Notable Wednesday Option Activity: PFE, WMT, RMD

Among the underlying components of the S&P 500 index, we saw noteworthy options trading volume today in Pfizer Inc (PFE), where a total of 862,874 contracts have traded so far, representing approximately 86.3 million underlying shares. That amounts to about 231.9% of PFE's average daily trading volume over the past month of 37.2 million shares..
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