Notable Wednesday Option Activity: DXCM, TWTR, WBA

Among the underlying components of the S&P 500 index, we saw noteworthy options trading volume today in DexCom Inc (DXCM), where a total of 2,996 contracts have traded so far, representing approximately 299,600 underlying shares. That amounts to about 57.8% of DXCM's average daily trading volume over the past month of 518,730 shares..
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