Mobile Teleystems (P/C Chart, news, volatility) is down $1.09 to $18.56 and puts are seeing action. Just after Noon ET, 2600 Feb 20s traded mid-market for $2.30 while 3,300 Feb 17.5s traded offer-side for $1.20. The activity appears to be a roll, closing a position opened on Jan 20 when two blocks (1,300 ea.) Feb 20s traded offeside for $1.85 and $1.90. If so, the strategist banked .425 profit and possibly opened a similar position in the 17.5s. It might be a play on earnings as the last profit report was Nov 13.