What is DeepSeek and why did US tech stocks fall?
1. DeepSeek offers cheaper AI alternatives, impacting US tech stocks. 2. Its AI model is gaining popularity, surpassing OpenAI's capabilities. 3. US tech firms' investments are challenged by DeepSeek's efficiency. 4. Nvidia's market value plummeted by $600bn amid DeepSeek's rise. 5. DeepSeek showcases potential AI advancements without heavy resources.