Why Isn't Biogen Stock Soaring After This Major FDA Approval?

Why Isn't Biogen Stock Soaring After This Major FDA Approval?

Source: 
Motley Fool
snippet: 
  • The FDA gave full approval for Alzheimer's drug Leqembi in July.
  • Despite the positive news, Biogen's stock didn't take off.
  • That's because the company still faces some significant headwinds.