Investors dump blackberry shares

The release of the last quarter sales by Blackberry changed the mind of blackberry investors. Blackberry phones sold below what was expected, they lost 4 million subscribers and had a net loss of $84 million. On friday blackberry shares tumbled by 28 percent. Chief Executive Thorsten Heins has staked the company's future on a new operating system, BlackBerry 10, which it unveiled early this year, and a bevy of phones that run off it. Many investors have bet this turnaround plan could work, sending RIM's shares up 59% in the 12 months before Friday's news.