Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Whirlpool Corp (WHR), where a total volume of 5,540 contracts has been traded thus far today, a contract volume which is representative of approximately 554,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 66.4% of WHR's average daily trading volume over the past month, of 834,285 shares..