Bullish option flow detected in ImmunoGen with 1,800 calls trading, 1.9x expected, and implied vol increasing over 1 point to 105.98%. Nov-23 16 calls and Dec-23 13 puts are the most active options, with total volume in those strikes near 1,700 contracts. The Put/Call Ratio is 0.56. Earnings are expected on February 29th.
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