S2: Look at the movement of GENZ. Stock price nose dived from 54.95 to 53.00 and Aug. $55.00 call from 3.30 to 2.40 in the huge volum over 3,000. Now stock price goes back to 54.20 and Option price goes back to 3.10. It looks that the morning desaster has never happened. Please explain this kind of situation. I got real confused.
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