Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Corning Inc (GLW), where a total volume of 69,147 contracts has been traded thus far today, a contract volume which is representative of approximately 6.9 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 136.7% of GLW's average daily trading volume over the past month, of 5.1 million shares..