Shares of Activision Blizzard climbed 6% at the open of regular trading Friday morning. The rise followed a release from U.K. regulators regarding their views on Microsoft acquiring the video game maker. The Competition and Markets Authority said early Friday that it believes the merger would not be harmful to competition with respect to video game consoles, making specific reference to the potential for Microsoft to limit distribution of Activision Blizzard video games to purchasers of its Xbox console.