Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Goldman Sachs Group Inc (GS), where a total volume of 48,882 contracts has been traded thus far today, a contract volume which is representative of approximately 4.9 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 210.9% of GS's average daily trading volume over the past month, of 2.3 million shares..