Bernstein has upgraded Alibaba's stock rating citing optimism around AI technology, predicting a potential share price increase of over 20%. This follows a significant rise in Alibaba's share prices due to recent advancements in AI, alongside strong quarterly performance.

The article discusses recent trends in the stock market, focusing on the S & P 500's performance in February and insights from market analysts, including Nicholas Colas. Despite a decline in stock prices, there is an optimistic outlook regarding the U.S. economy and upcoming earnings reports from key companies like Nvidia and Alibaba.

Morgan Stanley has upgraded Alibaba's stock, citing strong potential in its AI-driven growth and cloud services, with a significant increase in price target and positive market outlook.