Cowen & Co was the most bearish with a $11 price target, which it revised from $18. GoPro said quarterly revenue was hit by a price cut meant to boost demand for its Hero4 Session cameras. GoPro’s helmet- and body-mounted cameras are popular with surfers, skydivers and other adventure sports enthusiasts, but recent advancements in video-shooting capabilities of smartphones are likely eroding GoPro’s consumer base.