On the brink: Sirius Satellite Radio struggles to show a profit

In a classic case of "buy the rumor, sell the news," Sirius XM Radio (SIRI) has seen its stock fall 95 percent since Howard Stern's first satellite radio show. Stern, who reportedly received $500 million over 5 years to join Sirius in late 2005, helped boost subscribers when he joined. His presence hasn't helped the company boost its stock price.

And neither have car sales. With automakers Chrysler and General Motors (GM) mired in bankruptcy proceedings, Sirius finds itself drifting toward failure. Car sales in the U.S. fell 34 percent in April, according to industry research firm Autodata, and Sirius XM has been feeling the impact as fewer vehicles with satellite radios are being sold.