Masayoshi Son, chairman and chief executive officer of SoftBank Group Corp., speaks at the SoftBank World event in Tokyo, Japan, on Wednesday, July 16, 2025.Kiyoshi Ota/BloombergMasayoshi Son, the chairman and CEO of global tech investment giant SoftBank Group in Japan, suffered a $13.1 billion wealth wipeout on Wednesday – the biggest net worth drop among all billionaires in Asia, according to Forbes’ Real-Time Billionaires List, amid a global selloff triggered by worries over lofty stock market valuations ...