{
  "kind": "fact",
  "studySlug": "citation-decay",
  "slug": "nearly-half-of-brands-halve-within-a-week",
  "title": "Nearly half of brands halve within a week",
  "description": "Fast decay is common, not exceptional.",
  "lastUpdated": "2026-03-30",
  "lastTested": "2026-03-30",
  "sourceStudyUrl": "/trakkr-research/citation-decay",
  "sourceStudyTitle": "The Half-Life of AI Citations",
  "claimIds": [
    "citation-decay:halved-7d"
  ],
  "relatedSlugs": [
    "answer:how-fast-can-ai-visibility-drop-after-a-peak",
    "answer:is-ai-visibility-more-volatile-than-traditional-search-rankings",
    "tracker:citation-persistence-tracker"
  ],
  "methodologySummary": "Built from 857,138 reports, 108,650 citations, 10,991 brands, and 8 tracked models across a 10-month observation window.",
  "limitations": [
    "Decay describes observed persistence, not the full causal mechanism behind why a citation disappears.",
    "Brand- and domain-level averages can hide very different retention patterns by query class or model.",
    "Some of the stickiest or most volatile domains come from niche query pockets and should be read as examples, not universal leaders."
  ],
  "keywords": [
    "citation decay",
    "AI half life",
    "AI citation persistence",
    "AI visibility churn"
  ],
  "schemaHints": {
    "pageType": "Article",
    "includeDataset": true
  },
  "claim": "47.1% of brands in the study halve within 7 days of peak presence.",
  "supportingMetrics": [
    {
      "label": "Brands halved within 7 days",
      "value": "47.1%",
      "detail": "A large share of brands decay quickly."
    }
  ],
  "whyItMatters": "Teams need close-to-real-time monitoring to catch and respond to rapid losses.",
  "citationBlock": {
    "quote": "47.1% of brands in the study halve within 7 days of peak presence.",
    "attribution": "The Half-Life of AI Citations - Trakkr Research",
    "url": "https://trakkr.ai/trakkr-research/citation-decay/facts/nearly-half-of-brands-halve-within-a-week"
  }
}