1. Natural Language Processing Sentiment Analysis of S&P500 Earnings Calls and Abnormal Stock Returns Open Access Author: Sipe, Warren Title: Natural Language Processing Sentiment Analysis of S&P500 Earnings Calls and Abnormal Stock Returns Area of Honors: Finance Keywords: Natural language processingstock returnsearnings calls File: Download Thesis_Sipe_Final.pdf Thesis Supervisors: J. Randall Woolridge, Thesis SupervisorBrian Spangler Davis, Thesis Honors Advisor