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Watch it decide · Ledger #43

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▱ 0.84· SEP 2, 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 17995 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": 0.84
  },
  "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": "2026-09-01",
        "name": "FRED · 10-Year Treasury",
        "value": 4.79,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-09-01",
        "name": "FRED · 2-Year Treasury",
        "value": 4.39,
        "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": "2026-09-01",
        "name": "FRED · S&P 500",
        "value": 7631.47,
        "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": "2026-09-01",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.79,
        "prevAsOf": "2026-08-31",
        "seriesId": "DGS10",
        "prevValue": 4.75
      },
      {
        "asOf": "2026-09-01",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.39,
        "prevAsOf": "2026-08-31",
        "seriesId": "DGS2",
        "prevValue": 4.34
      },
      {
        "asOf": "2026-08-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-07-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-09-01",
        "unit": "index",
        "label": "S&P 500",
        "value": 7631.47,
        "prevAsOf": "2026-08-31",
        "seriesId": "SP500",
        "prevValue": 7686.14
      }
    ]
  },
  "briefId": 181,
  "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 at 6.66%, up 1 bp in one day—essentially anchored despite Treasury moves."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.79%",
                "caption": "10-year Treasury climbed to 4.79%, up 4 bps; 2-year rose 5 bps to 4.39%, tightening the curve to just 40 bps."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.39%"
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed funds rate unchanged at 3.63%, leaving policy stable as the front end steepens relative to policy."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,631.47",
                "caption": "S&P 500 at 7,631.47, marking a calm backdrop as fixed income takes the focus."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "The flat curve and sticky mortgage rate signal muted refinance incentive—origination will remain purchase-driven. Servicers face persistent prepay pressure if rates hold here, while the narrow mortgage–Treasury spread (187 bps) leaves limited room for margin compression in a refinance spike.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2062,
      "completionTokens": 308
    },
    "summary": "Treasuries climbed across the curve while the 30-year mortgage barely budged, compressing the 10-2 spread to 40 basis points.",
    "headline": "Mortgage Rate Holds at 6.66% as Treasury Curve Flattens Further",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 183
}
05

Proof — the hash-chained record

seq #43
row_hash 451e92621357f63e912c59aa1046b3b72d7a9b75b8c0f4d14eeb17cc2c8e23d6
prev_hash c57fb7df30919dc9b12c10be48a60ff8119f1f422d2337668bb525d6b490d430

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.