← the ledger
Watch it decide · Ledger #99

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▰ 0.92· SEP 12, 2026, 11:00 AM· 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 12952 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": 207,
  "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 rose 5 bps to 6.76%, trailing a sharper 12 bps jump in the 10-year Treasury."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.95%",
                "caption": "10-year Treasury climbed 12 bps to 4.95%, driving the long end of the curve higher."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.56%",
                "caption": "2-year Treasury rose 13 bps to 4.56%, staying within a narrowing short-end band."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed funds rate unchanged at 3.63%, offering no near-term relief to borrowing costs."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,656.98"
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "Widening mortgage-to-Treasury spreads signal tightening secondary market conditions and rising servicing/hedging costs; operators should monitor whether rate-lock duration extends as borrowers delay decisions in the face of steeper long-end moves.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2062,
      "completionTokens": 316
    },
    "summary": "The 10Y–2Y curve steepened to 39 bps while the 30Y mortgage–10Y spread expanded to 181 bps, even as the 30-year fixed inched up 5 bps to 6.76%.",
    "headline": "Mortgage Spreads Widen as Treasury Curve Steepens; 30-Year Holds Above 6.7%",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 209
}
05

Proof — the hash-chained record

seq #99
row_hash d1863291800b04f765c1abd2ce2ab897f5125117520ecf5ab69c386816f0fcc6
prev_hash 9b22c2a6b71c1453234a77452e72d793b7215ff55abc7518020e3941d8651bf7

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.