A Bernstein analyst says Comcast executives will need to address their efforts to stabilize the broadband subscriber base and whether these are showing initial success.

Comcast ( NASDAQ: CMCSA) shares are in green before the bell on Thursday after the media and cable giant saw smaller-than-expected broadband and video subscriber losses along with a double beat for the second quarter.

Comcast earnings topped Q2 estimates while video and broadband subscriber losses were less than feared. Comcast stock rose.