GLOBAL MARKETS-Shares, dollar retreat on Trump travel ban, weak U.S. GDP Nasdaq Asia stocks, Nikkei, U.S. futures pull back * Dollar slides on U.S. GDP miss, Trump travel ban * Oil pulled lower by U.S. output increases * Safe-havens yen, gold rally By Nichola SaminatherSINGAPORE, Jan 30 (Reuters) - Asian share markets and U.S ... |