Asian stock markets retreated on Tuesday and the Australian dollar stumbled after the central bank cut interest rates for the second time in four months as the region’s growth falters in the face of slowing demand from China. Financial spreadbetters expected European markets to open mixed, with Britain’s FTSE 100 likely to open 0.7 percent higher, Germany’s DAX seen 0.2 percent lower and France’s CAC 40 seen down 0.1 percent.