Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Patterson-UTI Energy Inc. (PTEN - Get Report), where a total volume of 16,388 contracts has been traded thus far today, a contract volume which is representative of approximately 1.6 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 44.5% of PTEN's average daily trading volume over the past month, of 3.7 million shares. Especially high volume was seen for the $29 strike put option expiring January 20, 2017, with 14,388 contracts trading so far today, representing approximately 1.4 million underlying shares of PTEN. Below is a chart showing PTEN's trailing twelve month trading history, with the $29 strike highlighted in orange:

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Tenet Healthcare Corp. ( THC) saw options trading volume of 10,945 contracts, representing approximately 1.1 million underlying shares or approximately 44.2% of THC's average daily trading volume over the past month, of 2.5 million shares. Particularly high volume was seen for the $20 strike call option expiring May 19, 2017, with 4,323 contracts trading so far today, representing approximately 432,300 underlying shares of THC. Below is a chart showing THC's trailing twelve month trading history, with the $20 strike highlighted in orange:

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And Boise Cascade Co. ( BCC) saw options trading volume of 1,117 contracts, representing approximately 111,700 underlying shares or approximately 44.2% of BCC's average daily trading volume over the past month, of 252,450 shares. Particularly high volume was seen for the $25 strike call option expiring January 20, 2017, with 1,100 contracts trading so far today, representing approximately 110,000 underlying shares of BCC. Below is a chart showing BCC's trailing twelve month trading history, with the $25 strike highlighted in orange:

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