NEW YORK (Reuters) -Investors will focus in the coming week on whether inflation trends can help sustain the record-breaking stock rally that has received a boost from Donald Trump's victory in the U.S. presidential race. The benchmark S&P 500 surged to an all-time high and hit the 6,000 level for the first time on Friday, as expectations of tax cuts and looser regulations under Trump helped lift the appetite for equities. A reassuring economic outlook from the Federal Reserve, which delivered a widely expected 25 basis point rate cut on Thursday, also helped boost sentiment.