Notable Thursday Option Activity: MSFT, ISRG, VLO

Among the underlying components of the S&P 500 index, we saw noteworthy options trading volume today in Microsoft Corporation (MSFT), where a total of 134,847 contracts have traded so far, representing approximately 13.5 million underlying shares. That amounts to about 51.6% of MSFT's average daily trading volume over the past month of 26.1 million shares..