NRN Stock Index post 6.7% gain Monday

NEW YORK The Nation’s Restaurant News Stock Index on Monday posted its largest one-day percentage gain this year, up 6.7 percent from Friday’s close, in a swing that followed the broader market’s surge. Still, there is investor and analyst concern that the sector’s pressures, including increased commodity costs and slowed consumer traffic, will only get worse before getting better.

As the broader market indexes posted double-digit gains Monday, restaurant sector