#4 · Top-10 Concentration
Latest
41.93%
Min
30.25%
Max
42.52%
Data points
332
Creator threshold
Creator: red-triggered; the top-10 weight has reached a distorted ~39.3%.
Historical state distribution2025-06-13 → 2026-09-13
| Triggered | 162 | 48.8% |
| Warning | 98 | 29.5% |
| Not triggered | 72 | 21.7% |
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.
Terminal data · market-cap batch ÷ S&P 500 total