Notable Friday Option Activity: ONCE, SQ, PYPL

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Spark Therapeutics Inc (ONCE), where a total volume of 2,453 contracts has been traded thus far today, a contract volume which is representative of approximately 245,300 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 47.2% of ONCE's average daily trading volume over the past month, of 520,040 shares..