Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Home Depot Inc (HD), where a total volume of 16,065 contracts has been traded thus far today, a contract volume which is representative of approximately 1.6 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 55.3% of HD's average daily trading volume over the past month, of 2.9 million shares..