Noteworthy Thursday Option Activity: ATHN, CDK, MDCO

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Athenahealth Inc (ATHN), where a total of 2,163 contracts have traded so far, representing approximately 216,300 underlying shares. That amounts to about 83.2% of ATHN's average daily trading volume over the past month of 259,980 shares..