Noteworthy Thursday Option Activity: MCK, WYNN, GOOGL

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in McKesson Corp (MCK), where a total volume of 4,564 contracts has been traded thus far today, a contract volume which is representative of approximately 456,400 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 45.6% of MCK's average daily trading volume over the past month, of 1.0 million shares..