When Does Context Routing Help? A Systematic Study of Multi-Modal Fusion in Time Series Forecasting
Authors
Ruizhe Zhou, Gaoyuan Du, Xiaoyang Liu, et al.
Target Modules
src/feature_engineering.py
Methodology Type
Pre-Training Diagnostic & RBU Bound
Key Theorem & Mathematical Formulation
Calculates rolling autocorrelation $\rho_h = \mathrm{Corr}(X_t, X_{t+h})$. When $\rho_h > 0.95$ (calm baseline markets), last-value shortcuts dominate and LLM qualitative context fusion is suppressed to prevent hallucination. When $\rho_h \le 0.95$ (exogenous shock events), event memory decay and shock multipliers are dynamically enabled.