(Reuters) - European shares fell on Monday, with banks leading the decline, as worries that the protracted U.S.-China trade war could push the global economy into recession sent investors scurrying to safer assets.Worsening protests in Hong Kong and a collapse in the Argentine peso added to the downbeat mood around the globe. [MKTS/GLOB]The pan-European STOXX 600 index pared early gains to close 0.3% lower, extending last week's 1.7% loss when worries over an escalation in trade tensions and..