Notable Wednesday Option Activity: C, REGN, ESRX
December 07, 2016 at 14:24 PM EST
Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Citigroup Inc (C), where a total volume of 127,652 contracts has been traded thus far today, a contract volume which is representative of approximately 12.8 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 45.8% of C's average daily trading volume over the past month, of 27.9 million shares..