Futures Tumble; Oil Soars On Tanker Attacks Investor's Business DailyDow futures tumble more than 400 points as oil prices continue their ascent amid Iran war: Live updates CNBCStock market today: Dow, S&P 500 slip for second day, oil jumps as Iran war rages on Yahoo FinanceDow futures down more than 500 points as Brent crude again tops $100 a barrel MarketWatch