Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in HCA Healthcare Inc (HCA), where a total volume of 9,656 contracts has been traded thus far today, a contract volume which is representative of approximately 965,600 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 65.7% of HCA's average daily trading volume over the past month, of 1.5 million shares. Especially high volume was seen for the $185 strike call option expiring March 19, 2021, with 3,900 contracts trading so far today, representing approximately 390,000 underlying shares of HCA. Below is a chart showing HCA's trailing twelve month trading history, with the $185 strike highlighted in orange:

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

BioSig Technologies Inc (BSGM) options are showing a volume of 2,140 contracts thus far today. That number of contracts represents approximately 214,000 underlying shares, working out to a sizeable 62.2% of BSGM's average daily trading volume over the past month, of 344,210 shares. Especially high volume was seen for the $7.50 strike call option expiring January 15, 2021, with 455 contracts trading so far today, representing approximately 45,500 underlying shares of BSGM. Below is a chart showing BSGM's trailing twelve month trading history, with the $7.50 strike highlighted in orange:

And Hyster-Yale Materials Handling Inc (HY) saw options trading volume of 437 contracts, representing approximately 43,700 underlying shares or approximately 62% of HY's average daily trading volume over the past month, of 70,490 shares. Particularly high volume was seen for the $75 strike call option expiring March 19, 2021, with 264 contracts trading so far today, representing approximately 26,400 underlying shares of HY. Below is a chart showing HY's trailing twelve month trading history, with the $75 strike highlighted in orange: