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Watch it decide · Ledger #5

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▰ 0.92· AUG 27, 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 8151 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": "2026-08-27",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.66,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-08-26",
        "name": "FRED · 10-Year Treasury",
        "value": 4.66,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-08-26",
        "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": "2026-08-26",
        "name": "FRED · S&P 500",
        "value": 7675.7,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-08-27",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.66,
        "prevAsOf": "2026-08-20",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.65
      },
      {
        "asOf": "2026-08-26",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.66,
        "prevAsOf": "2026-08-25",
        "seriesId": "DGS10",
        "prevValue": 4.64
      },
      {
        "asOf": "2026-08-26",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.19,
        "prevAsOf": "2026-08-25",
        "seriesId": "DGS2",
        "prevValue": 4.17
      },
      {
        "asOf": "2026-07-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-06-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-08-26",
        "unit": "index",
        "label": "S&P 500",
        "value": 7675.7,
        "prevAsOf": "2026-08-25",
        "seriesId": "SP500",
        "prevValue": 7677.28
      }
    ]
  },
  "briefId": 164,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.66%",
                "caption": "30-year mortgage ticked to 6.66%, up 1 bp in a single day amid broader Treasury yield moves."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.66%",
                "caption": "10-year Treasury rose 2 bps to 4.66%, anchoring the front end of rate risk for portfolio managers."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.19%",
                "caption": "2-year Treasury climbed 2 bps to 4.19%, keeping the curve shallow at just 47 bps."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed funds rate held flat at 3.63%, offering no fresh impulse to near-term rate direction."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,675.7",
                "caption": "S&P 500 closed at 7,675.7, reflecting modest equity positioning alongside the rate complex."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "The persistence of a 200 bp spread despite a modestly steeper 2Y–10Y curve (47 bps) signals continued pressure on net margins for originators: rate locks remain expensive relative to funding costs, and any near-term refi demand hinges on mortgage rates falling faster than treasuries, not merely matching them.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 2060,
      "completionTokens": 343
    },
    "summary": "The 30-year mortgage bumped 1 bp higher to 6.66% while treasuries rose across the curve, leaving the 200 bp mortgage-to-10Y gap intact.",
    "headline": "Mortgage-Treasury Spread Holds Steady as Short End Steepens",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 166
}
05

Proof — the hash-chained record

seq #5
row_hash f98331b4da67357379d35a96e45584addbe30d7eb107783d55037bf9e9bebbfb
prev_hash 1765f6b8dfd88877f0a06c0894d616c8f421c73674b4d31f3f978b5b5a5f8e65

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.