Notable Wednesday Option Activity: BLK, ALKS, CME

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Blackrock Inc (BLK), where a total of 3,498 contracts have traded so far, representing approximately 349,800 underlying shares. That amounts to about 53% of BLK's average daily trading volume over the past month of 660,040 shares..
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