← the ledger
Watch it decide · Ledger #53

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▰ 0.92· SEP 4, 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 19235 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": "2026-09-03",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.71,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-09-03",
        "name": "FRED · 10-Year Treasury",
        "value": 4.77,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-09-03",
        "name": "FRED · 2-Year Treasury",
        "value": 4.34,
        "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": "2026-09-03",
        "name": "FRED · S&P 500",
        "value": 7747.71,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-09-03",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.71,
        "prevAsOf": "2026-08-27",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.66
      },
      {
        "asOf": "2026-09-03",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.77,
        "prevAsOf": "2026-09-02",
        "seriesId": "DGS10",
        "prevValue": 4.79
      },
      {
        "asOf": "2026-09-03",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.34,
        "prevAsOf": "2026-09-02",
        "seriesId": "DGS2",
        "prevValue": 4.39
      },
      {
        "asOf": "2026-08-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-07-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-09-03",
        "unit": "index",
        "label": "S&P 500",
        "value": 7747.71,
        "prevAsOf": "2026-09-02",
        "seriesId": "SP500",
        "prevValue": 7666.6
      }
    ]
  },
  "briefId": 187,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.71%",
                "caption": "30-year fixed mortgage rose 5 bps to 6.71%, moving slightly higher as long-dated yields held."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.77%",
                "caption": "10-year Treasury eased 2 bps to 4.77%, anchoring the long end while the curve steepened."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.34%",
                "caption": "2-year Treasury fell 5 bps to 4.34%, reflecting softer near-term rate expectations."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%"
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,747.71"
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "At 194 bps, the mortgage-Treasury spread is pricing in elevated uncertainty and credit risk; for originators, this means margin compression on new locks and lower refi incentive—the spread must widen or rates fall materially to unlock volume.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2062,
      "completionTokens": 339
    },
    "summary": "The 30-year fixed climbed 5 bps to 6.71% while the 10-year held steady, pushing the mortgage-Treasury spread to 194 bps—a level that reflects persistent rate volatility and tighter lending margins.",
    "headline": "Mortgage spreads widen as long yields stabilize",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 189
}
05

Proof — the hash-chained record

seq #53
row_hash 3d92d97a04e7e116a583e125389c00dee64f1cf37197c539bea2fe4a85e84860
prev_hash b1b57738b5d4395b21a6a9f1c2bd8dd5bfd3394f68cd89757fba563b263b4734

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.