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Watch it decide · Ledger #293

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▰ 0.92· AUG 21, 2026, 9:01 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 21404 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": "2026-08-20",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.65,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-08-20",
        "name": "FRED · 10-Year Treasury",
        "value": 4.69,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-08-20",
        "name": "FRED · 2-Year Treasury",
        "value": 4.19,
        "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": "2026-08-20",
        "name": "FRED · S&P 500",
        "value": 7641.16,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-08-20",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.65,
        "prevAsOf": "2026-08-13",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.67
      },
      {
        "asOf": "2026-08-20",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.69,
        "prevAsOf": "2026-08-19",
        "seriesId": "DGS10",
        "prevValue": 4.65
      },
      {
        "asOf": "2026-08-20",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.19,
        "prevAsOf": "2026-08-19",
        "seriesId": "DGS2",
        "prevValue": 4.19
      },
      {
        "asOf": "2026-07-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-06-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-08-20",
        "unit": "index",
        "label": "S&P 500",
        "value": 7641.16,
        "prevAsOf": "2026-08-19",
        "seriesId": "SP500",
        "prevValue": 7707.98
      }
    ]
  },
  "briefId": 146,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.65%",
                "caption": "30-year fixed at 6.65%, down 2 bps — minimal daily movement signals steady origination demand."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.69%",
                "caption": "10-year Treasury rose 4 bps to 4.69%, dragging the mortgage-Treasury spread to 196 bps."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.19%",
                "caption": "2-year Treasury unchanged at 4.19%, holding the front end flat against the 10-year."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed funds rate at 3.63%, last updated 2026-07-01, remains unchanged pending next policy move."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,641.16",
                "caption": "S&P 500 at 7,641.16 — equity stability provides no tail hedging incentive for fixed-income duration extension."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "The 50 basis point 10Y–2Y spread leaves little room for refi incentive and signals persistent prepay risk; operators should monitor whether the curve steepens or flattens further, as sustained inversion of the spread would begin to ease refinance pressure.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 1990,
      "completionTokens": 328
    },
    "summary": "A modest uptick in the 10-year yield paired with stable short rates keeps the mortgage-Treasury spread near 196 basis points.",
    "headline": "30-Year Mortgage Holds Firm at 6.65% as Treasury Curve Flattens",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 148
}
05

Proof — the hash-chained record

seq #293
row_hash 5782767446d3f00eafaa15f924062098ac54898403dee839fa2296a23a335568
prev_hash 703309b353f6529a05fb643de8f929dcddf036b2dbe132b3061d824f5c49586f

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.