Tal Liani

Research in Motion shares plunged Friday a day after the BlackBerry maker's bleak earnings report and the delay in its new smartphone platform raised fresh fears about its survival.

US stocks leaped two percent Friday sparked by the dramatic measures adopted in Brussels to stem the eurozone crisis and stimulate growth, giving the markets a strong end to a rocky first half.

Research In Motion's new chief executive Thorsten Heins said Monday he plans to focus more on the consumer market but that a "drastic change" is not necessary at the struggling BlackBerry maker.