{
  "source": "Robert J. Shiller, https://shillerdata.com/",
  "read_date": "2026-10-16",
  "raw_sha256": "98a54927942e842ec07ffe73000998e793953708c345b6b27bb363e9ada8366a",
  "sample_start": "1871-01",
  "sample_end": "2025-12",
  "monthly_observations": 1860,
  "strict_monthly_nominal_price_records": 328,
  "return_formula": "TR[t] = TR[t-1] * (P[t] + D[t]/12) / P[t-1]; real_TR[t] = TR[t]/(CPI[t]/CPI[0])",
  "definition": "Strict new nominal monthly-average price record versus every preceding month since January 1871. First observation excluded from both entry groups.",
  "summaries": [
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        "median_annualized_real_pct": 8.784566911046854,
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        "worst": {
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          "end": "1932-06",
          "new_high": false,
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          "cumulative_real_pct": -58.123487057468395,
          "cumulative_nominal_pct": -62.283405561693385
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        "best": {
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}