Europe\'s main stock markets mostly headed lower on Tuesday, with London\'s benchmark FTSE 100 index falling 0.15 percent to 6,609.84 points. Frankfurt\'s DAX 30 dipped 0.12 percent to 8,387.93 points, while the CAC 40 in Paris edged up 0.02 percent to 4,050.78 compared with Monday\'s closing values.