BIIB Stock: Is Biogen Still A Buy After The 14% Spike?
1. Biogen shares rose 14% over five consecutive days. 2. Market capitalization increased by approximately $3.3 billion. 3. Leqembi's regulatory approval in China drives revenue growth. 4. Investors are debating if BIIB is still a good investment. 5. Caution advised as substantial gains can lead to reversals.