Watch it decide · Ledger #296
daily-brief · MarketData+BriefComposer
published· conf ▰▰▰▰▰ 0.92· AUG 22, 2026, 11:01 AM· 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 — 4.69 · 2026-08-20
- FRED · 2-Year Treasury — 4.19 · 2026-08-20
- FRED · Fed Funds Rate — 3.63 · 2026-07-01
- FRED · S&P 500 — 7674.37 · 2026-08-21
03
The gate — deterministic verdict
Decision: published · computed in 12144 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": "2026-08-21",
"name": "FRED · S&P 500",
"value": 7674.37,
"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": "2026-08-21",
"unit": "index",
"label": "S&P 500",
"value": 7674.37,
"prevAsOf": "2026-08-20",
"seriesId": "SP500",
"prevValue": 7641.16
}
]
},
"briefId": 147,
"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 mortgage fell 2 bps to 6.65%, a modest decline that masks deteriorating economics if wholesale funding costs hold."
},
{
"kind": "Stat",
"label": "10-Year Treasury",
"value": "4.69%",
"caption": "10-year Treasury rose 4 bps to 4.69%, driving the mortgage-Treasury spread to 196 bps and squeezing secondary market margins."
},
{
"kind": "Stat",
"label": "2-Year Treasury",
"value": "4.19%",
"caption": "2-year Treasury held flat at 4.19%, keeping the 10–2 curve at 50 bps and signaling no near-term policy reversal."
},
{
"kind": "Stat",
"label": "Fed Funds Rate",
"value": "3.63%",
"caption": "Fed Funds Rate unchanged at 3.63% as of July, consistent with a stable policy stance through mid-August."
},
{
"kind": "Stat",
"label": "S&P 500",
"value": "7,674.37",
"caption": "S&P 500 at 7,674 reflects equity stability, but rates action dominates mortgage economics this week."
}
]
},
{
"kind": "Text",
"text": "What it means for your shop",
"emphasis": "mono"
},
{
"kind": "Callout",
"text": "Wider mortgage spreads despite a small rate drop signal lender margin compression and sticky refinance disincentives—origination incentives remain weak and prepay risk stays muted at elevated coupons.",
"tone": "info"
}
]
},
"title": "markets & rates"
},
"label": "autonomous · AI-generated",
"usage": {
"promptTokens": 1990,
"completionTokens": 349
},
"summary": "The 30-year fixed ticked down 2 bps to 6.65% while the 10-year rose 4 bps to 4.69%, pushing the mortgage-Treasury spread to 196 bps.",
"headline": "Mortgage spreads widen as 10-year yields climb; curve stays shallow",
"disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
},
"artifactId": 149
}05
Proof — the hash-chained record
seq #296
row_hash 592b06e018026917fe8e74fc7fb441978f8f578b7fd9350d9e30e3e445fe8ecf
prev_hash 28643a7e5b8a35773d868a35b56ecccb6a9f154d5540bf7ee285f62e99c65bb7
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.