Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Zynex Inc (ZYXI), where a total volume of 964 contracts has been traded thus far today, a contract volume which is representative of approximately 96,400 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 129.1% of ZYXI's average daily trading volume over the past month, of 74,660 shares. Particularly high volume was seen for the $2.50 strike call option expiring December 19, 2025, with 232 contracts trading so far today, representing approximately 23,200 underlying shares of ZYXI. Below is a chart showing ZYXI's trailing twelve month trading history, with the $2.50 strike highlighted in orange:

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

iRobot Corp (IRBT) options are showing a volume of 25,135 contracts thus far today. That number of contracts represents approximately 2.5 million underlying shares, working out to a sizeable 127.7% of IRBT's average daily trading volume over the past month, of 2.0 million shares. Especially high volume was seen for the $5 strike put option expiring January 15, 2027, with 1,976 contracts trading so far today, representing approximately 197,600 underlying shares of IRBT. Below is a chart showing IRBT's trailing twelve month trading history, with the $5 strike highlighted in orange:

And GameStop Corp (GME) options are showing a volume of 56,107 contracts thus far today. That number of contracts represents approximately 5.6 million underlying shares, working out to a sizeable 102.5% of GME's average daily trading volume over the past month, of 5.5 million shares. Particularly high volume was seen for the $25 strike call option expiring March 21, 2025, with 2,752 contracts trading so far today, representing approximately 275,200 underlying shares of GME. Below is a chart showing GME's trailing twelve month trading history, with the $25 strike highlighted in orange: