Tesla Motors, Inc. (Tesla), the electric car company, unveiled its Model 3 in late July 2017 as its stock price continued to appreciate. The Model 3 was priced to sell to the mass market and to potentially compete with the mass-market leaders such as Toyota. The stock market had also responded favourably to Tesla's decision in 2016 to acquire SolarCity, a manufacturer of solar cells, and its decision to build the Gigafactory, the world's largest lithium battery plant. Could Tesla justify its sky-high stock price multiple by simply selling electric cars, or should Tesla become a battery company that could fundamentally change the energy storage industry-or for that matter, some other type of company?

Tesla Motors, Inc. (Tesla), the electric car company, unveiled its Model 3 in late July 2017 as its stock price continued to appreciate. The Model 3 was priced to sell to the mass market and to potentially compete with the mass-market leaders such as Toyota. The stock market had also responded favourably to Tesla’s decision in 2016 to acquire SolarCity, a manufacturer of solar cells, and its decision to build the Gigafactory, the world’s largest lithium battery plant. Could Tesla justify its sky-high stock price multiple by simply selling electric cars, or should Tesla become a battery company that could fundamentally change the energy storage industry—or for that matter, some other type of company?