Buyout and partnership news sent biotechs flying on Monday as Novartis ( NVS ) bid $8.7 billion to take out AveXis ( AVXS ), rumors emerged that Celgene ( CELG ) could swipe Agios Pharmaceuticals ( AGIO ), and Ionis Pharmaceuticals ( IONS ) partnered with AstraZeneca ( AZN ) to make a liver disease treatment.