Biogen (BIIB) November option implied volatility at 64, December is at 55

Go back to Biogen (BIIB) November option implied volatility at 64, December is at 55
BIOGEN IDEC Inc. (NASDAQ: BIIB) Delayed: 221.50 --0 (-0%)
Previous Close $221.50    52 Week High $333.65 
Open $221.50    52 Week Low $223.02 
Day High $221.50    P/E 28.36 
Day Low $221.50    EPS $7.81 
Volume 17