Qualcomm Falls Over 9% Premarket on Weak Profit Guidance; Arm Down Nearly 4%

The signal here is that beats on reported results are no longer enough to hold valuations in semis — guidance, not the quarter, is setting the tone, and the handset-exposed names are where that skepticism concentrates. The read-through is broad rather than company-specific: Arm's slide despite its own beat, and the memory names moving in sympathy, point to a sector trading on forward expectations rather than trailing numbers. Whether this guidance-driven de-rating stays confined to handset-linked chips or spreads further into the memory complex is the open question worth watching.