Dendreon (DNDN) calls active as shares rally 6%

Dendreon (Nasdaq: DNDN) is recently up 6 to $41.10. DNDN is expected to release Q1 results on May 2. DNDN April and May calls are active on total call volume of 20K contracts (4K puts). DNDN May call option implied volatility of 45 is below its six-month average of 51 according to Track Data.

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