Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Sonic Corp. (SONC), where a total volume of 4,104 contracts has been traded thus far today, a contract volume which is representative of approximately 410,400 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 54.9% of SONC's average daily trading volume over the past month, of 748,065 shares. Particularly high volume was seen for the $22.50 strike put option expiring March 16, 2018, with 2,016 contracts trading so far today, representing approximately 201,600 underlying shares of SONC. Below is a chart showing SONC's trailing twelve month trading history, with the $22.50 strike highlighted in orange:

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Interdigital Inc ( IDCC) saw options trading volume of 1,613 contracts, representing approximately 161,300 underlying shares or approximately 54.9% of IDCC's average daily trading volume over the past month, of 293,845 shares. Particularly high volume was seen for the $70 strike put option expiring September 21, 2018, with 546 contracts trading so far today, representing approximately 54,600 underlying shares of IDCC. Below is a chart showing IDCC's trailing twelve month trading history, with the $70 strike highlighted in orange:

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And Workiva Inc ( WK) saw options trading volume of 959 contracts, representing approximately 95,900 underlying shares or approximately 54.4% of WK's average daily trading volume over the past month, of 176,250 shares. Particularly high volume was seen for the $25 strike call option expiring July 20, 2018, with 700 contracts trading so far today, representing approximately 70,000 underlying shares of WK. Below is a chart showing WK's trailing twelve month trading history, with the $25 strike highlighted in orange:

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