Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Teradata Corp (TDC - Get Report), where a total volume of 5,976 contracts has been traded thus far today, a contract volume which is representative of approximately 597,600 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 52.4% of TDC's average daily trading volume over the past month, of 1.1 million shares. Particularly high volume was seen for the $32.50 strike call option expiring November 17, 2017, with 1,972 contracts trading so far today, representing approximately 197,200 underlying shares of TDC. Below is a chart showing TDC's trailing twelve month trading history, with the $32.50 strike highlighted in orange:

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LHC Group Inc ( LHCG saw options trading volume of 656 contracts, representing approximately 65,600 underlying shares or approximately 50.8% of LHCG's average daily trading volume over the past month, of 129,035 shares. Especially high volume was seen for the $75 strike call option expiring March 16, 2018, with 200 contracts trading so far today, representing approximately 20,000 underlying shares of LHCG. Below is a chart showing LHCG's trailing twelve month trading history, with the $75 strike highlighted in orange:

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And Energy Recovery Inc ( ERII options are showing a volume of 1,646 contracts thus far today. That number of contracts represents approximately 164,600 underlying shares, working out to a sizeable 50.8% of ERII's average daily trading volume over the past month, of 324,270 shares. Particularly high volume was seen for the $7.50 strike call option expiring November 17, 2017, with 682 contracts trading so far today, representing approximately 68,200 underlying shares of ERII. Below is a chart showing ERII's trailing twelve month trading history, with the $7.50 strike highlighted in orange:

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For the various different available expirations for TDC options, LHCG options, or ERII options, visit StockOptionsChannel.com.