It appears biopharm stocks are hot, and getting hotter. Two of today’s most unusual, large option trades involve Amicus Therapeutics (NASDAQ:FOLD), and Alexion Pharmaceuticals (NASDAQ:ALXN). Alexion Pharmaceuticals (ALXN) First,  a trader bought 1045 July $160 calls in Alexion Pharmaceuticals (ALXN)  mostly at the ask at prices of $3.30 to $3.50 per call.  This was an opening