Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Synaptics Inc (SYNA - Get Report), where a total volume of 4,813 contracts has been traded thus far today, a contract volume which is representative of approximately 481,300 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 98.6% of SYNA's average daily trading volume over the past month, of 488,120 shares. Particularly high volume was seen for the $64 strike call option expiring February 17, 2017, with 2,555 contracts trading so far today, representing approximately 255,500 underlying shares of SYNA. Below is a chart showing SYNA's trailing twelve month trading history, with the $64 strike highlighted in orange:

Loading+chart++2017+TickerTech.com

START SLIDESHOW:
Today's Most Active Call & Put Options of the S&P 500 »

Chart Industries Inc ( GTLS) options are showing a volume of 1,920 contracts thus far today. That number of contracts represents approximately 192,000 underlying shares, working out to a sizeable 96.7% of GTLS's average daily trading volume over the past month, of 198,465 shares. Especially high volume was seen for the $20 strike put option expiring February 17, 2017, with 1,000 contracts trading so far today, representing approximately 100,000 underlying shares of GTLS. Below is a chart showing GTLS's trailing twelve month trading history, with the $20 strike highlighted in orange:

Loading+chart++2017+TickerTech.com

And Horizon Global Corp ( HZN) options are showing a volume of 1,171 contracts thus far today. That number of contracts represents approximately 117,100 underlying shares, working out to a sizeable 87.7% of HZN's average daily trading volume over the past month, of 133,515 shares. Particularly high volume was seen for the $17.50 strike put option expiring February 17, 2017, with 1,117 contracts trading so far today, representing approximately 111,700 underlying shares of HZN. Below is a chart showing HZN's trailing twelve month trading history, with the $17.50 strike highlighted in orange:

Loading+chart++2017+TickerTech.com

For the various different available expirations for SYNA options, GTLS options, or HZN options, visit StockOptionsChannel.com.