Dow Jones ends down over 400 points and Nasdaq suffers worst day in 3 weeks as Apple shares slump

U.S. stocks tumbled for a second day on Tuesday as technology shares came under pressure, dragged down by Apple’s continued slump, while investors remained cautious ahead of closely watched remarks by Federal Reserve Chair Jerome Powell and labor-market data, both of which should offer more clues on the central bank’s interest-rate path and the health of the economy.How stocks traded The S&P 500 SPXwas off 52.30 points, or 1%, to end at 5,078.65. The Dow Jones Industrial Average