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Watch it decide · Ledger #149

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▰ 0.92· SEP 20, 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 16700 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": "2026-09-17",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.95,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-09-17",
        "name": "FRED · 10-Year Treasury",
        "value": 4.94,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-09-17",
        "name": "FRED · 2-Year Treasury",
        "value": 4.67,
        "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": "2026-09-17",
        "name": "FRED · S&P 500",
        "value": 7637.76,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-09-17",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.95,
        "prevAsOf": "2026-09-10",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.76
      },
      {
        "asOf": "2026-09-17",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.94,
        "prevAsOf": "2026-09-16",
        "seriesId": "DGS10",
        "prevValue": 5.01
      },
      {
        "asOf": "2026-09-17",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.67,
        "prevAsOf": "2026-09-16",
        "seriesId": "DGS2",
        "prevValue": 4.74
      },
      {
        "asOf": "2026-08-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-07-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-09-17",
        "unit": "index",
        "label": "S&P 500",
        "value": 7637.76,
        "prevAsOf": "2026-09-16",
        "seriesId": "SP500",
        "prevValue": 7551.81
      }
    ]
  },
  "briefId": 229,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.95%",
                "caption": "30-year fixed jumped to 6.95%, up 19 bps in one day, pricing in tighter long-end yields and reduced refinance appetite."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.94%",
                "caption": "10-year Treasury fell to 4.94%, a 7 bps dip that did not offset the mortgage move, leaving the 201 bps spread wider than the trend."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.67%",
                "caption": "2-year Treasury at 4.67%, down 7 bps in parallel with the 10-year, keeping the front end anchored while long rates remain elevated."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%"
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,637.76",
                "caption": "S&P 500 closed at 7,637.76, stable on the day; equity demand for duration remains in tension with fixed-income volatility."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "The 201 basis-point spread between mortgage and 10-year yields is widening the origination incentive gap: borrowers face sharply worse economics, likely suppressing refi volume and extending loan seasoning, while the flattened curve pressures MSR valuations as prepay risk tilts lower.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2062,
      "completionTokens": 348
    },
    "summary": "The 30-year fixed jumped 19 basis points to 6.95% while the 10–2 Treasury curve compressed to just 27 basis points, signaling mounting refinance headwinds and duration risk for servicers.",
    "headline": "Mortgage rate spike widens spread to Treasuries as curve flattens",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 231
}
05

Proof — the hash-chained record

seq #149
row_hash 775aae3eb748fc7d4a7994839f04a34f1a238167412f2ff6bcc2f9fce5584311
prev_hash 259328639eb8e36e855d786dd0c1f8b95b85c6a1cab241f53538dac234a5e09e

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.