Now let's take a look at the Options Chain from 2013.08.23
So $CERN closed at $47.44 and check out the volume in the Oct 50 calls: 5,713 calls traded with OI(open interest) only 332 and most of them were bot at offer price around $0.65 - $ 0.90 ( avg. = $0.77)
The following day OI rose to 4,898, meaning that 4,898-332 = 4,566 calls were bot to open at $0.77 for $350k "investment".
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