Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Carnival Corp (CCL), where a total volume of 140,497 contracts has been traded thus far today, a contract volume which is representative of approximately 14.0 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 47.4% of CCL's average daily trading volume over the past month, of 29.7 million shares. Especially high volume was seen for the $24 strike call option expiring September 03, 2021, with 19,352 contracts trading so far today, representing approximately 1.9 million underlying shares of CCL. Below is a chart showing CCL's trailing twelve month trading history, with the $24 strike highlighted in orange:

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

General Mills Inc (GIS) saw options trading volume of 12,748 contracts, representing approximately 1.3 million underlying shares or approximately 45.1% of GIS's average daily trading volume over the past month, of 2.8 million shares. Especially high volume was seen for the $57.50 strike put option expiring September 17, 2021, with 6,037 contracts trading so far today, representing approximately 603,700 underlying shares of GIS. Below is a chart showing GIS's trailing twelve month trading history, with the $57.50 strike highlighted in orange:

And Northrop Grumman Corp (NOC) saw options trading volume of 2,211 contracts, representing approximately 221,100 underlying shares or approximately 42% of NOC's average daily trading volume over the past month, of 527,050 shares. Especially high volume was seen for the $367.50 strike call option expiring August 27, 2021, with 378 contracts trading so far today, representing approximately 37,800 underlying shares of NOC. Below is a chart showing NOC's trailing twelve month trading history, with the $367.50 strike highlighted in orange: