KEY POINTS
  • It's that time again! "Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

Sarepta Therapeutics: "I really think you should own it. I prefer Vertex, by the way. I would swap out of it into Vertex, but I think you've got a good one."

Lumentum: "It's a smoke show right now. ... This group has always hurt me when it's gotten this hot, so I want to be careful."