Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in OSI Systems, Inc. (OSIS), where a total volume of 402 contracts has been traded thus far today, a contract volume which is representative of approximately 40,200 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 44.7% of OSIS's average daily trading volume over the past month, of 89,880 shares. Especially high volume was seen for the $190 strike call option expiring March 15, 2024, with 122 contracts trading so far today, representing approximately 12,200 underlying shares of OSIS. Below is a chart showing OSIS's trailing twelve month trading history, with the $190 strike highlighted in orange:

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

Outset Medical Inc (OM) options are showing a volume of 5,260 contracts thus far today. That number of contracts represents approximately 526,000 underlying shares, working out to a sizeable 44.1% of OM's average daily trading volume over the past month, of 1.2 million shares. Particularly high volume was seen for the $7 strike call option expiring August 16, 2024, with 5,000 contracts trading so far today, representing approximately 500,000 underlying shares of OM. Below is a chart showing OM's trailing twelve month trading history, with the $7 strike highlighted in orange:

And Badger Meter Inc (BMI) saw options trading volume of 743 contracts, representing approximately 74,300 underlying shares or approximately 43.4% of BMI's average daily trading volume over the past month, of 171,385 shares. Especially high volume was seen for the $125 strike call option expiring February 16, 2024, with 225 contracts trading so far today, representing approximately 22,500 underlying shares of BMI. Below is a chart showing BMI's trailing twelve month trading history, with the $125 strike highlighted in orange: