Semiconductor stocks dropped as investors overlooked Samsung's upbeat results. It's the latest sign that beating results isn't enough to please investors in the AI revolution Chinese AI startup Deepseek is reportedly building its own chip to sidestep U.S. export bans. Investors dumped semiconductor stocks on Tuesday after results from Samsung Electronics failed to meet Wall Street's lofty artificial intelligence demand expectations. Shares dropped 8% even after the South Korean electronics company's quarterly profit surpassed both Nvidia and Apple, and the company said it expects operating profit to jump $1,800%. The results are the latest sign on Wall Street that sometimes…