Watch it decide · Ledger #288
daily-brief · MarketData+BriefComposer
published· conf ▰▰▰▰▰ 0.92· AUG 20, 2026, 9:00 PM· anthropic/claude-haiku-4.5· constitution v5
01
Inputs — what it was given
{}02
Sources read — 5 cited
- FRED · 30-Year Fixed Mortgage — 6.65 · 2026-08-20
- FRED · 10-Year Treasury — 4.65 · 2026-08-19
- FRED · 2-Year Treasury — 4.19 · 2026-08-19
- FRED · Fed Funds Rate — 3.63 · 2026-07-01
- FRED · S&P 500 — 7707.98 · 2026-08-19
03
The gate — deterministic verdict
Decision: published · computed in 17885 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": "2026-08-19",
"name": "FRED · 10-Year Treasury",
"value": 4.65,
"seriesId": "DGS10"
},
{
"url": "https://fred.stlouisfed.org/series/DGS2",
"asOf": "2026-08-19",
"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": "2026-08-19",
"name": "FRED · S&P 500",
"value": 7707.98,
"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": "2026-08-19",
"unit": "percent",
"label": "10-Year Treasury",
"value": 4.65,
"prevAsOf": "2026-08-18",
"seriesId": "DGS10",
"prevValue": 4.71
},
{
"asOf": "2026-08-19",
"unit": "percent",
"label": "2-Year Treasury",
"value": 4.19,
"prevAsOf": "2026-08-18",
"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": "2026-08-19",
"unit": "index",
"label": "S&P 500",
"value": 7707.98,
"prevAsOf": "2026-08-18",
"seriesId": "SP500",
"prevValue": 7691.76
}
]
},
"briefId": 143,
"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 fell 2 bps to 6.65%, the smallest one-day move in this batch."
},
{
"kind": "Stat",
"label": "10-Year Treasury",
"value": "4.65%",
"caption": "10-year Treasury dropped 6 bps to 4.65%, driving the larger long-end repricing."
},
{
"kind": "Stat",
"label": "2-Year Treasury",
"value": "4.19%",
"caption": "2-year held flat at 4.19%, showing near-term rate expectations stable."
},
{
"kind": "Stat",
"label": "Fed Funds Rate",
"value": "3.63%"
},
{
"kind": "Stat",
"label": "S&P 500",
"value": "7,707.98",
"caption": "S&P 500 at 7,707.98 (as of 2026-08-19), equity strength supporting demand backdrop."
}
]
},
{
"kind": "Text",
"text": "What it means for your shop",
"emphasis": "mono"
},
{
"kind": "Callout",
"text": "The 200 bp spread between 30-year mortgages and 10-year Treasuries gives originators breathing room on volume, but the 46 bp 10–2 curve flattening signals rate-sensitive refi demand remains muted; near-term MSR prepay risk stays modest.",
"tone": "info"
}
]
},
"title": "markets & rates"
},
"label": "autonomous · AI-generated",
"usage": {
"promptTokens": 1988,
"completionTokens": 310
},
"summary": "Long-end yields retreated while the 30-year mortgage rate edged lower, pushing the origination-rate premium to 200 bps—a structurally wide cushion for lenders.",
"headline": "Mortgage Spread Widens as Treasuries Fall; 10–2 Curve Flattens to 46 bps",
"disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
},
"artifactId": 145
}05
Proof — the hash-chained record
seq #288
row_hash 5fc3215e9362789573a113fe7537c8bdf9431b5b6695cd9672a1e72390db337d
prev_hash 872da23becabe94b0244f03bfc3f17a37d1eae5df29a2975277d89a32364b9e7
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.