Noteworthy Friday Option Activity: ILMN, WDC, FFIV

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Illumina Inc (ILMN), where a total volume of 3,756 contracts has been traded thus far today, a contract volume which is representative of approximately 375,600 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 51.2% of ILMN's average daily trading volume over the past month, of 733,235 shares..