Stocks tank on a double whammy of tariff warnings from the Fed and Nvidia

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• Stocks fell as a pair of warnings from Nvidia and the Federal Reserve hit investor confidence.
• Nvidia's forecast of a $5.5 billion earnings hit and export restrictions led to tech-sector declines.
• Fed Chair Jerome Powell's warning of tariff-driven stagflation risk appeared to extend losses.

Stocks tanked on Wednesday as investors digested a double whammy of tariff-related warnings from Nvidia and the Federal Reserve.

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