Investors want Tesla to separate Musk's chairman, CEO roles

Billionaire Elon Musk's grip over Tesla Motors has grown too tight as he pursues a controversial merger of the company with solar-panel maker SolarCity, an investor group complained. CtW Investment Group, a manager of union-based pension funds that hold 200,000 Tesla shares, demanded in a letter that Tesla separate Musk's chairman and CEO roles. CtW...