US stocks today: Nasdaq falls at open as DeepSeek's AI chip push rattles markets

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AI summary

US markets opened mixed on Tuesday with the Nasdaq Composite dropping 161 points or 0.62% to 25,960.13 as DeepSeek's AI chip push rattled tech stocks. The S&P 500 slipped 0.28% to 7,516.63 while the Dow Jones edged up 0.09% to 53,104.06. The development raises concerns about competition in the AI semiconductor space and may weigh on Indian IT and tech names.