Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Titan Pharmaceuticals Inc (TTNP - Get Report), where a total of 4,278 contracts have traded so far, representing approximately 427,800 underlying shares. That amounts to about 262.5% of TTNP's average daily trading volume over the past month of 163,000 shares. Particularly high volume was seen for the $5 strike call option expiring February 17, 2017, with 2,108 contracts trading so far today, representing approximately 210,800 underlying shares of TTNP. Below is a chart showing TTNP's trailing twelve month trading history, with the $5 strike highlighted in orange:

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

FuelCell Energy Inc ( FCEL) options are showing a volume of 4,556 contracts thus far today. That number of contracts represents approximately 455,600 underlying shares, working out to a sizeable 97.9% of FCEL's average daily trading volume over the past month, of 465,155 shares. Especially high volume was seen for the $6 strike call option expiring January 20, 2017, with 2,500 contracts trading so far today, representing approximately 250,000 underlying shares of FCEL. Below is a chart showing FCEL's trailing twelve month trading history, with the $6 strike highlighted in orange:

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And Proto Labs Inc ( PRLB) options are showing a volume of 2,687 contracts thus far today. That number of contracts represents approximately 268,700 underlying shares, working out to a sizeable 96.8% of PRLB's average daily trading volume over the past month, of 277,705 shares. Especially high volume was seen for the $55 strike put option expiring October 21, 2016, with 2,579 contracts trading so far today, representing approximately 257,900 underlying shares of PRLB. Below is a chart showing PRLB's trailing twelve month trading history, with the $55 strike highlighted in orange:

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For the various different available expirations for TTNP options, FCEL options, or PRLB options, visit StockOptionsChannel.com.