European stock and bond markets steadied on Tuesday before a euro zone leaders summit to discuss the Greek debt crisis while a further fall in Chinese shares reminded investors of other dark clouds on the horizon. Euro zone leaders meet in Brussels, awaiting proposals from Greek Prime Minister Alexis Tsipras as his country’s banks rapidly run out of cash and the European Central Bank tightened the noose on funding. The Euro STOXX 50 index of euro zone blue-chip shares rose 0.2 percent after falling 2.2 percent on Monday.