Noteworthy Friday Option Activity: VLO, AA, CHK
August 28, 2015 at 15:08 PM EDT
Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Valero Energy Corp. (VLO), where a total volume of 38,821 contracts has been traded thus far today, a contract volume which is representative of approximately 3.9 million underlying shares (given that every 1 contract represents 100 underlying shares)..