Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Maxwell Technologies Inc (MXWL), where a total volume of 1,732 contracts has been traded thus far today, a contract volume which is representative of approximately 173,200 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 95.9% of MXWL's average daily trading volume over the past month, of 180,680 shares. Especially high volume was seen for the $4 strike call option expiring March 16, 2018, with 1,000 contracts trading so far today, representing approximately 100,000 underlying shares of MXWL. Below is a chart showing MXWL's trailing twelve month trading history, with the $4 strike highlighted in orange:

Loading+chart++2018+TickerTech.com

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

ImmunoGen, Inc. ( IMGN) options are showing a volume of 28,908 contracts thus far today. That number of contracts represents approximately 2.9 million underlying shares, working out to a sizeable 95.7% of IMGN's average daily trading volume over the past month, of 3.0 million shares. Particularly high volume was seen for the $10 strike put option expiring April 20, 2018, with 13,167 contracts trading so far today, representing approximately 1.3 million underlying shares of IMGN. Below is a chart showing IMGN's trailing twelve month trading history, with the $10 strike highlighted in orange:

Loading+chart++2018+TickerTech.com

And Cleveland-Cliffs Inc ( CLF) options are showing a volume of 99,022 contracts thus far today. That number of contracts represents approximately 9.9 million underlying shares, working out to a sizeable 76.2% of CLF's average daily trading volume over the past month, of 13.0 million shares. Particularly high volume was seen for the $6 strike call option expiring May 18, 2018, with 23,627 contracts trading so far today, representing approximately 2.4 million underlying shares of CLF. Below is a chart showing CLF's trailing twelve month trading history, with the $6 strike highlighted in orange:

Loading+chart++2018+TickerTech.com

For the various different available expirations for MXWL options, IMGN options, or CLF options, visit StockOptionsChannel.com.