Stock prices are hard to predict. One significant factor that influences the stock market is corporate earnings announcements. They provide crucial insights into a company's financial health, often leading to movement in stock prices. We believe that a more precise understanding of earnings calls gives us better insight into the stock market. Building upon sentiment analysis of earnings call transcripts using NLP, we implemented machine learning models to predict percentage changes in stock prices surrounding earnings calls. Based on our predictions, we want to find out factors that affect the stock price movement the most, and devise a simple trading strategy.