Mike Ramsey:

Tesla Motors Inc. will sell $500 million worth of shares in a new round of fundraising that suggests the cost of disrupting the global auto industry with its pricey electric vehicles is more expensive than Chief Executive Elon Musk initially thought.
 
 The proposed sale comes on top of more than $4 billion Tesla has raised since the beginning of 2013. The auto maker has sold convertible notes and obtained lines of credit during that period to fund its ambitious bid to move from niche luxury-vehicle maker to a sizable force in the car business.