2026 · 4 min read

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