SoftBank: blind spots threaten Masayoshi Son’s $100bn Vision

The billionaire's falling valuations are casting doubt on the once-revered Silicon Valley 'power broker'. In the shadow of WeWork woes, Masayoshi Son's investment valuations are falling. Writing in the Financial Times Arash Massoudi, Kana Inagaki and Leo Lewis examine the blind spots which may be hindering the Japanese billionaire.