On this episode of Stock Movers: - Netflix (NFLX) shares fell the most in more than four years after the company forecast a second consecutive quarter of slowing sales growth, contributing to investor anxiety about the streaming giant's future. - SpaceX (SPCX) shares tumbled on Friday, putting the rocket and artificial intelligence giant on track to wipe out more than $1 trillion in market value from its all-time high. - US regulators traced a parasite outbreak that's sickened thousands in Michigan and nearby states to shredded iceberg lettuce served at Taco Bell restaurants, identifying a single supplier as the apparent source.