Europe's main stock markets slid at the start of trading on Wednesday, after overnight losses on Wall Street, with London's benchmark FTSE 100 index down 0.41 percent at 5,851.07 points. Frankfurt's DAX 30 also fell 0.41 percent to 6,787.81 points and in Paris the CAC 40 fell 0.57 percent to 3,923.25. 