Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Del Frisco's Restaurant Group Inc (DFRG), where a total volume of 843 contracts has been traded thus far today, a contract volume which is representative of approximately 84,300 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 68.7% of DFRG's average daily trading volume over the past month, of 122,770 shares. Particularly high volume was seen for the $15 strike put option expiring March 16, 2018, with 500 contracts trading so far today, representing approximately 50,000 underlying shares of DFRG. Below is a chart showing DFRG's trailing twelve month trading history, with the $15 strike highlighted in orange:

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Nationstar Mortgage Holdings Inc ( NSM) saw options trading volume of 1,758 contracts, representing approximately 175,800 underlying shares or approximately 65.4% of NSM's average daily trading volume over the past month, of 268,660 shares. Particularly high volume was seen for the $20 strike call option expiring November 17, 2017, with 769 contracts trading so far today, representing approximately 76,900 underlying shares of NSM. Below is a chart showing NSM's trailing twelve month trading history, with the $20 strike highlighted in orange:

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And Ubiquiti Networks Inc ( UBNT) options are showing a volume of 8,503 contracts thus far today. That number of contracts represents approximately 850,300 underlying shares, working out to a sizeable 59.1% of UBNT's average daily trading volume over the past month, of 1.4 million shares. Especially high volume was seen for the $60 strike put option expiring November 17, 2017, with 1,619 contracts trading so far today, representing approximately 161,900 underlying shares of UBNT. Below is a chart showing UBNT's trailing twelve month trading history, with the $60 strike highlighted in orange:

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For the various different available expirations for DFRG options, NSM options, or UBNT options, visit StockOptionsChannel.com.