Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Occidental Petroleum Corp (Symbol: OXY), where a total volume of 24,611 contracts has been traded thus far today, a contract volume which is representative of approximately 2.5 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 80.7% of OXY's average daily trading volume over the past month, of 3.0 million shares. Particularly high volume was seen for the $66 strike call option expiring September 08, 2017 , with 7,500 contracts trading so far today, representing approximately 750,000 underlying shares of OXY. Below is a chart showing OXY's trailing twelve month trading history, with the $66 strike highlighted in orange:

Vertex Pharmaceuticals, Inc. (Symbol: VRTX) saw options trading volume of 8,673 contracts, representing approximately 867,300 underlying shares or approximately 68.4% of VRTX's average daily trading volume over the past month, of 1.3 million shares. Especially high volume was seen for the $165 strike call option expiring October 20, 2017 , with 3,969 contracts trading so far today, representing approximately 396,900 underlying shares of VRTX. Below is a chart showing VRTX's trailing twelve month trading history, with the $165 strike highlighted in orange:

And American International Group Inc (Symbol: AIG) options are showing a volume of 29,809 contracts thus far today. That number of contracts represents approximately 3.0 million underlying shares, working out to a sizeable 61.1% of AIG's average daily trading volume over the past month, of 4.9 million shares. Especially high volume was seen for the $62.50 strike call option expiring October 20, 2017 , with 8,541 contracts trading so far today, representing approximately 854,100 underlying shares of AIG. Below is a chart showing AIG's trailing twelve month trading history, with the $62.50 strike highlighted in orange:

For the various different available expirations for OXY options , VRTX options , or AIG options , visit StockOptionsChannel.com.
Today's Most Active Call & Put Options of the S&P 500 »
The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc.
The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc.
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