Notable Wednesday Option Activity: CTAS, ESRX, UAL

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Cintas Corporation (NASD: CTAS), where a total volume of 2,927 contracts has been traded thus far today, a contract volume which is representative of approximately 292,700 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 47.6% of CTAS's average daily trading volume over the past month, of 614,585 shares. Particularly high volum...