Why Taiwan Semiconductor (TSM) fell 1.72%
Taiwan Semiconductor (TSM) fell 1.72% on October 29, 2026 — Lighter AI capex fears weigh on chip foundry demand.
What happened
Taiwan Semiconductor fell about 1.7% as the AI Compute group sold off after Alphabet's earnings revived fears about AI spending. The move was group-wide, with TSMC trading in line with the rest of the chain.
Why it moved
Alphabet's lighter capex read-through questions how much AI infrastructure customers will order, which hits the foundry that makes their chips.
Why it matters
TSMC is the manufacturing backbone of the AI Compute theme, where hyperscaler and neocloud GPU buildouts drove demand for months. A stall in that buildout threatens the foundry volume that supports its growth.
What would break the thesis
If Amazon and other hyperscalers reaffirm or raise their capex plans, the spending fear fades and TSMC should recover. Continued capex cuts from major customers would confirm a lasting slowdown in foundry demand.