Japan chip stocks extend losses as DeepSeek worries fuel Wall Street tech rout

1. Japanese chip stocks fell, questioning U.S. semiconductor leadership. 2. DeepSeek's AI model outperformed OpenAI, raising competitive concerns. 3. Nvidia lost $600 billion in market cap after a 17% drop. 4. Investors rotated into defensive sectors amid chip market decline. 5. Strict U.S. restrictions may impact semiconductor supply and innovation.