GLOBAL MARKETS-Stocks tumble as bond markets sound U.S. recession warning !
U.S. stocks futures fell, with E-minis for the S&P 500 ESc1 skidding 0.5 percent. MSCI's broadest index of Asia-Pacific shares outside Japan .MIAPJ0000PUS dropped 1.4 percent to a one-week trough in a broad sell-off in equities in the region.