shares of semiconductor companies and apple inc suppliers were broadly lower in premarket trading wednesday after bloomberg reported overnight that apple is dropping plans to boost iphone production because an expected surge in demand didnt materialize the vaneck semiconductor etf slumped 19 with all equity components that have traded premarket losing ground led by the 51 drop in stmicroelectronics nvs stock  while shares of nvidia corp shed 12 advanced micro devices inc slid 09 and intel corp eased 01 among suppliers shares of qorvo inc fell 28 skyworks solutions inc gave up 25 on semiconductor corp fell 20 and microchip technology inc lost 11 meanwhile futures for the sp 500 slipped 05 ahead of the open