Premarket: World shares are mixed after Wall Street pulls back from its record heights

European markets were mixed and Asian shares mostly fell Tuesday after U.S. stocks pulled away from their record heights. The futures for the S&P 500 and the Dow Jones Industrial Average were up less than 0.1 per cent. In Germany, the DAX gained 0.5 per cent to 24,154.07, while the CAC 40 in Paris …