#4 · Top-10 Concentration
Latest
39.43%
Min
29.71%
Max
42.28%
Data points
276
Creator threshold
Creator: red-triggered; the top-10 weight has reached a distorted ~39.3%.
Historical state distribution2025-05-29 → 2026-07-03
| Triggered | 95 | 34.4% |
| Warning | 98 | 35.5% |
| Not triggered | 83 | 30.1% |
Combined market-cap weight of the ten largest S&P 500 companies. When an index rally is carried by a handful of mega-caps while breadth deteriorates, the structure is fragile: if the leaders stall, the index cascades.
FMP · market-cap batch ÷ S&P 500 total