Market cap shrinks by 20% in 1 week after big run-up
SoftBank Group CEO Masayoshi Son and OpenAI CEO Sam Altman have teamed up in pursuit of artificial superintelligence. (Photo by Yutaka Miyaguchi)
YUSUKE YAGI and MOMOKO IMAMURA
November 11, 2025 08:30 JST
TOKYO — SoftBank Group’s market capitalization plunged by 20% in a span of a week, in a sign of concerns that the Japanese tech investor might be swept up in an artificial intelligence bubble after its stock went on a tear.