Bullish option flow detected in Biogen (BIIB) with 2,803 calls trading, 2x expected, and implied vol increasing over 2 points to 32.79%. Jan-26 110 calls and Jan-26 190 calls are the most active options, with total volume in those strikes near 1,400 contracts. The Put/Call Ratio is 0.19. Earnings are expected on February 11th.
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