>>>This is about the options expiring on the 17th, and the call-writers taking all the money played on earnings<<<
That's my belief as well. I could be biased, since I wrote some Feb 500 calls last week and closed out that position today for a healthy profit. But if you look at the massive volume of contracts traded today, I suspect there are others who followed an identical strategy. It will be interesting tomorrow to see how many of today's trades were the closing out of positions rather than simple trading of calls that were already written.