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Watch it decide · Ledger #230

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▰ 0.92· OCT 3, 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 15012 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": "2026-10-01",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 7.28,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-10-01",
        "name": "FRED · 10-Year Treasury",
        "value": 5.24,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-10-01",
        "name": "FRED · 2-Year Treasury",
        "value": 4.78,
        "seriesId": "DGS2"
      },
      {
        "url": "https://fred.stlouisfed.org/series/FEDFUNDS",
        "asOf": "2026-09-01",
        "name": "FRED · Fed Funds Rate",
        "value": 3.75,
        "seriesId": "FEDFUNDS"
      },
      {
        "url": "https://fred.stlouisfed.org/series/SP500",
        "asOf": "2026-10-02",
        "name": "FRED · S&P 500",
        "value": 7722.72,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-10-01",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 7.28,
        "prevAsOf": "2026-09-24",
        "seriesId": "MORTGAGE30US",
        "prevValue": 7.03
      },
      {
        "asOf": "2026-10-01",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 5.24,
        "prevAsOf": "2026-09-30",
        "seriesId": "DGS10",
        "prevValue": 5.29
      },
      {
        "asOf": "2026-10-01",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.78,
        "prevAsOf": "2026-09-30",
        "seriesId": "DGS2",
        "prevValue": 4.88
      },
      {
        "asOf": "2026-09-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.75,
        "prevAsOf": "2026-08-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-10-02",
        "unit": "index",
        "label": "S&P 500",
        "value": 7722.72,
        "prevAsOf": "2026-10-01",
        "seriesId": "SP500",
        "prevValue": 7666.45
      }
    ]
  },
  "briefId": 264,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "7.28%",
                "caption": "30-year fixed jumped 25 bps to 7.28%, the sharpest single-day move in weeks."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "5.24%",
                "caption": "10-year Treasury ticked down 5 bps to 5.24%, offering no relief to the mortgage spread."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.78%",
                "caption": "2-year fell 10 bps to 4.78%, as curve flattening accelerated the 10Y–2Y to 46 bps."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.75%",
                "caption": "Fed funds rose 12 bps to 3.75%, reflecting hawkish repricing at the short end."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,722.72",
                "caption": "S&P 500 closed at 7,722.72, stable on the day despite rate volatility."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "The 204 bps mortgage-to-10Y spread is now materially wider than its summer range, which narrows refinance incentives and pressures origination margins on purchase business. Servicers face heightened prepay risk only if rates fall; current momentum favors extension of duration risk in the MSR book.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2064,
      "completionTokens": 346
    },
    "summary": "Longer-duration lending costs rose sharply on Thursday while the 10/2 curve compressed, signaling persistent term premium pressure.",
    "headline": "Mortgage spread blows out as 30-year fixed jumps 25 bps; curve flattens to 46 bps",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 266
}
05

Proof — the hash-chained record

seq #230
row_hash 50f4793a5dbaab3f45e37ea9556668c26d667a7ebc6879b057a95bcb63a0e422
prev_hash 6a48fd9ae906cccb935ec1a6b8f72b01098622736e93af80bf83b87bd812b9d0

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.