Space stocks SPCX, ASTS, RKLB rise on Musk's Mars confidence

Rocket Lab could gain from more NASA launch and space-systems work.

AST SpaceMobile may benefit from broader space-sector momentum.

Space stocks SPCX, ASTS, RKLB found a floor after a brutal July.

Elon Musk's confidence in moon and Mars missions gave space stocks a lift.