Biogen (BIIB) traders want calls after Buffett anounces position

Biogen (NASDAQ: BIIB) 30-day option implied volatility is at 32; compared to its 52-week range of 25 to 54 after Warren Buffett’s Berkshire Hathaway (BRK-B) on Friday disclosed it took a new 648K share stake in the drugmaker. Call put ratio 2.4 calls to 1 put.

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