Sterling steadies as EU considers Brexit request; stocks inch up

NEW YORK (Reuters) - World stock indexes edged up on Wednesday, with the S&P 500 boosted by gains in shares of Apple that offset Texas Instruments' disappointing forecast, and the British pound steadied as European Union leaders consider London's request for a Brexit delay.On Wall Street, chipmakers fell along with shares of Texas Instruments, while Apple shares rose after Morgan Stanley said the iPhone maker's soon-to-be-launched video streaming service could boost its services revenue."What I..