The stock market is built on data, the key question is: What is a good and fast workflow to find, download and visualize the stock performance of a given company or a group of companies for comparison.
We suggest to use "Yahoo Finance" - the internet pioneer has always provided extensive information for thousands of companies and many US and international stock exchanges.
Here is a step by step guide to get the data for a specific stock. We are looking at the performance of Volkswagen AG, the German car maker - specifically in the light of the recent/ongoing scandal regarding falsified diesel emissions.
Step 1: Yahoo Finance - search for stock symbol