Temporal Leakage in Financial News NLP: A Multi-Architecture Audit with a Regime-Specific M&A Signal

arXiv:2608.17223 · cs.CL, cs.LG · Submitted 2026-08-18 · Read on arXiv

cs.CL, cs.LG

Submitted: 2026-08-18

Updated: 2026-09-06

Comments: Paper accepted at EMNLP 2026

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Benchmark — 21× in this paper · explained in 2 episodes
• Fine-Tuning — 13× in this paper · explained in 5 episodes
• Robustness — 12× in this paper · explained in 5 episodes
• Ablation — 10× in this paper · explained in 1 episode
• Transformer — 10× in this paper · explained in 2 episodes
• Accuracy — 8× in this paper · explained in 1 episode
• Calibration — 7× in this paper · explained in 7 episodes
• AUC — 6× in this paper · explained in 2 episodes
• Embeddings — 5× in this paper · explained in 2 episodes
• LoRA Fine-Tuning — 3× in this paper · explained in 3 episodes
• Aggregation — 2× in this paper · explained in 1 episode
• Core — 2× in this paper · explained in 2 episodes
• Domain Shift — 2× in this paper · explained in 4 episodes
• Generalization — 2× in this paper · explained in 13 episodes
• Trace — 2× in this paper · explained in 2 episodes
• Adaptation — 1× in this paper · explained in 1 episode
• Alternation — 1× in this paper · explained in 1 episode
• Benchmarking — 1× in this paper · explained in 3 episodes
• Causal Discovery — 1× in this paper · explained in 2 episodes
• Causal Inference — 1× in this paper · explained in 4 episodes
• Chain-of-Thought (CoT) — 1× in this paper · explained in 4 episodes
• In-Context Learning — 1× in this paper · explained in 4 episodes
• In-Context Learning (ICL) — 1× in this paper · explained in 5 episodes
• Scaffolding — 1× in this paper · explained in 3 episodes
• Self-Supervised Learning — 1× in this paper · explained in 8 episodes
• Structured Prompting — 1× in this paper · explained in 2 episodes

Sources

• FinBERT: Financial Sentiment Analysis with Pre-trained Language Models
• The Llama 3 Herd of Models
• RoBERTa: A Robustly Optimized BERT Pretraining Approach
• Can ChatGPT Forecast Stock Price Movements? Return Predictability and Large Language Models
• BloombergGPT: A Large Language Model for Finance
• PIXIU: A Large Language Model, Instruction Data and Evaluation Benchmark for Finance
• Qwen2.5 Technical Report
• FinGPT: Open-Source Financial Large Language Models
• FinBERT: A Pretrained Language Model for Financial Communications

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