Notable Friday Option Activity: HALO, JACK, STMP

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Halozyme Therapeutics Inc (HALO), where a total of 7,955 contracts have traded so far, representing approximately 795,500 underlying shares. That amounts to about 58% of HALO's average daily trading volume over the past month of 1.4 million shares..
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