{
  "url": "https://struct.news/briefs/forty-very-different-stocks-suddenly-moved-like-cousins-at-a-family-reunion",
  "title": "Forty mostly unrelated names started trading like one instrument",
  "summary": "Residual correlation among a 40-stock cross-sector group leapt from 0.07 to 0.80, a 3.7σ move, and 38 of the 40 were active today.",
  "published_at": "2026-07-31T16:21:06.927837+00:00",
  "publisher": "Struct",
  "usage": "Figures are as reported by the company. Quote with attribution to the source filing.",
  "company": {
    "name": null,
    "ticker": null,
    "cik": null,
    "sector": null,
    "industry": null
  },
  "source_filing": null,
  "comparison_filing": null,
  "reported_figures": [
    {
      "group": "Co-movement snapshot",
      "label": "Active today",
      "value": 38,
      "display": "38/40",
      "unit": "number",
      "period": null,
      "detail": "Group members above Jodie's activity threshold",
      "source": {
        "kind": "jodie_evidence",
        "label": "Broad-market moves removed",
        "as_of": "2026-07-30"
      }
    },
    {
      "group": "Co-movement snapshot",
      "label": "Recent correlation",
      "value": 0.8033,
      "display": "0.80",
      "unit": "number",
      "period": null,
      "detail": null,
      "source": {
        "kind": "jodie_evidence",
        "label": "Broad-market moves removed",
        "as_of": "2026-07-30"
      }
    },
    {
      "group": "Co-movement snapshot",
      "label": "Usual correlation",
      "value": 0.0741,
      "display": "0.07",
      "unit": "number",
      "period": null,
      "detail": null,
      "source": {
        "kind": "jodie_evidence",
        "label": "Broad-market moves removed",
        "as_of": "2026-07-30"
      }
    },
    {
      "group": "Co-movement snapshot",
      "label": "Above normal",
      "value": 3.66,
      "display": "3.7σ",
      "unit": "sigma",
      "period": null,
      "detail": null,
      "source": {
        "kind": "jodie_evidence",
        "label": "Broad-market moves removed",
        "as_of": "2026-07-30"
      }
    }
  ],
  "watch_next": [
    {
      "type": "co_movement_persistence",
      "statement": "Residual average pairwise correlation at 0.80, 3.7σ above the group's baseline.",
      "importance": "medium",
      "evidence": "CO-MOVEMENT (residualized - broad-market moves already stripped out): recent average pairwise correlation among the group: 0.80 their longer-run BASELINE correlation: 0.07 (i.e. normally they barely track each other) that gap is 3.7 standard deviations above normal (z-score)",
      "source_date": "2026-07-30"
    }
  ],
  "related_tickers": [
    "BGSI",
    "BR",
    "BWIN",
    "CFR",
    "EFX",
    "ITW",
    "MMS",
    "RELX",
    "TTEK",
    "UNF",
    "VLTO",
    "VRSK"
  ],
  "disclaimer": "Descriptive reporting of filed results. Not investment advice, and contains no forecast or recommendation."
}