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Watch it decide · Ledger #18

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▰ 0.92· AUG 30, 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 11001 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": "2026-08-27",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.66,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-08-27",
        "name": "FRED · 10-Year Treasury",
        "value": 4.67,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-08-27",
        "name": "FRED · 2-Year Treasury",
        "value": 4.2,
        "seriesId": "DGS2"
      },
      {
        "url": "https://fred.stlouisfed.org/series/FEDFUNDS",
        "asOf": "2026-07-01",
        "name": "FRED · Fed Funds Rate",
        "value": 3.63,
        "seriesId": "FEDFUNDS"
      },
      {
        "url": "https://fred.stlouisfed.org/series/SP500",
        "asOf": "2026-08-28",
        "name": "FRED · S&P 500",
        "value": 7711.76,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-08-27",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.66,
        "prevAsOf": "2026-08-20",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.65
      },
      {
        "asOf": "2026-08-27",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.67,
        "prevAsOf": "2026-08-26",
        "seriesId": "DGS10",
        "prevValue": 4.66
      },
      {
        "asOf": "2026-08-27",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.2,
        "prevAsOf": "2026-08-26",
        "seriesId": "DGS2",
        "prevValue": 4.19
      },
      {
        "asOf": "2026-07-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-06-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-08-28",
        "unit": "index",
        "label": "S&P 500",
        "value": 7711.76,
        "prevAsOf": "2026-08-27",
        "seriesId": "SP500",
        "prevValue": 7730.99
      }
    ]
  },
  "briefId": 171,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.66%",
                "caption": "30-year fixed mortgage at 6.66%, up 1 bp; refinance threshold remains elevated."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.67%",
                "caption": "10-year Treasury at 4.67%, up 1 bp; long-end stability is constraining mortgage rate relief."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.2%",
                "caption": "2-year Treasury at 4.2%, up 1 bp; near-term rate expectations unchanged."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed Funds Rate holding at 3.63%; no policy move signals maintain forward guidance."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,711.76",
                "caption": "S&P 500 at 7,711.76; equities flat reflects cautious sentiment around rate trajectory."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "At a 199 bps mortgage-to-10Y spread, secondary market pricing remains tight despite the flat curve; expect limited refi incentive and continued pressure on origination margins as long-end yields resist downward moves.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2062,
      "completionTokens": 311
    },
    "summary": "The 30-year fixed sits at 6.66% with the 10Y–2Y curve compressed to 47 bps, reflecting steady long-end demand and persistent rate stickiness.",
    "headline": "Mortgage-Treasury Spread Holds Near 200 bps as Curve Flattens",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 173
}
05

Proof — the hash-chained record

seq #18
row_hash 4ba2f5ef2b27706c6f4bde757247dd498af5b0ad2c8e369ceb2366c1c8a6cee0
prev_hash 48ce1c59c0317d8de6fa5027ae32086bc87cd3e2baed6d593e06bf9eb02820ac

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.