Masayoshi Son goes on a $100bn shopping spree

IF YOU want to find a spectacular vision of the future, Silicon Valley is not the only place to look. In Tokyo Masayoshi Son, the boss of SoftBank, a Japanese telecoms group, is starting an investment fund worth $100bn which, he hopes, will make him the Warren Buffett of technology. "Masa" is no stranger to risky bets: SoftBank was an early investor in Alibaba, a Chinese e-commerce company, and has sunk $22bn in Sprint, a struggling American telecoms firm. Now he has been seized by the kind of U...