Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in RTX Corp (RTX), where a total volume of 26,739 contracts has been traded thus far today, a contract volume which is representative of approximately 2.7 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 65.6% of RTX's average daily trading volume over the past month, of 4.1 million shares..