🤖 AI Summary
Current AI-themed investment strategies lack objective, data-driven metrics to quantify firms’ AI engagement, rendering them susceptible to subjective judgment. This paper proposes a novel AI exposure quantification framework grounded in 10-K annual reports of publicly listed firms. It integrates domain-adapted BERT fine-tuning, named entity recognition, an AI technology lexicon, and weighted TF-IDF to automatically extract verifiable evidence of AI adoption from unstructured regulatory filings—mapping such evidence to financially interpretable, dynamic index constituents for the first time. The resulting market-wide AI exposure index demonstrates statistically significant outperformance in backtests versus conventional benchmarks. Moreover, index values exhibit strong positive correlations with subsequent AI patent filings, AI-related hiring activity, and stock price reactions to AI-relevant events—validating both methodological innovation and practical investment utility.