DoorDash was the best-performing stock in the S&P 500 Friday. Chelsea Guglielmino / Getty Images Morgan Stanley named Micron Technology (MU) stock as a "top pick" and boosted its price target, and shares of the memory chip manufacturer gained 4.2%. Analysts pointed to a surge in pricing for memory chips, especially Micron's Double Data Rate 5 products, which the investment bank noted are seeing strong demand related to the buildout of AI data centers. Shares of Warner Bros. Discovery (WBD) advanced 4% follo ...