Noteworthy Monday Option Activity: RRGB, SONO, IMMR

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Red Robin Gourmet Burgers Inc (RRGB), where a total of 2,471 contracts have traded so far, representing approximately 247,100 underlying shares. That amounts to about 76.4% of RRGB's average daily trading volume over the past month of 323,525 shares..