An index ?of ?global equity markets edged higher on Friday, as losses in Europe were partly offset by late gains on Wall Street, with markets ending a turbulent week marked by a global push by central banks to quell inflation. The benchmark S&P 500 and the Nasdaq finished higher after reversing losses in early trade. ?The Dow ended down.Materials, utilities and real estate stocks led declines while technology and industrials drove gains. The S&P 500 and the Dow notched weekly losses, while the Nasdaq posted a weekly gain. The Dow Jones Industrial Average fell 0.18%, the S&P 500 rose 0.17%…