← the ledger
Watch it decide · Ledger #172

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▱ 0.84· SEP 23, 2026, 9:00 PM· anthropic/claude-haiku-4.5· constitution v5

01

Inputs — what it was given

{}
02

Sources read — 5 cited

03

The gate — deterministic verdict

Decision: published · computed in 18263 ms

5/5 series, all sourced and fresh.

04

Outputs — what it produced

{
  "gate": {
    "pass": true,
    "reason": "5/5 series, all sourced and fresh.",
    "confidence": 0.84
  },
  "market": {
    "sources": [
      {
        "url": "https://fred.stlouisfed.org/series/MORTGAGE30US",
        "asOf": "2026-09-17",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.95,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-09-22",
        "name": "FRED · 10-Year Treasury",
        "value": 4.96,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-09-22",
        "name": "FRED · 2-Year Treasury",
        "value": 4.71,
        "seriesId": "DGS2"
      },
      {
        "url": "https://fred.stlouisfed.org/series/FEDFUNDS",
        "asOf": "2026-08-01",
        "name": "FRED · Fed Funds Rate",
        "value": 3.63,
        "seriesId": "FEDFUNDS"
      },
      {
        "url": "https://fred.stlouisfed.org/series/SP500",
        "asOf": "2026-09-22",
        "name": "FRED · S&P 500",
        "value": 7764.64,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-09-17",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.95,
        "prevAsOf": "2026-09-10",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.76
      },
      {
        "asOf": "2026-09-22",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.96,
        "prevAsOf": "2026-09-21",
        "seriesId": "DGS10",
        "prevValue": 4.96
      },
      {
        "asOf": "2026-09-22",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.71,
        "prevAsOf": "2026-09-21",
        "seriesId": "DGS2",
        "prevValue": 4.76
      },
      {
        "asOf": "2026-08-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-07-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-09-22",
        "unit": "index",
        "label": "S&P 500",
        "value": 7764.64,
        "prevAsOf": "2026-09-21",
        "seriesId": "SP500",
        "prevValue": 7764.7
      }
    ]
  },
  "briefId": 238,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.95%",
                "caption": "30-year fixed mortgage jumped to 6.95%, up 19 bps in one day."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.96%",
                "caption": "10-year Treasury held steady at 4.96%, offering no relief."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.71%",
                "caption": "2-year Treasury fell 5 bps to 4.71%, flattening the front end."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed funds rate unchanged at 3.63% as of early August."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,764.64",
                "caption": "S&P 500 closed at 7,764.64, unchanged in tone from prior day."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "A 19 bps one-day move in mortgage rates reshuffles origination economics and refi thresholds sharply; the flattening curve and widening mortgage–Treasury spread (now 199 bps) suggest lenders face tighter margins and servicers should brace for elevated prepay risk if refi windows remain competitive.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2060,
      "completionTokens": 308
    },
    "summary": "The 30-year fixed mortgage spiked to 6.95% while the 10–2 Treasury spread compressed, signaling tighter credit conditions ahead.",
    "headline": "Mortgage rates jump 19 bps as curve flattens to 25 bps",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 240
}
05

Proof — the hash-chained record

seq #172
row_hash 19469d2c9ee219fffb427be93adefac19801c1433dc851bcccd6dcf398a1183a
prev_hash dc3b24b00436f4f0d17035ad82e598bb6dfeff4fc431eff4a1935bf54c8da258

This exact row, with its canonical preimage, is public at /api/ledger/export. Recompute its hash with the standalone verifier — it shares no code with this site. The chain head is timestamped into Bitcoin.

Evidence or it doesn't ship.