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Watch it decide · Ledger #160

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▱ 0.78· JUL 30, 2026, 1:40 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 6109 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": 0.78
  },
  "market": {
    "sources": [
      {
        "url": "https://fred.stlouisfed.org/series/MORTGAGE30US",
        "asOf": "2026-07-23",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.58,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-07-28",
        "name": "FRED · 10-Year Treasury",
        "value": 4.61,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-07-28",
        "name": "FRED · 2-Year Treasury",
        "value": 4.26,
        "seriesId": "DGS2"
      },
      {
        "url": "https://fred.stlouisfed.org/series/FEDFUNDS",
        "asOf": "2026-06-01",
        "name": "FRED · Fed Funds Rate",
        "value": 3.63,
        "seriesId": "FEDFUNDS"
      },
      {
        "url": "https://fred.stlouisfed.org/series/SP500",
        "asOf": "2026-07-29",
        "name": "FRED · S&P 500",
        "value": 7316.15,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-07-23",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.58,
        "prevAsOf": "2026-07-16",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.55
      },
      {
        "asOf": "2026-07-28",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.61,
        "prevAsOf": "2026-07-27",
        "seriesId": "DGS10",
        "prevValue": 4.65
      },
      {
        "asOf": "2026-07-28",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.26,
        "prevAsOf": "2026-07-27",
        "seriesId": "DGS2",
        "prevValue": 4.31
      },
      {
        "asOf": "2026-06-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-05-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-07-29",
        "unit": "index",
        "label": "S&P 500",
        "value": 7316.15,
        "prevAsOf": "2026-07-28",
        "seriesId": "SP500",
        "prevValue": 7428.78
      }
    ]
  },
  "briefId": 84,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.58%",
                "caption": "30-year fixed rose 3 bps to 6.58%, marking stickier pricing than Treasury weakness suggests."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.61%",
                "caption": "10-year Treasury fell 4 bps to 4.61%, but the mortgage-Treasury spread widened to 197 bps."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.26%",
                "caption": "2-year Treasury fell 5 bps to 4.26%, keeping the 10Y–2Y curve flattened at just 35 bps."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed Funds held steady at 3.63%, exerting no fresh pressure on near-term rate expectations."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,316.15",
                "caption": "S&P 500 closed at 7,316.15, offering no material shock to equity-linked hedging or portfolio positioning."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "For originators, the widening 6.58%–4.61% gap signals persistent mortgage pricing power despite long-end yield relief; refi incentives remain muted at current levels, and servicers face a stable prepay environment while the shallow 35 bps curve keeps secondary market hedging costs elevated.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 1992,
      "completionTokens": 375
    },
    "summary": "The 30-year fixed climbed 3 bps to 6.58% while the 10-year Treasury fell 4 bps, pushing the spread to 197 bps—a notable divergence that signals mortgage pricing holding firmer than duration.",
    "headline": "Mortgage-Treasury Spread Widens as 10Y Dips; Curve Remains Shallow",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 86
}
05

Proof — the hash-chained record

seq #160
row_hash 4ea73b27f635c5d63f7e10673b65c52277eb4a25500fd745010fe19264758fb7
prev_hash 1ba687305805d55810bdcc0d7e04e794bdfaa6fb71fdc728dc7a1316d4b850d3

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.