Noteworthy Thursday Option Activity: ALNY, PG, CSGP

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Alnylam Pharmaceuticals Inc (ALNY), where a total volume of 3,044 contracts has been traded thus far today, a contract volume which is representative of approximately 304,400 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 42.7% of ALNY's average daily trading volume over the past month, of 712,540 shares..
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