Experimental index of four market signals; not a recession probability.
Static retained snapshot: generated 2026-08-21; newest market input 2026-08-20. JavaScript attempts to load the latest published reading. Source dates, not page-build time, determine freshness.
How to read this index
Higher means more stress in this experimental 0–1 market index; lower means less. It is not a recession probability.
Historical values are retrospective replays. The static retained snapshot was generated 2026-08-21; its newest market input is 2026-08-20. The chart may refresh to a newer reading: use the date and category displayed with that reading.
US market fragility index — experimental · sealed recordretained input through 2026-08-20
0.289
What it cannot see: the reading
says nothing about exogenous shocks — a war, a pandemic, a policy accident —
that arrive from outside its four market drivers. Its retrospective record on credit-cycle
drawdowns is mixed: elevated ahead of the dot-com peak, only watch before the
2008 crisis, and no elevated lead before the 2020 drawdown. Read it as a monitor, not a
proven leading indicator.
Historical index and conditional future paths
Solid line: historical index. Dashed paths: conditional on authored future inputs, with no assigned probabilities. They are separate from the sealed prediction.
Retained scenario snapshot: 2026-09-20; market inputs through 2026-09-18. The static diagram belongs to this dated snapshot. JavaScript checks its identity against the reading above before enabling comparison.
At 2027Q3: Optimistic · easing market stress 0.132; Reference · unchanged drivers 0.240; Pessimistic · higher market stress 0.894. These are conditional calculations with no assigned probabilities.
History alone uses a 0–0.66 frame (extending if needed). With future scenarios visible, the frame is 0–1 so stress paths are not clipped.
The line steps at quarter ends by construction — daily movement enters
only through quarter-to-date driver means. Historical points are replays computed from
today’s source vintages, not an archive of values published on those dates.
Conditional index values; no assigned probabilities. Current quarter assumed to settle unchanged.
Quarter
Optimistic · easing market stress
Reference · unchanged drivers
Pessimistic · higher market stress
2026Q4
0.205703
0.263113
0.611791
2027Q1
0.163763
0.249879
0.772895
2027Q2
0.142794
0.243262
0.853448
2027Q3
0.132309
0.239954
0.893724
Scenario assumptions and how to read the paths
Optimistic means lower index stress, pessimistic means higher stress, and reference holds the current drivers unchanged. None is a most-probable forecast; no probabilities or confidence intervals have been established.
Authored inputs held in each future quarter; no probability ranking
Scenario
10y–2y yield spread (pp)
Baa–10y credit spread (pp)
VIX
CAPE
Optimistic · easing market stress
1
1.5
14
30
Pessimistic · higher market stress
-0.5
4
35
40
Reference
Hold all four origin driver inputs unchanged. The index may still move as smoothing and retained history evolve.
The provisional quarter is assumed to close unchanged. The model then processes the stated inputs once per future quarter. Its retained inversion memory and smoothing can change the reference index even when drivers stay constant. The 0–1 scale accommodates all scenarios; its values are not recession probabilities. “Optimistic” does not imply an investment return.
Retained index history, not an archive of the values available at each historical date. Dashed future paths, when available, are conditional scenarios without probabilities. Units: index points, 0–1.
Date / observation period
Historical index (retrospective replay)
2016Q3
0.181
2016Q4
0.155
2017Q1
0.145
2017Q2
0.141
2017Q3
0.13
2017Q4
0.113
2018Q1
0.123
2018Q2
0.134
2018Q3
0.174
2018Q4
0.228
2019Q1
0.246
2019Q2
0.247
2019Q3
0.258
2019Q4
0.255
2020Q1
0.338
2020Q2
0.43
2020Q3
0.417
2020Q4
0.396
2021Q1
0.365
2021Q2
0.309
2021Q3
0.242
2021Q4
0.203
2022Q1
0.231
2022Q2
0.303
2022Q3
0.427
2022Q4
0.522
2023Q1
0.498
2023Q2
0.481
2023Q3
0.452
2023Q4
0.437
2024Q1
0.449
2024Q2
0.455
2024Q3
0.464
2024Q4
0.47
2025Q1
0.483
2025Q2
0.507
2025Q3
0.494
2025Q4
0.442
2026Q1
0.4
2026Q2
0.343
2026Q3
0.289
How to read the fragility view
What the number is
A single 0–1 score summarising market conditions associated
with credit-cycle stress — an experimental index, not a measurement of every private
balance-sheet exposure. It combines four families of public market driver:
the term structure of interest rates, a credit spread, equity
volatility, and an equity valuation level. Higher means a higher combined
market-conditions score under this method — not a higher probability of any
event, and not a reading of the debt-service, refinancing, contagion, external or
fiscal buffers dimensions named above, which this index does not feed and do not feed
it. It does not directly observe household debt service, corporate refinancing needs,
cash buffers or bank positions; those belong to separate, separately named models.
The model recomputes the score daily and publishes it to cloud
storage; this page reads that published copy (with a baked fallback that is labelled
when stale). The inputs have different cadences: the market legs publish daily,
usually a day or two apart, while the valuation leg is an annual curated value held
constant through the year — so a daily publication is not four daily observations.
Daily movement enters only through quarter-to-date driver means — a single day cannot
swing the reading on its own, which is why the line is smooth and why a still-open
quarter is marked provisional.
Input
Plain explanation
Limitation to retain
Treasury yield curve
The difference between long- and shorter-term Treasury
yields; recent flat/inverted conditions raise this component.
Retained history can keep it elevated after the current
curve changes.
Corporate credit spread
The extra yield on Baa corporate debt relative to
Treasuries.
A market financing indicator, not the amount of debt or a
measure of total balance-sheet losses.
Equity volatility
The VIX measure of expected equity-market volatility.
Often responds during a sell-off; it does not necessarily
lead the shock.
Equity valuation
Share prices relative to long-run earnings, using CAPE.
Annual input in this implementation; high valuation alone
does not identify when a decline will occur.
The yield-curve input is the 10-year Treasury yield minus the
2-year yield. See the rates, their spread and the market index together in our
yield-curve guide.
What the regimes mean
The four regime names are bands of the combined score, not a
count of stretched legs — a weighted composite does not enforce a fixed number of
drivers being stretched at any given band. Elevated is the one precisely
defined boundary: the reading is above 0.40, the sealed tripwire's own public
criterion. Benign, Watch and Fragile are authored categories
on either side of it: the thresholds were chosen by this model's authors, and crossing
one is a statement about the combined index, not a calibrated probability of any
event and not a tally of how many of the four inputs are individually stretched.
What it is not
It is not a market call, not a recession probability, not a
timing signal, and not a demonstrated forecasting record. It is model-conditional:
it says what this model reads from these drivers. Its retrospective record on
credit-cycle drawdowns is mixed (stated above), and it says nothing about exogenous
shocks — a war, a pandemic, a policy accident — that arrive from outside its
market drivers.
Why the US line is different
The US reading is the sealed
instrument: all four legs are the United States' own published series — three at
daily frequency, the valuation leg an annual curated value — and the same instrument
stands behind a sealed, dated, scoreable prediction in the ledger. When it is wrong,
it will be scored in public like any other entry. Sealing makes the record checkable;
it does not, by itself, make the model right.
Why the other lines are approximate
No other economy has four keyless daily drivers of its own. The
comparison lines fill the gaps with declared proxies — a regional credit spread instead
of a national one, a global volatility index, market capitalisation over GDP as the
valuation leg, normalised against that country's own history. Each substitution is
listed on the country card on the home page.
That makes each of them useful for watching its own economy's
direction of travel. It does not make them the same instrument as the US index,
and it does not support ranking economies against each other — the same numeric value
need not represent the same exposure in two countries. They are
approximate: not sealed, not scored, and never
published as predictions.
Where we publish nothing. A country reading is not
the US instrument pointed at other data: with legs missing, and monthly, lagged inputs,
it would be a different model with a different calibration — and it would need its own
sealed lanes before it deserved to be called a prediction. Showing one under the same
name is exactly the failure this ledger exists to prevent.