According to a spokesperson for CMG, the move was "implemented to help offset labor and food inflation." Traders returned from the long holiday weekend in a buying mood, with the Dow Jones Industrial Average (DJIA) starting the week with a triple-digit gain. Stocks brushed off rising tension between the U.S. and North Korea , as well as a dreary batch of economic data , and instead took an upbeat outlook to the first full week of earnings season.