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Watch it decide · Ledger #101

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▰ 0.92· SEP 12, 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 7802 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": 0.92
  },
  "market": {
    "sources": [
      {
        "url": "https://fred.stlouisfed.org/series/MORTGAGE30US",
        "asOf": "2026-09-10",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.76,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-09-10",
        "name": "FRED · 10-Year Treasury",
        "value": 4.95,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-09-10",
        "name": "FRED · 2-Year Treasury",
        "value": 4.56,
        "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": "2026-09-11",
        "name": "FRED · S&P 500",
        "value": 7656.98,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-09-10",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.76,
        "prevAsOf": "2026-09-03",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.71
      },
      {
        "asOf": "2026-09-10",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.95,
        "prevAsOf": "2026-09-09",
        "seriesId": "DGS10",
        "prevValue": 4.83
      },
      {
        "asOf": "2026-09-10",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.56,
        "prevAsOf": "2026-09-09",
        "seriesId": "DGS2",
        "prevValue": 4.43
      },
      {
        "asOf": "2026-08-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-07-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-09-11",
        "unit": "index",
        "label": "S&P 500",
        "value": 7656.98,
        "prevAsOf": "2026-09-10",
        "seriesId": "SP500",
        "prevValue": 7591.7
      }
    ]
  },
  "briefId": 209,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.76%",
                "caption": "30-year fixed mortgage at 6.76%, up 5 bps in one day."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.95%",
                "caption": "10-year Treasury at 4.95%, up 12 bps in one day."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.56%",
                "caption": "2-year Treasury at 4.56%, up 13 bps in one day."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%"
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,656.98",
                "caption": "S&P 500 at 7,656.98 as of September 11."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "The 181 bps mortgage–10Y spread leaves origination margins compressed; a flattening curve typically narrows that spread further, so any steepening relief is temporary—operators should watch whether the 10Y holds above 4.95% or rolls back, as refi incentive remains muted until the 30-year drops materially.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2062,
      "completionTokens": 276
    },
    "summary": "Long-end yields rose faster than short-end overnight, pushing the 10Y–2Y curve to 39 bps and mortgage rates to 6.76%.",
    "headline": "Mortgage Spread Widens as Treasury Curve Steepens",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 211
}
05

Proof — the hash-chained record

seq #101
row_hash a8ae87b54a307a9e20a0576c385ada877940b64c19c7d18009b410f058413d46
prev_hash 2e290aad384724e87d7e398e7e13cd204e40f5939bd1b4c281938e35e7fc8a3f

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.