US AI Winners Index Falls 5.87% Friday, Down 15.05% in October

The breadth of Friday's selloff is the signal here: the decliners span memory, optics, connectivity, accelerators, servers and neoclouds, so this reads as a repricing of the whole AI hardware supply chain rather than a single-name problem. The steady slide from October 6 to 16 followed by a sharp Friday drop suggests two distinct phases — a grind lower and then a capitulation-style session — which matters for anyone tracking whether this is rotation or de-risking. Whether the selling broadens beyond hardware into other AI-linked segments is the open question.