Tesla Motors, the carmaker behind the all-electric Roadster, was on top of the world last week. Their stock shot up an astonishing 41% on opening day, and it looked like the future would be very bright for the innovative automaker. Now, a week later, their stock is trading over $1.60 below the IPO price of $17 per share. According to market experts, a bounce on opening day is to be expected, but new companies must have the market-ready products to back up the stock's performance. Tesla has plans for a sedan, called the Model S, but no platform, workforce or partner to build it. While Toyota has announced an investment in Tesla, it remains to be seen if this will move the production of the Model S sedan forward.