In business news, share prices of U.S. high-tech companies plummeted on Monday, wiping out $1.2 trillion in market capitalization after the Chinese startup DeepSeek launched its newest artificial intelligence model, rapidly overtaking ChatGPT as the top free download on Apple’s app store. DeepSeek says its model is far cheaper and efficient to operate than leading AI models from U.S. companies. Shares of chip maker Nvidia plummeted by a combined $593 billion Monday — by far the largest-ever one-day stock market loss for any company in history. U.S. power, utility and natural gas companies also saw steep losses Monday as DeepSeek’s successes cast doubt on a projected surge in demand for energy-guzzling data centers.