After Novartis AG announced plans to buy the gene therapy developer AveXis Inc. April 9 for $8.7bn, some Biogen investors were left wondering if Biogen shouldn't have been the acquirer instead. Now, Biogen will likely face a deep-pocked big pharma rival in the rare disease market it has dominated since the launch of Spinraza (nusinersen) in late 2016.
Spinraza has morphed into a more pivotal product to Biogen than many investors predicted, particularly as the big biotech's multiple...