SoftBank’s Big Options Bet Tests Investor Faith in Masayoshi Son

  • Shares of Son’s Japanese conglomerate tumbled on Monday
  • ‘He is never too far from the action when a bubble is formed’
Masayoshi SonPhotographer: Kiyoshi Ota/Bloomberg
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Just when investors thought Masayoshi Son was reining in risk at SoftBank Group Corp., the Japanese billionaire’s foray into highly leveraged derivatives is giving them fresh reason to worry.