Increasing unusual call option volume: FHN CODI WWR TMQ EC SLNO NOV

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National Oilwell Varco Inc. (NYSE: NOV) Delayed: 21.08 -0.52 (2.41%)
Previous Close $21.60    52 Week High $38.89 
Open $21.62    52 Week Low $25.74 
Day High $21.67    P/E 3.88 
Day Low $21.08    EPS $5.44 
Volume 570,048