Artificial intelligence gives real boost to U.S. stock market
Recent advances in artificial intelligence are fueling optimism over how businesses can operate more productively in the years ahead. They are also providing a big boost to the stock market.The S&P 500's 9% rally this year has been driven by a handful of the index's biggest stocks, a number of which are at the center of the AI frenzy that has spread in the wake of the chatbot sensation ChatGPT. Five stocks - Microsoft, Google parent Alphabet, Nvidia, Apple and Meta Platforms - are responsible for the S&P 500's…