Increasing unusual option volume: NOV MULN BBD SMMT BIRK KOS VSTS

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National Oilwell Varco Inc. (NYSE: NOV) Delayed: 18.49 --0 (-0%)
Previous Close $18.49    52 Week High $38.89 
Open $18.49    52 Week Low $25.74 
Day High $18.49    P/E 3.40 
Day Low $18.49    EPS $5.44 
Volume 1,652