Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Arrowhead Pharmaceuticals Inc (ARWR - Get Report), where a total of 3,324 contracts have traded so far, representing approximately 332,400 underlying shares. That amounts to about 61.7% of ARWR's average daily trading volume over the past month of 538,710 shares. Particularly high volume was seen for the $9 strike call option expiring September 16, 2016, with 533 contracts trading so far today, representing approximately 53,300 underlying shares of ARWR. Below is a chart showing ARWR's trailing twelve month trading history, with the $9 strike highlighted in orange:

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

Ross Stores, Inc. ( ROST) options are showing a volume of 15,725 contracts thus far today. That number of contracts represents approximately 1.6 million underlying shares, working out to a sizeable 58.9% of ROST's average daily trading volume over the past month, of 2.7 million shares. Particularly high volume was seen for the $60 strike put option expiring August 19, 2016, with 5,258 contracts trading so far today, representing approximately 525,800 underlying shares of ROST. Below is a chart showing ROST's trailing twelve month trading history, with the $60 strike highlighted in orange:

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And Outerwall Inc ( OUTR) options are showing a volume of 8,024 contracts thus far today. That number of contracts represents approximately 802,400 underlying shares, working out to a sizeable 58.6% of OUTR's average daily trading volume over the past month, of 1.4 million shares. Especially high volume was seen for the $55 strike call option expiring January 19, 2018, with 2,547 contracts trading so far today, representing approximately 254,700 underlying shares of OUTR. Below is a chart showing OUTR's trailing twelve month trading history, with the $55 strike highlighted in orange:

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For the various different available expirations for ARWR options, ROST options, or OUTR options, visit StockOptionsChannel.com.