Notable Thursday Option Activity: CSTL, COUR, RMD

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Castle Biosciences Inc (Symbol: CSTL), where a total of 2,062 contracts have traded so far, representing approximately 206,200 underlying shares. That amounts to about 43% of CSTL's average daily trading volume over the past month of 479,055 shares. Particularly high volume was seen for the $30 strike call option expiring February 21, 2025, with 2,020 contracts trading so far today, representing approximately 202,000 underlying shares of CSTL. Below is a chart showing CSTL's trailing twelve month trading history, with the $30 strike highlighted in orange:

Coursera Inc (Symbol: COUR) options are showing a volume of 6,371 contracts thus far today. That number of contracts represents approximately 637,100 underlying shares, working out to a sizeable 42.6% of COUR's average daily trading volume over the past month, of 1.5 million shares. Especially high volume was seen for the $10 strike call option expiring March 21, 2025, with 2,767 contracts trading so far today, representing approximately 276,700 underlying shares of COUR. Below is a chart showing COUR's trailing twelve month trading history, with the $10 strike highlighted in orange:

And ResMed Inc. (Symbol: RMD) saw options trading volume of 3,277 contracts, representing approximately 327,700 underlying shares or approximately 41.1% of RMD's average daily trading volume over the past month, of 797,505 shares. Particularly high volume was seen for the $220 strike put option expiring March 21, 2025, with 501 contracts trading so far today, representing approximately 50,100 underlying shares of RMD. Below is a chart showing RMD's trailing twelve month trading history, with the $220 strike highlighted in orange:

For the various different available expirations for CSTL options, COUR options, or RMD options, visit StockOptionsChannel.com.

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

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