CardioNet (BEAT) suffered a beat-down Friday. Shares are down $1.23 to $17.60 and hit a low of $16.55 earlier in the day on no apparent news. In the options market, put volume picked up for a second time this week. 6571 contracts traded, compared to 900 calls. June 17.5 puts are the most actives, with 5,565 traded. Some players might be exiting positions opened Wednesday, when shares were around $18.20 and more than 5,100 contracts traded on the day (90 percent ask-side)–discussed here in WhatsTrading.com Premium. At the same time, it appears that some put buyers are taking positions in June and Nov 15s, sending implied volatility up another 2 points to 72, up from 56 Tuesday. Still Bearish.