Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Mastercard Inc (MA), where a total volume of 23,728 contracts has been traded thus far today, a contract volume which is representative of approximately 2.4 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 72.4% of MA's average daily trading volume over the past month, of 3.3 million shares. Especially high volume was seen for the $365 strike call option expiring August 20, 2021, with 3,505 contracts trading so far today, representing approximately 350,500 underlying shares of MA. Below is a chart showing MA's trailing twelve month trading history, with the $365 strike highlighted in orange:

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Today's Most Active Call & Put Options of the S&P 500 »

Starbucks Corp. (SBUX) saw options trading volume of 38,251 contracts, representing approximately 3.8 million underlying shares or approximately 68.4% of SBUX's average daily trading volume over the past month, of 5.6 million shares. Particularly high volume was seen for the $111 strike call option expiring June 04, 2021, with 2,600 contracts trading so far today, representing approximately 260,000 underlying shares of SBUX. Below is a chart showing SBUX's trailing twelve month trading history, with the $111 strike highlighted in orange:

And Arista Networks Inc (ANET) options are showing a volume of 2,537 contracts thus far today. That number of contracts represents approximately 253,700 underlying shares, working out to a sizeable 63.9% of ANET's average daily trading volume over the past month, of 397,055 shares. Especially high volume was seen for the $280 strike put option expiring July 23, 2021, with 1,209 contracts trading so far today, representing approximately 120,900 underlying shares of ANET. Below is a chart showing ANET's trailing twelve month trading history, with the $280 strike highlighted in orange: