SoftBank Group is trading at ¥6,430.00, up 6.55%, amid a reported semiconductor-sector rebound. - Chip stocks recovered on September 29, with Arm among the strongest gainers. - The move points to sector support, not a clearly identified SoftBank-specific announcement on October 1. - Recent coverage discussed SoftBank’s planned October 1 OpenAI investment tranche, but did not establish it drove this session’s move.