Home food delivery is surging thanks to ease of online ordering, new study shows By: CNBC.com News July 12, 2017 at 16:02 PM EDT Cowen upgraded Grubhub to outperform following expectations of 80 percent market expansion and GRUB leadership. Read More >> Related Stocks: Amazon.com Grubhub Ord Shs Shake Shack Inc Wingstop Inc