A trader bought 750 OSUR Dec 7.5 Puts for $1.10 (13.6 times usual volume) with stock at $6.62
A trader bought 1,000 ABMD Jan 25 Puts for $0.57 (7.4 times usual volume) with stock at $28.62
A trader bought 11,000 CBST Jan 65 Puts for $2.60 (14.9 times usual volume) with stock at $71.20
A trader sold 3,750 BKS Dec 17 Calls to buy the 16-14 Put Spread for $0.46 (10 times usual volume) with stock at $15.70
