Andrew Wilkinson submits: Activision Blizzard, Inc. (ATVI) – The producer of online, console and hand-held games received a vote of confidence by one large options player anticipating bullish movement in the price of its shares through expiration in January 2011. Activision’s shares rallied 2.12% to $12.05 in the first half of the trading session. The optimistic investor established a massive bullish risk reversal on the stock by selling put options to finance the purchase of calls. The trader shed 25,858 puts at the January 2011 $10 strike for a premium of $0.62 apiece in order to purchase the same number of call options at the higher January 2011 $15 strike for a premium of $0.50 each. The investor pockets a net credit of $0.12 per contract – a total of $310,296.00 – on the reversal play, which he keeps as long as Activision’s shares trade above $10.00 through expiration day. Additional profits amass should ATVI-shares surge 24.50% from the current price to surpass the $15.00-level by January expiration. The 51,170 contracts utilized by this investor represent a whopping 32.28% of total existing open interest on the stock of 158,517 lots. Dendreon Corp. (DNDN) – A bear with butterfly wings feasted on the biotechnology company’s put options today as shares of the underlying stock edged 1.15% lower to $35.99. The investor unfurled the wings of a bear-put butterfly spread in the April contract to brace for potentially significant share price erosion ahead of expiration day next month. The trader initiated the spread by purchasing 5,000 puts at the April $30 strike for a premium of $0.82 apiece [wing 1], and by picking up another 5,000 puts at the lower April $20 strike for $0.28 each [wing 2]. The central April $25 strike housed the body of the butterfly, which involved the sale of 10,000 put options for a premium of $0.40 a pop. Net premium paid for the butterfly spread amounts to just $0.30 per contract, but yields maximum potential profits of $4.70 per contract should Dendreon’s shares plummet 30.50% from the current price to $25.00 by expiration day. The most the investor can ever lose is $0.30 per contract – the premium paid for the spread – but he stands to gain more than 15 times that amount if Dendreon’s shares collapse. Options implied volatility on the stock is up 7% to 65.16% thus far in the trading session. Complete Story »