&lt;p&gt;President of Japan&#39;s mobile carrier Softbank Masayoshi Son announces that Softbank will acquire US-based Sprint Nextel in Tokyo on October 15, 2012. Shares in Softbank soared 10 percent in Tokyo trade on Tuesday as investors piled back into a stock that has been pounded since news of its $20 billion takeover of Sprint Nextel emerged.&lt;/p&gt;