CBOE Holdings (CBOE) call put ratio 1 call to 1.51 puts

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CBOE HLDGS (NYSE: CBOE) Delayed: 272.86 +6.19 (2.32%)
Previous Close $266.67    52 Week High $72.53 
Open $270.13    52 Week Low $58.43 
Day High $273.82    P/E 137.12 
Day Low $265.17    EPS $1.99 
Volume 1,874,809