Growth stocks had a blowout week, with two-fifths of the IBD 50 list rising 5% or more. At the top of the list, Akorn (AKRX) rebounded 18.8% for the week, taking back all of the prior week’s loss and ending comfortably above its 10-week moving average. Biogen Idec (BIIB) spiked 15.2% to end far into new highs. Edwards Lifesciences (EW) rose 8.4% for the week, breaking out above a flat base.