Electric cars: However we got here, the road ahead looks enticing

Within two weeks of Tesla announcing that it was applying an open source philosophy to its electric car patent portfolio back in 2014, its share price had increased by almost 20%. In effect, the company had unilaterally decided to let others use a substantial portion of its intellectual property, for free. The investor response appears to have been well judged – earlier this year the share price was almost double its 2014 levels.