Provide major takeaways from Chapter 1 in 50 words. “Reproducible finance is a philosophy about how to do quantitative, data science-driven financial analysis”. This book focuses on three universes, which are “xts”, “tidyverse”, and “tidyquant”. Data visualization is where we translate numbers into shapes and colors, and it will get a lot of attention in this book. Throughout the book, we are going to build a lot of Shiny Applications , like portfolio returns and CAPM beta.