The biggest gain among industries last week came from makers of video games. Healthy fourth-quarter earnings reports sent Activision-Blizzard (ATVI) up 15% for the week, NetEase (NTES) 10% and Zynga (ZNGA) 29%. Electronic Arts (EA), which reported results Jan. 31, jumped 7%. The group was rising after pulling back to a No. 120 rank in Friday's IBD. It started the week at No. 61 out of 197, then slipped after Changyou's (CYOU) fourth-quarter