Cramer said the weakness in Seattle Genetics shares after a strong run could be a buying opportunity for investors. To read a full recap of "Mad Money" on CNBC, click here. To sign up for Jim Cramer's free Booyah! newsletter with all of his latest articles and videos please click here.To watch replays of Cramer's video segments, visit the Mad Money page on CNBC. -- Written by Margo D. Beller in New York.