Notable Wednesday Option Activity: UAL, IBM, DG

Among the underlying components of the S&P 500 index, we saw noteworthy options trading volume today in United Continental Holdings Inc (UAL), where a total of 18,474 contracts have traded so far, representing approximately 1.8 million underlying shares. That amounts to about 51.5% of UAL's average daily trading volume over the past month of 3.6 million shares..