GLOBAL MARKETS-World stocks slide on economy concerns, U.S. yields drop

World stocks sold off for a second straight session on Monday on persistent concerns over global economic growth, while benchmark 10-year U.S. Treasury yields fell to more than one-year lows.MSCI's gauge of stocks across the globe shed 0.47 percent, after it posted on Friday its biggest one-day drop in about three months.Investors were still digesting weak U.S. factory data last week that prompted an inversion of the U.S. Treasury yield curve, which is widely seen as an indicator of an economic