{
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  "dek": "Wall Street ended down on Monday, weighed down by losses in Nvidia and other chipmakers after top executives in US artificial intelligence companies raised safety concerns and called for a slowdown in the development of AI. Investors were also jittery after the benchmark 10-year US Treasury yield briefly surpassed 5 pe",
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      "source_name": "Radio Television Hong Kong",
      "title": "US stocks fall on AI fears as bond yields rise",
      "url": "https://news.rthk.hk/rthk/en/component/k2/1870007-20260915.htm",
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  "lead_reason": "Current single-source metadata is retained but not promoted as a lead.",
  "limitations": [
    "Palimpsest retained only feed title, canonical link, time, and a bounded plain-text excerpt; it did not fetch the article body.",
    "The evidence-strength label describes source structure, not truth, intent, impact, or causation.",
    "Declared instrument links are topical pointers until a separate scan or economic observation is joined by time and method.",
    "Title-similarity clustering can miss differently worded or cross-language accounts and can join closely worded updates.",
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  "reported_facts": [
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      "attribution": "Radio Television Hong Kong",
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