[ConservativeOptionStrategies] MRK May 31 puts

 

Hello,

I hold some MRK 31 puts and have a hard time figuring-out the difference in volatility between those two 31 puts.

http://finance.yahoo.com/q?s=MRK100522P00031000

http://finance.yahoo.com/q?s=MRK1100522P00031000

The second one is for 57 share per contract, as opposed to the usual 100, but that does not seem to justify the difference in volatility or price.

Anyone with an explanation, thanks a lot.

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