Nasdaq 100 — Under Its September Low; Health Care Leads, the AI Builders Retest Theirs

Two stories in one week. The first is relative strength

Two stories in one week. The first is relative strength — health care rose 3.1 percent and topped the eleven sectors, the index of companies that use AI sits 1.4 percent under a new high, and the four large builders the books hold (Nvidia, TSMC, SK Hynix, Advantest) held up better than the rest. The second is a bottom — the AI build-out index came back …