Shares of Tesla surged more than 13% before the opening bell on Thursday after CEO Elon Musk told investors he expects the company’s electric vehicle sales to rise by between 20% and 30% next year as preparations are underway for the rolling out of more affordable models.Tesla, whose market capitalization at the close of trading on Wednesday reached nearly $670 billion, is poised to add another $80 billion to its value on Thursday thanks to the optimistic forecast, which calls for a “slight growth” in deliv ...