Among the stock activity stories for Friday, Dec. 21, from AP Business News:
— Nike Inc. shares rose after the world's largest athletic gear maker beat Wall Street expectations for the second quarter.
— Shares of KB Home fell a day after the homebuilder reported better-than-expected quarterly results, but its growth in orders for new homes disappointed some investors. Some analysts were also not impressed by the company's margins and deliveries.
— Red Hat Inc.'s shares jumped on the software company's solid third-quarter results and plans to acquire cloud-based software company ManageIQ.