What happened
An AI-led rollover: the Nasdaq-100 dropped 2.6% intraday — its fifth straight losing session and worst week since March — while the S&P 500 actually rose 0.75%. The rotation had turned into divergence.
The drivers were all AI-narrative: OpenAI's IPO delayed to 2027, fresh scrutiny of the $725 billion AI capital-spending pipeline, memory-chip price hikes hitting Apple and Microsoft's margins, and SpaceX trading 24–30% below its IPO price. The monthly momentum gauge fell decisively below the 77.88 threshold — the three-peak caution pattern re-armed, no longer on a knife-edge.
The dashboard
Below the 60% line — the index is being carried by a minority of its stocks.
4.28 points below the 77.88 threshold — the three-peak caution pattern remains in force.
Mid-range — momentum neither stretched nor washed out.
Positive — more stocks advancing than declining on balance.
The trend at a glance
Reference levels on this date
| Reference | Level | Plain meaning |
|---|---|---|
| NDX · 200-day average | 26,006 | The long-term trend line. |
| NDX · deep-value band (QEMA5) | 25,317 | The quarterly EMA-5 — the zone that has caught nearly every major dip this cycle. |
| SPX · 200-day average | 6,929 | The long-term trend line. |
| SPX · deep-value band (QEMA5) | 6,748 | The equivalent deep-support reference for the broad index. |
Framework read
For six weeks the divergence was about breadth. This was the first week the AI story itself supplied the catalyst.