Why this matters

Most quantitative models explain how much a series moves: volatility, correlations, regimes, carry. SNAP2D focuses on why it moves: how much of the behaviour is still governed by persistent deterministic structure once linear and volatility baselines have been removed.

The engine does not propose trades, factors or forecasts. It measures how “signal-rich” a time series remains after your own models have done their job — exposing when your stack stands on solid structure, and when it stands on noise.

Residual structure is the last layer of truth in any model. SNAP2D measures it.

Certification (multi-scale invariance)

Beyond measuring structure, SNAP2D can certify it. A run is marked PASS when the residual geometry remains stable across multiple aggregation scales, producing a strong z_min margin — a rigorous indication that the detected structure is not a single-window artefact.

Certification is currently available on weekly horizons, where multi-scale invariance is statistically meaningful.

Structure vs. noise

Quantify how much of a time series remains explainable after AR, GARCH or ML baselines, across assets, horizons and feature sets.

Model-agnostic

SNAP2D sits beside your stack. You keep your forecasts, risk engines and execution — it simply tells you what is still structurally there.

Regime-aware

See when structure tightens, collapses or shifts across regimes, helping research and risk stay aligned with how the market actually behaves.

Certified signal

When enabled, SNAP2D verifies that detected residual structure is multi-scale invariant. The console returns a simple PASS/FAIL status plus a minimum z-score margin.

What conventional models cannot see

Financial time series are not globally linear. They exhibit local, state-dependent geometry that AR, GARCH and machine-learning models tend to smooth away.

  • AR assumes global stationarity and linear dependence, limiting its ability to detect local structural changes.
  • GARCH captures volatility dynamics but does not address residual structural curvature.
  • Machine learning optimises predictive loss, often smoothing away weak but meaningful structural regimes.
  • Wavelets weaken state–volatility interactions when transformed into frequency space.
  • Spectral methods assume global behaviour and miss local nonlinear shape in the state space.

SNAP2D introduces a nonlinear surface jointly adaptive to state and volatility over the residuals, measuring the structural curvature that conventional models leave behind. The result is a new class of market diagnostic: a structural readout of how much deterministic behaviour the market is still carrying in a given window.

Under the hood (high-level)

At a high level, SNAP2D takes:

  • a baseline residual series (after AR / GARCH / ML),
  • a state coordinate (local returns or features),
  • and a volatility-like coordinate,

and learns a smooth two-dimensional structural surface over this space. This surface captures the deterministic curvature that conventional models leave behind. The structural gain R_fin quantifies how much this geometry reduces residual uncertainty relative to the baseline — a direct measure of the market’s remaining deterministic structure. Model internals and operators are never exposed — only the structural diagnostics.

What “certified” means (high-level)

A certification run evaluates whether the same residual geometry persists when the data is re-aggregated across multiple time scales. SNAP2D reports: Status (PASS/FAIL), a conservative minimum z-score margin (z_min), and the list of scales tested. Only the certificate is exposed — no internal operators.

Residual geometry

When residuals reveal the truth

Volatility models can make a series look well-behaved, but residuals often tell a different story. SNAP2D measures how much structure survives after a linear baseline and a GARCH volatility model, and pushes residual autocorrelation close to white-noise levels — without touching your forecasting stack.

The chart shows residual ACF for the same instrument under three treatments:

  • Baseline AR(2) — slow decay, strong positive autocorrelation.
  • GARCH(1,1) — improved volatility modelling, but residual structure remains.
  • SNAP2D — residuals collapse towards zero lag after lag.

For quant teams, it draws the line between modelling volatility and certifying that the residual no longer carries exploitable structure.

R_fin — residual gain factor

SNAP2D’s proprietary residual gain metric R_fin summarises this improvement as a single structural efficiency score against AR and GARCH baselines. Values around 1 indicate noise-dominated regimes; values above 1 indicate nonlinear structure, and values significantly above 1.5 mark strong structural coherence.

Alongside R_fin, SNAP2D also computes R_fin_IQR, a robustness variant that looks only at the central 50% of residuals. High R_fin_IQR means the structural gain is not just driven by tail events, but by the core of the distribution.

PASS / FAIL — certification readout

SNAP2D can optionally run a multi-scale certification step. When the residual geometry remains coherent across the tested scales, the run is marked PASS together with a minimum margin z_min and the list of scales.

Certification is currently calibrated for weekly horizons, where invariance is statistically meaningful.

Residual ACF comparison: Baseline AR(2), GARCH and SNAP2D
SNAP2D residuals
GARCH(1,1) residuals
Baseline AR(2) residuals

Residual autocorrelation collapses under SNAP2D even after AR and GARCH baselines have been applied.

Market structure benchmarks

SNAP2D quantifies how much deterministic structure remains in a time series after removing linear baselines and standard volatility models. The examples below use weekly data and identical parameters across assets. These are not forecasts, but structural readings.

S&P 500 ETF (SPY, 1-week)

R_fin ≈ 1.54 — moderate but persistent nonlinear structure, with a surprisingly strong core (R_fin_IQR ≈ 3.02). Residual curvature drops materially under SNAP2D, revealing periods where the index behaves far from pure noise even after AR(2) and GARCH.

S&P 500 Index (^GSPC, 1-week)

R_fin ≈ 1.79 — higher structural content than the ETF, helped by a longer historical window. Residual structure remains stable across horizons, indicating a non-trivial degree of underlying coherence in a broad benchmark.

Crude Oil (CL=F, 1-week)

R_fin ≈ 1.63 — a noisy, event-driven market with clear pockets of nonlinear determinism (R_fin_IQR ≈ 2.28). SNAP2D reduces residual curvature from roughly 0.63–0.66 (AR / GARCH) to about 0.04.

US 10-year yield (^TNX, 1-week)

R_fin ≈ 1.82 — strong macro-driven structural content. Residual curvature collapses to C ≈ 0.0014, with episodes of very high determinism (R_fin_IQR ≈ 2.86) consistent with regime-driven behaviour in rates.

Shanghai Composite (000001.SS, 1-week)

R_fin ≈ 2.34 — a rare case of pronounced nonlinear determinism in a major index. Baseline AR(2) and GARCH leave substantial residual structure (A ≈ 1.59, B ≈ 1.50), while SNAP2D collapses it to C ≈ 0.037. Structural regimes are clearly visible (R_fin_IQR ≈ 2.62).

Why teams add SNAP2D

Not another strategy. A structural oracle.

SNAP2D does not compete with your models; it interrogates the geometry of their residuals instead. The goal is not to replace your stack, but to show what it is really standing on.

Detect structure-rich regimes

Flag periods where geometry says “there is something there” before you commit research time. Focus alpha search on assets and windows where structural indicators and R_fin are strongest.

Stress-test existing pipelines

Compare strategy performance against SNAP2D structural indicators. See when P&L came from persistent structure versus backtest artefacts or transient inefficiencies.

Align risk with reality

When structure collapses and residuals whiten, SNAP2D shows it. Use it as an additional lens alongside VaR, correlation and volatility metrics to understand when your risk is standing on signal versus noise.

SNAP2D adds a rare capability: not only measuring residual structure, but certifying multi-scale invariance when it holds.

Who uses SNAP2D

Built for teams who already live inside noisy data and care about what their models are truly capturing — not just how nicely they fit the past.

Systematic funds & pods

Filter research by structure. Prioritise alpha exploration on windows and assets where geometry says “there is something there”, rather than where backtests merely look best.

Risk & portfolio engineering

Add a structural layer to VaR, correlation and vol metrics. Track when cross-asset structure tightens or disappears and adjust risk accordingly.

Data & research labs

Test non-price datasets — flows, options surfaces, microstructure, macro and alternative data — for structural persistence before integrating them into production pipelines.

Cross-asset and cross-horizon

Equities · Rates · FX · Commodities · Futures · Options surfaces · Microstructure · Alternative signals

Deployment

Runs where your data already is

SNAP2D is designed to respect existing controls, workflows and regulatory constraints, giving you structural insight without forcing architectural change.

Secure deployment

SNAP2D is designed to operate within controlled research environments without exposing internal operators or proprietary implementation details.

Secure Box

A compiled, encrypted SNAP2D engine running inside your environment (on-prem or VPC). Your data never leaves your infrastructure; the algorithm is delivered as a binary with no access to internal operators or source.

Suitable for certifying structure on proprietary time series under existing governance and controls.

Research integration

SNAP2D can be integrated into research and risk pipelines as a structural diagnostic, with support for custom feeds, features and monitoring.