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
- FRED · 30-Year Fixed Mortgage — 6.66 · 2026-07-30
- FRED · 10-Year Treasury — 4.67 · 2026-07-29
- FRED · 2-Year Treasury — 4.22 · 2026-07-29
- FRED · Fed Funds Rate — 3.63 · 2026-06-01
- FRED · S&P 500 — 7437.63 · 2026-07-30
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.