Stocks head for sharply lower open as yen surges

U.S. stocks headed for yet another sharply lower open Monday as stock markets tumbled further around the world on worries about the health of the global economy. U.S. stock futures fell but came well off their worst levels. Dow Jones industrial average futures fell 145, or 1.8 percent, to 8,116, after being down more than 200. Standard & Poor's 500 index futures fell 18.70, or 2.16 percent, to 847.30, while Nasdaq 100 index futures fell 21.50, or 1.8 percent, to 1,170.00.