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Watch it decide · Ledger #192

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▱ 0.89· AUG 4, 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 15409 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": 0.89
  },
  "market": {
    "sources": [
      {
        "url": "https://fred.stlouisfed.org/series/MORTGAGE30US",
        "asOf": "2026-07-30",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.66,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-08-03",
        "name": "FRED · 10-Year Treasury",
        "value": 4.7,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-08-03",
        "name": "FRED · 2-Year Treasury",
        "value": 4.25,
        "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": "2026-08-03",
        "name": "FRED · S&P 500",
        "value": 7600.5,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-07-30",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.66,
        "prevAsOf": "2026-07-23",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.58
      },
      {
        "asOf": "2026-08-03",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.7,
        "prevAsOf": "2026-07-31",
        "seriesId": "DGS10",
        "prevValue": 4.75
      },
      {
        "asOf": "2026-08-03",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.25,
        "prevAsOf": "2026-07-31",
        "seriesId": "DGS2",
        "prevValue": 4.28
      },
      {
        "asOf": "2026-07-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-06-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-08-03",
        "unit": "index",
        "label": "S&P 500",
        "value": 7600.5,
        "prevAsOf": "2026-07-31",
        "seriesId": "SP500",
        "prevValue": 7489.72
      }
    ]
  },
  "briefId": 101,
  "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 climbed 8 bps to 6.66%, extending the week's upward drift."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.7%",
                "caption": "10-year treasury fell 5 bps to 4.7%, flattening the curve and widening the mortgage-treasury gap."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.25%",
                "caption": "2-year treasury eased 3 bps to 4.25%, maintaining modest curve steepness at 45 bps."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed funds held at 3.63%, no policy shift signaled."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,600.5",
                "caption": "S&P 500 closed at 7,600.5, steady backdrop for credit conditions."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "The 196 bps mortgage-treasury spread leaves little room for servicing and hedging; refinance volumes may tick up if this yield dip sustains, but origination demand remains suppressed by the elevated 6.66% note rate.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 1992,
      "completionTokens": 326
    },
    "summary": "The 30-year fixed held above 6.6% while the 10-year treasury dipped, pushing the mortgage-treasury spread to nearly 200 basis points and signaling enduring operator margin pressure.",
    "headline": "Mortgage spreads widen as 10-year yields fall; refinance incentive intact but origination headwind persists",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 103
}
05

Proof — the hash-chained record

seq #192
row_hash 25cd594c7cdf2100b89f4ddeef99e6ddbacf9eeb835ff1a24a84a9a87b8d11f6
prev_hash af187a9ba8cc6ac917c25d8378200d83a1223c2df1de83a434a40dcffc94d338

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.