Noteworthy Monday Option Activity: BL, RILY, VSTO

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in BlackLine Inc (BL), where a total of 5,239 contracts have traded so far, representing approximately 523,900 underlying shares. That amounts to about 74.2% of BL's average daily trading volume over the past month of 706,105 shares..