Increasing unusual call option volume: CHGG CXW OMC

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Omnicom Group (NYSE: OMC) Delayed: 78.30 -2.83 (3.49%)
Previous Close $81.13    52 Week High $87.50 
Open $80.49    52 Week Low $66.48 
Day High $80.50    P/E 20.55 
Day Low $77.05    EPS $3.81 
Volume 3,276,567