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Watch it decide · Ledger #166

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▱ 0.86· JUL 31, 2026, 4:00 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 19077 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": 0.86
  },
  "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": "2026-07-29",
        "name": "FRED · 10-Year Treasury",
        "value": 4.67,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-07-29",
        "name": "FRED · 2-Year Treasury",
        "value": 4.22,
        "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": "2026-07-30",
        "name": "FRED · S&P 500",
        "value": 7437.63,
        "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": "2026-07-29",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.67,
        "prevAsOf": "2026-07-28",
        "seriesId": "DGS10",
        "prevValue": 4.61
      },
      {
        "asOf": "2026-07-29",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.22,
        "prevAsOf": "2026-07-28",
        "seriesId": "DGS2",
        "prevValue": 4.26
      },
      {
        "asOf": "2026-06-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-05-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-07-30",
        "unit": "index",
        "label": "S&P 500",
        "value": 7437.63,
        "prevAsOf": "2026-07-29",
        "seriesId": "SP500",
        "prevValue": 7316.15
      }
    ]
  },
  "briefId": 88,
  "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 rose 8 bps to 6.66%, outpacing the 10-year Treasury's 6 bps move."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.67%",
                "caption": "10-year Treasury climbed to 4.67%, pushing the 30–10 spread to 199 bps."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.22%",
                "caption": "2-year Treasury eased 4 bps to 4.22%, flattening the 2–10 curve to just 45 bps."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed funds rate held at 3.63%, leaving policy steady as the curve structure tightens."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,437.63",
                "caption": "S&P 500 closed at 7,437.63, with equities tracking the long-end yield drift."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "Wider mortgage spreads and a flattened curve signal tightening MSR duration and hedging complexity: servicers face longer-duration asset floors as refi incentive stays suppressed, while refinance origination volume remains locked out by the elevated 30-year coupon.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 1992,
      "completionTokens": 345
    },
    "summary": "The 30-year fixed hit 6.66%, outpacing the 10-year by 199 bps, while the 2–10 curve compressed to just 45 bps.",
    "headline": "Mortgage spreads widen as long rates jump; curve flattens further",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 90
}
05

Proof — the hash-chained record

seq #166
row_hash 95a893aeca42f910a7aef41a5666401bde4a1b4bd66e011243388f5baeb21288
prev_hash 7143dee16e181718ad314219192f4b7946b02893f519f41f862b57a065248ad2

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.