Noteworthy Monday Option Activity: CDK, NCLH, CLF

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in CDK Global Inc (CDK), where a total of 5,053 contracts have traded so far, representing approximately 505,300 underlying shares. That amounts to about 97.9% of CDK's average daily trading volume over the past month of 516,395 shares..