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.
SoftBank
SoftBank's stock rally skids on AI bubble fears
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)
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