1. Damodaran, A.: Country Default Spreads and Risk Premiums (2020). http://pages.stern.nyu.edu/~adamodar/New_Home_Page/datafile/ctryprem.html
2. Globe Newswire: Tesla Announces a Five-for-One Stock Split (2020). https://ir.tesla.com/press-release/tesla-announces-five-one-stock-split
3. Annual financial reports and 2nd quater financial reports of Tesla and Nio; Yahoo!Finance
4. Macrotrends: https://www.macrotrends.net/2521/30-year-treasury-bond-rate-yield-chart
5. Damodaran, A.: Cost of Capital by Sector (US) (2020). http://people.stern.nyu.edu/adamodar/New_Home_Page/datafile/wacc.htm