(Corrects milestone date in paragraph 13 to January 2020 from December 2019) By Katanga Johnson WASHINGTON (Reuters) -Stock indexes around the globe traded mixed despite strong Amazon earnings and upbeat economic data on Friday, while gold prices slipped under pressure from a firmer dollar and higher U.S. Treasury yields, potentially bolstering the case for Federal Reserve rate hikes. Earlier in the session, a sell-off in bonds briefly pushed Germany’s 5-year yield positive for the first time in four years after the European Central Bank was more hawkish than expected. Asian equities held firm…