Bullish option flow detected in Altimmune (ALT) with 21,481 calls trading, 3x expected, and implied vol increasing over 41 points to 114.79%. 2/27 weekly 4.5 calls and 1/30 weekly 6 calls are the most active options, with total volume in those strikes near 5,500 contracts. The Put/Call Ratio is 0.18. Earnings are expected on February 26th.
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