Cramer's Lightning Round: Signet Jewelers is a winner

“Mad Money” host Jim Cramer shares his rapid-fire stock recommendations in the lightning round.

Signet Jewelers: Cramer believes CEO Gina Drosos is doing an excellent job and recommends the stock as a winner.

Equinix: Although the stock has gone up significantly, Cramer still likes it very much but cannot recommend it.

Infosys: Cramer describes it as a smart consulting company and expresses his liking for the stock.

Commercial Metals: Cramer considers it a winner.

Amkor: Cramer believes it is a winner.

Arm: Cramer mentions the upcoming lock-up expiration where Softbank will be able to sell a lot of stock. He suggests buying some now and waiting for the lock-up period to end.