Macro-Financial Fusion for Next-Session VIX and Credit-Risk-Pressure Direction Forecasting with Evidence-Grounded Risk Memos
- Iris Yang
- DOI: 10.5281/zenodo.21624571
- ISA Journal of Business, Economics and Management (ISAJBEM)
Reliable next-session risk monitoring requires models
that remain interpretable under limited and mixed-frequency data. This study
evaluates a lightweight macro-financial fusion framework for forecasting the
direction of the Cboe Volatility Index (VIX) and a transparent
credit-risk-pressure index (CRPI) built from eight FRED series. Daily market
and Treasury observations are aligned with carried-forward monthly policy,
labor, and price indicators; trailing features feed persistence, logistic
regression, random forest, gradient boosting, gated recurrent unit, and
temporal-transformer models under chronological train-validation-test splits.
The VIX task uses 258 observed 2025 rows and yields 162 training, 45
validation, and 41 test sequences after a 10-session window. The longer CRPI
task yields 1,614, 502, and 375 sequences after a 21-session window. Random
forest provides the strongest VIX class balance (accuracy = 0.634, balanced
accuracy = 0.626, F1 = 0.571, ROC-AUC = 0.657), while gradient boosting leads the
CRPI task (accuracy = 0.584, balanced accuracy = 0.576, F1 = 0.519, ROC-AUC =
0.604). The compact transformer does not outperform the tree ensembles. A
deterministic evidence-grounded memo layer converts probabilities and recorded
drivers into eight test-period summaries; complete driver coverage and zero
detected numeric violations are consistency checks by construction, not
evidence of analyst comprehension or autonomous language-model reasoning.
Results support cautious use as a reproducible monitoring and
audit-documentation framework. Limitations include the one-year VIX span, the
rule-defined CRPI proxy, release-vintage uncertainty, and the absence of human
evaluation.
Keywords: VIX, credit-risk pressure, macro-financial forecasting, temporal transformers, evidence-grounded risk communication.