Noteworthy Friday Option Activity: RGNX, VHC, COST

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in REGENXBIO Inc (RGNX), where a total volume of 1,740 contracts has been traded thus far today, a contract volume which is representative of approximately 174,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 50.1% of RGNX's average daily trading volume over the past month, of 347,250 shares..