Grubhub (GRUB) option implied volatility decreases

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GRUBHUB, Inc. (NASDAQ: GRUB) Delayed: 6.72 --0 (-0%)
Previous Close $6.72    52 Week High $44.58 
Open $0.01    52 Week Low $17.77 
Day High $6.72    P/E N/A 
Day Low $6.72    EPS $0.00 
Volume 11,648