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THE ANTIKYTHERA INDEX · PREDICTIVE CAPABILITY STUDY II · COMPONENT LEVEL · WALK-FORWARD VALIDATED · DATA AS OF 12 AUG 2026

Reweight the machine, and it survives out of sample.

The first study located the signal in the pillars. This one goes a level deeper — 38 components, signed reweighting grids, an assessment window stretched to 1962 where the data allows, positioning data from the CFTC, and a walk-forward protocol that re-learns each indicator every month. The output is a register of 22 indicators, each with an out-of-sample track record and a 0–100 confidence score — and an optimised weighting whose IC is identical in both halves of the sample. It supersedes the withdrawn first filing and carries one correction to it.

Components 38Screen cells 3,164OOS months up to 206Register 22 + 6 events
Optimised index
Validated
US IC 0.357 / 0.357 / 0.356

Component-reweighted pillars, stability-selected: walk-forward IC +0.41 on the S&P, +0.30 on the ASX — the equal-weight composite's equity silence is a weighting choice, not a data limit.

Genuine indicators
10 at ceiling
Confidence 92 of a possible ~92

Real-rates → gold, easing-cycle → copper, labour → copper, machine → 10y yields. Commodities and FX carry the strongest component signals, ahead of equities.

Era-dependence
Real
Pre-2004 is the honest test

The economy-contrarian equity signal fails before 2004; AU monetary→equity sign-flips. Both are demoted on the register, whatever their modern-era IC.

01

What changed in the machinery

Everything the first study measured at pillar level is re-measured at component level, on longer data, against a harder test.

Components
38
✓ from the live engine
Weight grids
21k+
✓ signed, normalised
Walk-forward
206m
✓ sign re-learned monthly
Pre-2004
true OOS
⚠ era test applied

The component score histories come from the pipeline's own index engine — the same fixed-band and point-in-time percentile scoring that builds the published index, captured mid-run, never re-implemented. Three data additions extend the reach: the ICE BofA high-yield OAS series restored in full (weekly from December 1996, after the FRED licence cap left the machine's own OAS components with eighteen usable months); CFTC Commitments of Traders positioning back to 1986; and maximum-history market series — the S&P 500 to 1970, the All Ordinaries to 1984, the dollar index to 1971, the 10-year Treasury to 1962. Everything before December 2004 is genuinely out of sample for every claim the first study made.

The validation protocol is walk-forward: at each month the indicator's sign is re-learned from completed observations only (minimum sixty), the signal is that sign times the reading's percentile in its trailing ten years, and the out-of-sample record accumulates from the first qualifying month — roughly 2010 onward, up to 206 months. Each indicator's confidence score (0–100) is mechanical: 25% full-sample strength, 30% walk-forward retention, 20% sub-period consistency, 15% cross-era evidence, 10% sample depth. Without pre-2004 confirmation the ceiling is ~92 — no indicator gets to claim a century it hasn't lived through.