Ariad Pharmaceuticals Inc fka ARIA

[Whosetosay]

So hard to really tell here, possible that someone just rolled a naked 10000 put pos from the May3's, out to the Nov5's. There is enough open interest that the May tx could close out 10,000 short contracts for May, and opened short anew in Nov. tomorrow's open interest tally should tell us.

Whatever the case, it's bullish, as this trader is short either 10K or 20K puts.