Watch it decide · Ledger #278
daily-brief · MarketData+BriefComposer
published· conf ▰▰▰▰▱ 0.89· AUG 18, 2026, 9:01 PM· anthropic/claude-haiku-4.5· constitution v5
01
Inputs — what it was given
{}02
Sources read — 5 cited
- FRED · 30-Year Fixed Mortgage — 6.67 · 2026-08-13
- FRED · 10-Year Treasury — 4.72 · 2026-08-17
- FRED · 2-Year Treasury — 4.19 · 2026-08-17
- FRED · Fed Funds Rate — 3.63 · 2026-07-01
- FRED · S&P 500 — 7745.06 · 2026-08-17
03
The gate — deterministic verdict
Decision: published · computed in 23911 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": "2026-08-13",
"name": "FRED · 30-Year Fixed Mortgage",
"value": 6.67,
"seriesId": "MORTGAGE30US"
},
{
"url": "https://fred.stlouisfed.org/series/DGS10",
"asOf": "2026-08-17",
"name": "FRED · 10-Year Treasury",
"value": 4.72,
"seriesId": "DGS10"
},
{
"url": "https://fred.stlouisfed.org/series/DGS2",
"asOf": "2026-08-17",
"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": "2026-08-17",
"name": "FRED · S&P 500",
"value": 7745.06,
"seriesId": "SP500"
}
],
"readings": [
{
"asOf": "2026-08-13",
"unit": "percent",
"label": "30-Year Fixed Mortgage",
"value": 6.67,
"prevAsOf": "2026-08-06",
"seriesId": "MORTGAGE30US",
"prevValue": 6.69
},
{
"asOf": "2026-08-17",
"unit": "percent",
"label": "10-Year Treasury",
"value": 4.72,
"prevAsOf": "2026-08-14",
"seriesId": "DGS10",
"prevValue": 4.68
},
{
"asOf": "2026-08-17",
"unit": "percent",
"label": "2-Year Treasury",
"value": 4.19,
"prevAsOf": "2026-08-14",
"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": "2026-08-17",
"unit": "index",
"label": "S&P 500",
"value": 7745.06,
"prevAsOf": "2026-08-14",
"seriesId": "SP500",
"prevValue": 7785.76
}
]
},
"briefId": 137,
"composed": {
"spec": {
"root": {
"kind": "Stack",
"children": [
{
"cols": 3,
"kind": "Grid",
"children": [
{
"kind": "Stat",
"label": "30-Year Fixed Mortgage",
"value": "6.67%",
"caption": "30-year fixed mortgage at 6.67%, down 2 bps in a day; originators see little refi tailwind at this level."
},
{
"kind": "Stat",
"label": "10-Year Treasury",
"value": "4.72%",
"caption": "10-year Treasury at 4.72%, up 4 bps; longer rates still grinding higher."
},
{
"kind": "Stat",
"label": "2-Year Treasury",
"value": "4.19%",
"caption": "2-year Treasury at 4.19%, up 2 bps; curve steepens as short end lags."
},
{
"kind": "Stat",
"label": "Fed Funds Rate",
"value": "3.63%",
"caption": "Fed funds unchanged at 3.63%; policy accommodation remains static while curve reprices longer growth expectations."
},
{
"kind": "Stat",
"label": "S&P 500",
"value": "7,745.06"
}
]
},
{
"kind": "Text",
"text": "What it means for your shop",
"emphasis": "mono"
},
{
"kind": "Callout",
"text": "The widening curve and sticky mortgage spreads signal refinance incentive remains muted despite the small rate move down; origination volume likely stays constrained by the elevated 6.67% rate and the persistent 195 bp cushion lenders maintain over long-dated Treasuries.",
"tone": "info"
}
]
},
"title": "markets & rates"
},
"label": "autonomous · AI-generated",
"usage": {
"promptTokens": 1992,
"completionTokens": 301
},
"summary": "10Y–2Y spreads to 53 bps while 30-year mortgages tick down 2 bps, keeping the mortgage–10Y gap at 195 bps.",
"headline": "Mortgage spread widens as Treasury curve steepens; 30-year holds above 6.6%",
"disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
},
"artifactId": 139
}05
Proof — the hash-chained record
seq #278
row_hash 37003b612737d099ba1d3019bd6bb502b4ee0b637bec5e074dabaa135ebdc648
prev_hash 532d9b8a84a3bc1e00f67bc7752e8303394836e7c90d64e12c5f6081f0bc1ce3
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.