Replication Package for "Broad Repricing, Limited Exposure Sorting: Semiconductor Stock Reactions to U.S. AI Export Controls"

This replication archive contains the data, source registers, code, audit outputs, and derived results supporting the manuscript “Broad Repricing, Limited Exposure Sorting: Semiconductor Stock Reactions to U.S. AI Export Controls.” It reproduces the locked cross-sectional exposure-sorting models, exact event-level sign-flip inference, concurrent-news audit, portfolio event study, dynamic cumulative abnormal returns, value-weight audit, and benchmark comparisons across SPY, QQQ, and SOXX. The study covers 35 U.S.-traded semiconductor firms and 11 U.S. export-control event clusters from 2019 to 2026. A numerical verification script and SHA-256 checksums are included.